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iphone Programming Glossary: beforeHow can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone EPUploader Private Uploader Private upload Uploads the given file. The file is compressed before beign uploaded. The data is uploaded using an HTTP POST command. Results None Side effects None ..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application or Mail implemented this system for choosing associated applications or will they do nothing as before iphone ios cocoa touch ipad share improve this question File type handling is new with iPhone OS..
How To Make iPhone App compatible with multiple SDK (firmware) versions http://stackoverflow.com/questions/3027120/how-to-make-iphone-app-compatible-with-multiple-sdk-firmware-versions device that doesn't have the newer symbols. You must check to see that a newer method is available before calling it. You have to make sure not to call a method that is 5.0 or 4.X only when your app is on a..
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk the products of the previous SDKs to submit to the app store. FWIW I plan on doing just this check before I ship. What condition my condition is in Matt Gallagher has a Cocoa with Love post on version conditional..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received You can find more information in the answers below. Have you encountered the EXC_BAD_ACCESS signal before and how did you deal with it iphone objective c ios xcode cocoa touch share improve this question.. with Objective C in general. If you've come from another background it can take a little while before you really internalise the memory management rules unless you make a big point of it. Remember anything..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework have got back exactly what we started out with release our precalculated bobbins and done But wait before you unpack there is one final thing that needs to be done Need to see the documentation for this one.....
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone failureblock A couple of things to note are that this uses blocks which were new to me before I started my iOS4 porting but you might like to look at http www.mikeash.com pyblog friday qa 2008 12..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints as if you scroll the pages you can see a lower res version of the page for just less than a second before a crisp version appears. Im rendering 2 pages each side of the page in focus so that the PDF image is.. rendering 2 pages each side of the page in focus so that the PDF image is ready to mask the layer before it starts drawing.Pages are destroyed again when they are 2 pages away from the focused page. Does anyone.. ctx kCGInterpolationHigh CGContextSetRenderingIntent ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is..
How to customize the background/border colors of a grouped table view cell? http://stackoverflow.com/questions/400965/how-to-customize-the-background-border-colors-of-a-grouped-table-view-cell corners look a little funny but we moved to a different design and scrapped the custom backgrounds before I had a chance to fix it. Still this will probably be very helpful for you CustomCellBackgroundView.h..
How do I detect that an iOS app is running on a jailbroken phone? http://stackoverflow.com/questions/413242/how-do-i-detect-that-an-ios-app-is-running-on-a-jailbroken-phone jailbroken iPhone how would I go about determining this I thought someone had asked this question before but I cannot seem to find it now. iphone jailbreak share improve this question It depends what..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData...
Change User Agent in UIWebView (iPhone SDK) http://stackoverflow.com/questions/478387/change-user-agent-in-uiwebview-iphone-sdk dictionary See previous edits on this post if you need methods that work in versions of iOS before 4.3 5.0. Note that because of the extensive edits the following comments other answers on this page..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c protocol as @optional like most delegate methods you still need to check with respondsToSelector before calling a particular method on it. Apple recommends this method because it is more precise doesn't mess..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c will hit zero and bad memory will be returned to the caller. The answer is to call autorelease before returning the string. By explicitly calling autorelease we pass the responsibility for releasing the..
Is there a good charting library for iPhone? [closed] http://stackoverflow.com/questions/769749/is-there-a-good-charting-library-for-iphone Cocoa on the Mac that can be adapted but haven't found anything great yet. Anybody dealt with this before Any recommendations I did find Core Plot but it seems to be in the early stages of development. Edit..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring to cook some code as follows. Note Please compare the details shared in this post with other posts before marking this as DUPLICATE and not just by the subject. NSArray getDataCountersForType int type BOOL..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos UPDATE Ok I managed to get it working at least to geotag properly pictures returned by the picker. Before triggering the UIImagePickerController it's up to you to use the CLLocationManager to retrieve the current..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared. Before modern Objective C in old Obj C 2.0 you didn't have a lot of choices. Instance variables used to be..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults to hold some data. I make objects for this class and I need to them to last between sessions. Before I was putting all my information in NSUserDefaults but this isn't working. NSUserDefaults setObject..
http://stackoverflow.com/questions/3097244/exit-application-in-ios-4-0 application in iOS 4.0 Before iOS4.0 clicking the home button on iPhone exits the application and Apple had in their guide that programmatically..
How do you beta test an iphone app? http://stackoverflow.com/questions/40154/how-do-you-beta-test-an-iphone-app that will work with multiple apps and added a beta tester. My setup Xcode 3.2.1 iPhone SDK 3.1.3 Before you get started make sure that.. You can run the app on your own iPhone through Xcode. Step A Add devices..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield NSUInteger newLength textField.text length string length range.length return newLength 25 NO YES Before the text field changes the UITextField asks the delegate if the specified text should be changed. The..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer to the context and fill the context Now create a larger rectangle that can bound the visible path. Before closing this path add the visible path. Then close the path so that you create a shape with the visible..
How do I reset after a UIScrollView zoom? http://stackoverflow.com/questions/448285/how-do-i-reset-after-a-uiscrollview-zoom CALayer retainCount message sent to deallocated instance I'm never deallocating any layers myself. Before I wasn't even deleting any views or anything. This error was being thrown on zoom and also on rotate...
How to distribute ios application wirelessly without managing UDIDs and recompilation http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil distribution profile you want to use. Click next then choose a location to save the .ipa file to. Before you click Save you need to check Save for Enterprise Distribution The .ipa file needs to be saved on..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud and get upset when it simply does its job I added a category to UIImage to fix that header omitted Before you waste time editing this please remember that a semi colon at the end of a method definition is valid..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone filePath return filePath @end Uploader @implementation EPUploader Private Uploader Private upload Uploads the given file. The file is compressed before beign uploaded. The data is uploaded using an HTTP POST command. Results None Side effects None void upload NSData data NSData dataWithContentsOfFile filePath..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application This leads me to the question have system apps like Safari or Mail implemented this system for choosing associated applications or will they do nothing as before iphone ios cocoa touch ipad share improve this question File type handling is new with iPhone OS 3.2 and is different than the already existing custom URL..
How To Make iPhone App compatible with multiple SDK (firmware) versions http://stackoverflow.com/questions/3027120/how-to-make-iphone-app-compatible-with-multiple-sdk-firmware-versions in the newer iOS. This is so your app will run on a device that doesn't have the newer symbols. You must check to see that a newer method is available before calling it. You have to make sure not to call a method that is 5.0 or 4.X only when your app is on a 4.0 device. Of course you have to gracefully handle working..
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk a fancy compiler and simulator. But you can no longer use the products of the previous SDKs to submit to the app store. FWIW I plan on doing just this check before I ship. What condition my condition is in Matt Gallagher has a Cocoa with Love post on version conditional code entitled Tips Tricks for conditional iOS3 iOS3.2..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received typically thrown as the result of an illegal memory access. You can find more information in the answers below. Have you encountered the EXC_BAD_ACCESS signal before and how did you deal with it iphone objective c ios xcode cocoa touch share improve this question From your description I suspect the most likely explanation.. development for a few weeks but not whether you are experienced with Objective C in general. If you've come from another background it can take a little while before you really internalise the memory management rules unless you make a big point of it. Remember anything you get from an allocation function usually the static alloc..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework array from A. then we compare just to check that we have got back exactly what we started out with release our precalculated bobbins and done But wait before you unpack there is one final thing that needs to be done Need to see the documentation for this one... in order to optimise different routines return values that..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone assetForURL asseturl resultBlock resultblock failureBlock failureblock A couple of things to note are that this uses blocks which were new to me before I started my iOS4 porting but you might like to look at http www.mikeash.com pyblog friday qa 2008 12 26.html and http developer.apple.com library ios #documentation..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints the scale is 1. iBooks takes a similar double take approach as if you scroll the pages you can see a lower res version of the page for just less than a second before a crisp version appears. Im rendering 2 pages each side of the page in focus so that the PDF image is ready to mask the layer before it starts drawing.Pages are.. just less than a second before a crisp version appears. Im rendering 2 pages each side of the page in focus so that the PDF image is ready to mask the layer before it starts drawing.Pages are destroyed again when they are 2 pages away from the focused page. Does anyone have any insights no matter how small or obvious to improve.. to prepare pages ahead of time. call CGContextSetInterpolationQuality ctx kCGInterpolationHigh CGContextSetRenderingIntent ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory wrap the docRef into a singleton. Cancel..
How to customize the background/border colors of a grouped table view cell? http://stackoverflow.com/questions/400965/how-to-customize-the-background-border-colors-of-a-grouped-table-view-cell bg view. There's a drawing bug that makes the rounded corners look a little funny but we moved to a different design and scrapped the custom backgrounds before I had a chance to fix it. Still this will probably be very helpful for you CustomCellBackgroundView.h Created by Mike Akers on 11 21 08. Copyright 2008 __MyCompanyName__...
How do I detect that an iOS app is running on a jailbroken phone? http://stackoverflow.com/questions/413242/how-do-i-detect-that-an-ios-app-is-running-on-a-jailbroken-phone phone If I want my app to behave differently on a jailbroken iPhone how would I go about determining this I thought someone had asked this question before but I cannot seem to find it now. iphone jailbreak share improve this question It depends what you mean by jailbreak. In the simple case you should be able..
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll The app already has an NSFetchedResultsController with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some questions Do I need to have a second NSFetchedResultsController..
Change User Agent in UIWebView (iPhone SDK) http://stackoverflow.com/questions/478387/change-user-agent-in-uiwebview-iphone-sdk UserAgent nil NSUserDefaults standardUserDefaults registerDefaults dictionary See previous edits on this post if you need methods that work in versions of iOS before 4.3 5.0. Note that because of the extensive edits the following comments other answers on this page may not make sense. This is a four year old question after all...
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c the methods in the protocol. For methods declared in the protocol as @optional like most delegate methods you still need to check with respondsToSelector before calling a particular method on it. Apple recommends this method because it is more precise doesn't mess with NSObject and can provide better tool support. Speed..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application n is smaller than UIApplication backgroundTimeRemaining it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location is one of the three allowed types of background execution ...
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c that created it. If we call release however the reference count will hit zero and bad memory will be returned to the caller. The answer is to call autorelease before returning the string. By explicitly calling autorelease we pass the responsibility for releasing the string on to the thread's NSAutoreleasePool which will happen..
Is there a good charting library for iPhone? [closed] http://stackoverflow.com/questions/769749/is-there-a-good-charting-library-for-iphone for iPhone yet. I've also looked for something written for Cocoa on the Mac that can be adapted but haven't found anything great yet. Anybody dealt with this before Any recommendations I did find Core Plot but it seems to be in the early stages of development. Edit to add some details of requirements as they currently stand..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring details which were helpful. With these details I've tried to cook some code as follows. Note Please compare the details shared in this post with other posts before marking this as DUPLICATE and not just by the subject. NSArray getDataCountersForType int type BOOL success struct ifaddrs addrs nil const struct ifaddrs cursor..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos no EXIF info will be given through this interface. FINAL UPDATE Ok I managed to get it working at least to geotag properly pictures returned by the picker. Before triggering the UIImagePickerController it's up to you to use the CLLocationManager to retrieve the current CLocation Once you have it you can use this method that..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec I can understand your confusion. Especially since recent updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared. Before modern Objective C in old Obj C 2.0 you didn't have a lot of choices. Instance variables used to be declared in the header between the curly brackets MyClass.h..
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults but I don't know how to fix it. I have made a custom class to hold some data. I make objects for this class and I need to them to last between sessions. Before I was putting all my information in NSUserDefaults but this isn't working. NSUserDefaults setObject forKey Attempt to insert non property value ' Player 0x3b0cc90..
http://stackoverflow.com/questions/3097244/exit-application-in-ios-4-0 application in iOS 4.0 Before iOS4.0 clicking the home button on iPhone exits the application and Apple had in their guide that programmatically exiting the application was not accepted. now..
How do you beta test an iphone app? http://stackoverflow.com/questions/40154/how-do-you-beta-test-an-iphone-app here but here is how I created a general provisioning profile that will work with multiple apps and added a beta tester. My setup Xcode 3.2.1 iPhone SDK 3.1.3 Before you get started make sure that.. You can run the app on your own iPhone through Xcode. Step A Add devices to the Provisioning Portal Send an email to each beta..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield NSRange range replacementString NSString string NSUInteger newLength textField.text length string length range.length return newLength 25 NO YES Before the text field changes the UITextField asks the delegate if the specified text should be changed. The text field has not changed at this point so we grab it's current..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer Create your path Set the fill color you want add this path to the context and fill the context Now create a larger rectangle that can bound the visible path. Before closing this path add the visible path. Then close the path so that you create a shape with the visible path subtracted from it. You might want to investigate the..
How do I reset after a UIScrollView zoom? http://stackoverflow.com/questions/448285/how-do-i-reset-after-a-uiscrollview-zoom zoom throughout Edit New findings The error seems to be CALayer retainCount message sent to deallocated instance I'm never deallocating any layers myself. Before I wasn't even deleting any views or anything. This error was being thrown on zoom and also on rotate. If I delete the object before rotation and re add it afterward..
How to distribute ios application wirelessly without managing UDIDs and recompilation http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil Select iOS App Store Package .ipa and choose the proper distribution profile you want to use. Click next then choose a location to save the .ipa file to. Before you click Save you need to check Save for Enterprise Distribution The .ipa file needs to be saved on an FTP Server or at least that's how I got it to work. For..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud equivaluent that is as easy to use hence people overuse it and get upset when it simply does its job I added a category to UIImage to fix that header omitted Before you waste time editing this please remember that a semi colon at the end of a method definition is valid and a matter of style. UIImage imageFromMainBundleFile..
How can I upload a photo to a server with the iPhone? http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone @implementation EPUploader Private Uploader Private upload Uploads the given file. The file is compressed before beign uploaded. The data is uploaded using an HTTP POST command. Results None Side effects None void upload NSData..
How do I associate file types with an iPhone application? http://stackoverflow.com/questions/2774343/how-do-i-associate-file-types-with-an-iphone-application apps like Safari or Mail implemented this system for choosing associated applications or will they do nothing as before iphone ios cocoa touch ipad share improve this question File type handling is new with iPhone OS 3.2 and is different..
How To Make iPhone App compatible with multiple SDK (firmware) versions http://stackoverflow.com/questions/3027120/how-to-make-iphone-app-compatible-with-multiple-sdk-firmware-versions app will run on a device that doesn't have the newer symbols. You must check to see that a newer method is available before calling it. You have to make sure not to call a method that is 5.0 or 4.X only when your app is on a 4.0 device. Of course..
Install xCode 3.2.3 w/ iPhone SDK 4, get “Base SDK missing”, can't see other SDKs http://stackoverflow.com/questions/3161385/install-xcode-3-2-3-w-iphone-sdk-4-get-base-sdk-missing-cant-see-other-sdk can no longer use the products of the previous SDKs to submit to the app store. FWIW I plan on doing just this check before I ship. What condition my condition is in Matt Gallagher has a Cocoa with Love post on version conditional code entitled..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received memory access. You can find more information in the answers below. Have you encountered the EXC_BAD_ACCESS signal before and how did you deal with it iphone objective c ios xcode cocoa touch share improve this question From your description.. you are experienced with Objective C in general. If you've come from another background it can take a little while before you really internalise the memory management rules unless you make a big point of it. Remember anything you get from an..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework to check that we have got back exactly what we started out with release our precalculated bobbins and done But wait before you unpack there is one final thing that needs to be done Need to see the documentation for this one... in order to optimise..
display image from URL retrieved from ALAsset in iPhone http://stackoverflow.com/questions/3837115/display-image-from-url-retrieved-from-alasset-in-iphone resultblock failureBlock failureblock A couple of things to note are that this uses blocks which were new to me before I started my iOS4 porting but you might like to look at http www.mikeash.com pyblog friday qa 2008 12 26.html and http developer.apple.com..
Fast and Lean PDF Viewer for iPhone / iPad / iOs - tips and hints? http://stackoverflow.com/questions/3889634/fast-and-lean-pdf-viewer-for-iphone-ipad-ios-tips-and-hints take approach as if you scroll the pages you can see a lower res version of the page for just less than a second before a crisp version appears. Im rendering 2 pages each side of the page in focus so that the PDF image is ready to mask the.. version appears. Im rendering 2 pages each side of the page in focus so that the PDF image is ready to mask the layer before it starts drawing.Pages are destroyed again when they are 2 pages away from the focused page. Does anyone have any insights.. CGContextSetInterpolationQuality ctx kCGInterpolationHigh CGContextSetRenderingIntent ctx kCGRenderingIntentDefault before CGContextDrawPDFPage to reduce memory usage while drawing init'ing your NSOperations with a docRef is a bad idea memory..
How to customize the background/border colors of a grouped table view cell? http://stackoverflow.com/questions/400965/how-to-customize-the-background-border-colors-of-a-grouped-table-view-cell makes the rounded corners look a little funny but we moved to a different design and scrapped the custom backgrounds before I had a chance to fix it. Still this will probably be very helpful for you CustomCellBackgroundView.h Created by Mike Akers..
How do I detect that an iOS app is running on a jailbroken phone? http://stackoverflow.com/questions/413242/how-do-i-detect-that-an-ios-app-is-running-on-a-jailbroken-phone differently on a jailbroken iPhone how would I go about determining this I thought someone had asked this question before but I cannot seem to find it now. iphone jailbreak share improve this question It depends what you mean by jailbreak...
How to filter NSFetchedResultsController (CoreData) with UISearchDisplayController/UISearchBar http://stackoverflow.com/questions/4471289/how-to-filter-nsfetchedresultscontroller-coredata-with-uisearchdisplaycontroll with a predicate to retrieve the data for the primary TableView. I want to make sure I'm on the right path before I change too much code. I'm confused because so many of the examples are array based instead of CoreData. Here are some..
Change User Agent in UIWebView (iPhone SDK) http://stackoverflow.com/questions/478387/change-user-agent-in-uiwebview-iphone-sdk registerDefaults dictionary See previous edits on this post if you need methods that work in versions of iOS before 4.3 5.0. Note that because of the extensive edits the following comments other answers on this page may not make sense...
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c declared in the protocol as @optional like most delegate methods you still need to check with respondsToSelector before calling a particular method on it. Apple recommends this method because it is more precise doesn't mess with NSObject and..
How do I get a background location update every n minutes in my iOS application? http://stackoverflow.com/questions/6347503/how-do-i-get-a-background-location-update-every-n-minutes-in-my-ios-application it does works just fine in case n is larger the location manager should be enabled and disabled again before there is no time remaining to avoid the background task being killed. This does work since location is one of the three..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c the reference count will hit zero and bad memory will be returned to the caller. The answer is to call autorelease before returning the string. By explicitly calling autorelease we pass the responsibility for releasing the string on to the thread's..
Is there a good charting library for iPhone? [closed] http://stackoverflow.com/questions/769749/is-there-a-good-charting-library-for-iphone written for Cocoa on the Mac that can be adapted but haven't found anything great yet. Anybody dealt with this before Any recommendations I did find Core Plot but it seems to be in the early stages of development. Edit to add some details..
iPhone Data Usage Tracking/Monitoring http://stackoverflow.com/questions/7946699/iphone-data-usage-tracking-monitoring details I've tried to cook some code as follows. Note Please compare the details shared in this post with other posts before marking this as DUPLICATE and not just by the subject. NSArray getDataCountersForType int type BOOL success struct ifaddrs..
UITableView: deleting sections with animation http://stackoverflow.com/questions/1061071/uitableview-deleting-sections-with-animation when removing sections from a UITableView. they resurfaced when I varied the number of sections rows in the table . Before I lose you because of the shear length of my post let me state the problem clearly and you can read as much as you require..
UIImagePickerController and extracting EXIF data from existing photos http://stackoverflow.com/questions/1238838/uiimagepickercontroller-and-extracting-exif-data-from-existing-photos interface. FINAL UPDATE Ok I managed to get it working at least to geotag properly pictures returned by the picker. Before triggering the UIImagePickerController it's up to you to use the CLLocationManager to retrieve the current CLocation Once..
Declaration/definition of variables locations in ObjectiveC? http://stackoverflow.com/questions/12632285/declaration-definition-of-variables-locations-in-objectivec since recent updates to Xcode and the new LLVM compiler changed the way ivars and properties can be declared. Before modern Objective C in old Obj C 2.0 you didn't have a lot of choices. Instance variables used to be declared in the header..
iPhone Core Data “Automatic Lightweight Migration” http://stackoverflow.com/questions/1830079/iphone-core-data-automatic-lightweight-migration do that. Any suggestions ios iphone core data core data migration share improve this question To recap Full guide Before making any change create a new model version. In Xcode 4 Select your .xcdatamodel Editor Add Model Version. In Xcode 3 Design..
Why am I crashing after MKMapView is freed if I'm no longer using it? http://stackoverflow.com/questions/2188098/why-am-i-crashing-after-mkmapview-is-freed-if-im-no-longer-using-it which will prevent MKMapView from sending messages to it. This is documented in MKMapViewDelegate Protocol Reference Before releasing an MKMapView object for which you have set a delegate remember to set that object ™s delegate property to nil...
How to store custom objects in NSUserDefaults http://stackoverflow.com/questions/2315948/how-to-store-custom-objects-in-nsuserdefaults have made a custom class to hold some data. I make objects for this class and I need to them to last between sessions. Before I was putting all my information in NSUserDefaults but this isn't working. NSUserDefaults setObject forKey Attempt to insert..
http://stackoverflow.com/questions/3097244/exit-application-in-ios-4-0 application in iOS 4.0 Before iOS4.0 clicking the home button on iPhone exits the application and Apple had in their guide that programmatically exiting..
How to Manually Symbolicate iOS Crash to View Crash Logs http://stackoverflow.com/questions/3832900/how-to-manually-symbolicate-ios-crash-to-view-crash-logs iPhoneOS.platform Developer Library PrivateFrameworks DTDeviceKit.framework Versions A Resources symbolicatecrash Before running symbolicatecrash you may wish to go to this directory like cd Applications Xcode.app Contents Developer Platforms..
UIPopOverController for iPhone (currently only available for iPad) http://stackoverflow.com/questions/3878332/uipopovercontroller-for-iphone-currently-only-available-for-ipad for iPhone currently only available for iPad Before I implement something similar for the iPhone I'm wondering if anyone has implemented something similar of the UIPopOverController..
How do you beta test an iphone app? http://stackoverflow.com/questions/40154/how-do-you-beta-test-an-iphone-app provisioning profile that will work with multiple apps and added a beta tester. My setup Xcode 3.2.1 iPhone SDK 3.1.3 Before you get started make sure that.. You can run the app on your own iPhone through Xcode. Step A Add devices to the Provisioning..
Horizontal UIScrollView inside a UITableViewCell http://stackoverflow.com/questions/4324514/horizontal-uiscrollview-inside-a-uitableviewcell a UIScrollView right after initializing the TableViewCell then add it to the TableViewCell and shazam... it works Before UITableViewCell cell tableView dequeueReusableCellWithIdentifier kVolumePreviewCellIdentifier if cell nil cell phVolumePreviewCell..
Set the maximum character length of a UITextField http://stackoverflow.com/questions/433337/set-the-maximum-character-length-of-a-uitextfield NSString string NSUInteger newLength textField.text length string length range.length return newLength 25 NO YES Before the text field changes the UITextField asks the delegate if the specified text should be changed. The text field has not..
Inner shadow effect on UIView layer? http://stackoverflow.com/questions/4431292/inner-shadow-effect-on-uiview-layer want add this path to the context and fill the context Now create a larger rectangle that can bound the visible path. Before closing this path add the visible path. Then close the path so that you create a shape with the visible path subtracted..
How do I reset after a UIScrollView zoom? http://stackoverflow.com/questions/448285/how-do-i-reset-after-a-uiscrollview-zoom error seems to be CALayer retainCount message sent to deallocated instance I'm never deallocating any layers myself. Before I wasn't even deleting any views or anything. This error was being thrown on zoom and also on rotate. If I delete the object..
How do you detect memory leaks on iPhone? http://stackoverflow.com/questions/494327/how-do-you-detect-memory-leaks-on-iphone UIKit Foundations and other SDK classes I didn't write. What am I doing wrong that nothing is showing up from my app Before I hit 3 minutes there are over 100 leaks totaling 2.5k. Is this common iphone xcode memory leaks share improve this question..
Using Phonegap for Native Application development [closed] http://stackoverflow.com/questions/5161004/using-phonegap-for-native-application-development time having access to native features on phone. Also the code is portable from Android to Iphone with some effort. Before I plunge into it I want to know what is forum's experience with Phonegap. What are the pain points and is it really scalable..
How to distribute ios application wirelessly without managing UDIDs and recompilation http://stackoverflow.com/questions/5546581/how-to-distribute-ios-application-wirelessly-without-managing-udids-and-recompil choose the proper distribution profile you want to use. Click next then choose a location to save the .ipa file to. Before you click Save you need to check Save for Enterprise Distribution The .ipa file needs to be saved on an FTP Server or at..
iOS CVImageBuffer distorted from AVCaptureSessionDataOutput with AVCaptureSessionPresetPhoto http://stackoverflow.com/questions/6540710/ios-cvimagebuffer-distorted-from-avcapturesessiondataoutput-with-avcapturesessio row else glTexImage2D GL_TEXTURE_2D 0 GL_RGBA frameWidth frameHeight 0 GL_BGRA GL_UNSIGNED_BYTE pixelBufferAddr Before I was using AVCaptureSessionPresetMedium and getting 30fps. In AVCaptureSessionPresetPhoto I'm getting 16fps on an iPhone..
Dispelling the UIImage imageNamed: FUD http://stackoverflow.com/questions/924740/dispelling-the-uiimage-imagenamed-fud people overuse it and get upset when it simply does its job I added a category to UIImage to fix that header omitted Before you waste time editing this please remember that a semi colon at the end of a method definition is valid and a matter of..
Will my iPhone app take a performance hit if I use Objective-C for low level code? http://stackoverflow.com/questions/926728/will-my-iphone-app-take-a-performance-hit-if-i-use-objective-c-for-low-level-cod example is a C vtable lookup really faster than an Obj C message How much faster Threading polymorphism sorting etc. Before I go on a quest to build a project with duplicate object models and various test code I want to know if anybody has already..
http://stackoverflow.com/questions/1209582/is-it-possible-to-hide-the-tabbar-when-a-button-is-pressed-to-allow-a-full-scree improve this question There's a built in way to do this self.hidesBottomBarWhenPushed YES But you have to do this BEFORE the view is pushed. This is how you might want to use that ChildViewController childVC ChildViewController alloc init childVC.hidesBottomBarWhenPushed..
IOS 6 force device orientation to landscape http://stackoverflow.com/questions/12640870/ios-6-force-device-orientation-to-landscape go from portrait to landscape in IOS 6 and it will be good to work in IOS 5 as well . Here is how I was doing it BEFORE IOS 6 void viewWillAppear BOOL animated super viewWillAppear animated UIViewController c UIViewController alloc init autorelease..
Problem generating APN SSL certificate after submitting to apple store http://stackoverflow.com/questions/2585667/problem-generating-apn-ssl-certificate-after-submitting-to-apple-store review. Once the app was approved I was able to get my push certificate. However apparently you MUST enable for push BEFORE you generate your distribution provisioning profile otherwise your app will not actually be able to register with the APN..
UIView Animation: PartialCurl …bug during rotate? http://stackoverflow.com/questions/2644782/uiview-animation-partialcurl-bug-during-rotate is UIModalTransitionStylePartialCurl. shouldAutorotateToInterfaceOrientation is returning YES. If I rotate the device BEFORE entering the FlipSide everything is okay and the PartialCurl is displayed okay. But if I enter the FlipSide and then rotate..
iOS 4 app crashes at startup on iOS 3.1.3: Symbol not found: __NSConcreteStackBlock http://stackoverflow.com/questions/3313786/ios-4-app-crashes-at-startup-on-ios-3-1-3-symbol-not-found-nsconcretestackbl Expected in usr lib libSystem.B.dylib It appears to be an issue with a fairly low level dynamically linked library BEFORE my main function even gets called. I have even tried re starting the device etc. with no luck. Here's part of the the crash..
http://stackoverflow.com/questions/5457122/rotate-uiview-iphone this animation is modifying the frame of the UIView the puzzle pieces are UIViews . This is my Console output 'frame BEFORE ROTATION 35 178 80 80 ' 'frame AFTER ROTATION 21.3172 164.317 107.366 107.366 ' The second method used is this one CABasicAnimation..
http://stackoverflow.com/questions/5475404/iad-cannot-click-banner NSLog @ ___PROJECTNAME___AppDelegate didFinishLaunchingWithOptions... FIXED now entry in info.plist hides SB BEFORE launch UIApplication sharedApplication setStatusBarHidden SHOW_SB NO YES CGRect appFrame UIScreen mainScreen .applicationFrame..
How to prevent app running in phone-gap from scrolling vertically? http://stackoverflow.com/questions/6193016/how-to-prevent-app-running-in-phone-gap-from-scrolling-vertically media only screen and max device width 480px href iphone.css type text css If you application is targeting iOS BEFORE 4.0 you MUST put json2.js from http www.JSON.org json2.js into your www directory and include it here script type text javascript..
viewDidLoad and awakeFromNib timing http://stackoverflow.com/questions/6302629/viewdidload-and-awakefromnib-timing a breakpoint at super awakeFromNib and repeatedly hit F7 Step Into and to my surprise it stepped into void viewDidLoad BEFORE going to the second line inside awakeFromNib. Does anyone have a clue what is going on here I did the exact same thing in..
how to display UIActivityIndicatorView BEFORE rotation begins http://stackoverflow.com/questions/7041261/how-to-display-uiactivityindicatorview-before-rotation-begins to display UIActivityIndicatorView BEFORE rotation begins I'd like to display an activity indicator BEFORE the work undertaken by willAnimateRotationToInterfaceOrientation.. to display UIActivityIndicatorView BEFORE rotation begins I'd like to display an activity indicator BEFORE the work undertaken by willAnimateRotationToInterfaceOrientation duration begins. Most of the time in my app this work is..
How can I tell When a UITableView animation has finished? http://stackoverflow.com/questions/7198633/how-can-i-tell-when-a-uitableview-animation-has-finished while the other rows get UITableViewCellEditingStyleDelete. And with the above code the editing style gets set BEFORE the row is added. Therefore the second row ends up with UITableViewCellEditingStyleInsert. iphone uitableview share improve..
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