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2014/10/15 ¤U¤È 10:08:30
iphone Programming Glossary: evenHow to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see for..
How to programmatically send SMS on the iPhone? http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone If you sign up now you'll get 3 200 RB points Apple has restrictions for automated or even partially automated SMS and dialing operations. Imagine if the game instead dialed 911 at a particular.. your application to stay open and allows you to populate both the to and the body fields. You can even specify multiple recipients. This prevents applications from sending automated SMS without the user.. you to populate both the to and the body fields. You can even specify multiple recipients. This prevents applications from sending automated SMS without the user explicitly aware of it. You still cannot..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone share improve this question In 3.0 there's now an easier way hook into the new motion events. The main trick is that you need to have some UIView not UIViewController that you want as firstResponder.. need to have some UIView not UIViewController that you want as firstResponder to receive the shake event messages. Here's the code that you can use in any UIView to get shake events @implementation ShakingView.. to receive the shake event messages. Here's the code that you can use in any UIView to get shake events @implementation ShakingView void motionEnded UIEventSubtype motion withEvent UIEvent event if event.subtype..
This class is not key value coding-compliant for the key http://stackoverflow.com/questions/3088059/this-class-is-not-key-value-coding-compliant-for-the-key to have names like string in Objective C. It invites a runtime naming collision. Avoid them even in once off practice apps. Naming collisions can be very hard to track down and you don't want to waste..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received errors when running on the device. The best way to track these things down and a good idea anyway even if there are no apparent problems is to run the app in the Instruments tool especially with the Leaks..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework in split complex form with odd reals stored on the imaginary side of the split complex form and even reals in stored on the real side. this is probably the hardest thing to understand. We are using the..
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 would expect from a good PDF viewer. You can draw a PDF page to a CALayer or to a UIImage . Apple even have sample code to show how draw a large PDF in a Zoomable UIScrollview But the same issues keep cropping.. as a Layer approach. The CPU and memory hit on generating the UIImages from a PDFcontext limits prevents using it to create a real time render of new zoom levels. CATiledLayer Method Theres a significant.. Overhead time drawing a full PDF page to a CALayer individual tiles can be seen rendering even with a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers techniques http cocoawithlove.com 2008 06 five approaches to listening observing.html Method #5 even indicates delegates as an method Except.... objects can only set one delegate at a time. So when I have..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root like to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar controller..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop Resize then Crop I've been bashing my face into this one for literally days now and even though I feel constantly that I am right on the edge of revelation I simply cannot achieve my goal...
What's the easiest way to resize/optimize an image size with the iPhone SDK? http://stackoverflow.com/questions/612131/whats-the-easiest-way-to-resize-optimize-an-image-size-with-the-iphone-sdk are pretty big in size widths larger than 500 pixels for instance . Since the iPhone doesn't even have a big enough display to show the image in its original size I'm planning on resizing the image..
Objective C HTML escape/unescape http://stackoverflow.com/questions/659602/objective-c-html-escape-unescape Which returns span Foo span Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the like. Is there any methods in Cocoa Touch UIKit to do this iphone html..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature for another day or two. Bounty ends in 21 hours it'll go to whoever makes the most effort to help even if the answer isn't really useful in my case. A curious observation Modified the category implementation..
http://stackoverflow.com/questions/675433/custom-colors-in-uitabbar like everyone to use the same blue and gray tab bars but is there any way to customize this Second even I were to create my own TabBar like view controller along with custom images would this violate Apple's..
UIDevice uniqueIdentifier Deprecated - What To Do Now? http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now MAC of the same interface of course. I guess the best bet is with en0 . The MAC is always present even if the interface has no IP is down. Edit 2 As was pointed out by others the preferred solution since.. MAC as UUID create a hash using the MAC . That hash will always create the same result every time even across reinstalls and apps if the hashing is done in the same way . Anyways nowadays 2013 this isn't..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown enabled that it can't retain and release the object value that's returned from methodForSelector even though you don't want to use it. From the compiler's perspective it is an object after all. That means.. allows for declaring consumed parameters and if the method consumes the parameter you'll probably eventually send a message to a zombie and crash. There are ways to work around this with bridged casting..
How can an iPhone access another non-iPhone device over wireless or Bluetooth? http://stackoverflow.com/questions/1065459/how-can-an-iphone-access-another-non-iphone-device-over-wireless-or-bluetooth connect to any Bonjour device Does it have to have a Wi Fi connection or can it use Bluetooth Even if I could use Bluetooth to connect to another device it won't be available on first generation iPhones.. Accessory framework in iPhone OS 3.0 is if they are in the Made for iPod accessory program. Even though they communicate through standard Bluetooth connections accessories need special hardware in..
How to make a UITextField move up when keyboard is present http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present needs to function as normal. Edit I am adding the scroll bar just for when the keyboard comes up. Even though it's not needed I feel like it provides a better interface because then the user can scroll and..
How to change the device orientation programmatically in iOS 6 http://stackoverflow.com/questions/12650137/how-to-change-the-device-orientation-programmatically-in-ios-6 perfect in iOS 5 just know that shouldAutorotateToInterfaceOrientation is not supported anymore. Even though it may work well with Xcode 4 to 4.3 it will NOT work on Xcode 4.5. Apple provides a new method..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone with it. It also provides some very significant performance benefits particularly on the iPhone. Even though it seems counterintuitive given how much overhead you'd think the framework has in most cases..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention class variables and as another responder noted to avoid conflict with incoming parameter names. Even in Apple sample code the use is mixed. However I greatly prefer to not use the _ prefix and have two..
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 can open. For a list of system defined UTIs see Apple's Uniform Type Identifiers Reference . Even more detail on UTIs can be found in Apple's Uniform Type Identifiers Overview . Those guides reside..
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 prepared ahead of time rendered off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now for experts. The Bizarre Problem That Arises.............................................. Even though a number of the methods work they don't actually work because there is a bizarre progressive..
How to dismiss keyboard for UITextView with return key? http://stackoverflow.com/questions/703754/how-to-dismiss-keyboard-for-uitextview-with-return-key the return and hiding the keyboard for a UITextView does not follow the interface guidelines. Even then if you want to do this implement the textView shouldChangeTextInRange replacementText method of..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample app sandbox and into a private local directory so that it can be monitored by the iCloud daemon. Even though the file is no longer in your sandbox your app still has full access to it. Although a copy of..
How to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk connection on the iPhone using the Cocoa Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see for a response from some other websites if Google didn't respond..
How to programmatically send SMS on the iPhone? http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone new game It roxxers my boxxers and yours will be too roxxersboxxers.com If you sign up now you'll get 3 200 RB points Apple has restrictions for automated or even partially automated SMS and dialing operations. Imagine if the game instead dialed 911 at a particular time of day Your best bet is to setup an intermediate server.. controller. Unlike using the sms ... url format this allows your application to stay open and allows you to populate both the to and the body fields. You can even specify multiple recipients. This prevents applications from sending automated SMS without the user explicitly aware of it. You still cannot send fully automated.. format this allows your application to stay open and allows you to populate both the to and the body fields. You can even specify multiple recipients. This prevents applications from sending automated SMS without the user explicitly aware of it. You still cannot send fully automated SMS from the iPhone itself it requires..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone how to detect this iphone ios accelerometer shake motion detection share improve this question In 3.0 there's now an easier way hook into the new motion events. The main trick is that you need to have some UIView not UIViewController that you want as firstResponder to receive the shake event messages. Here's the code.. hook into the new motion events. The main trick is that you need to have some UIView not UIViewController that you want as firstResponder to receive the shake event messages. Here's the code that you can use in any UIView to get shake events @implementation ShakingView void motionEnded UIEventSubtype motion withEvent UIEvent.. UIView not UIViewController that you want as firstResponder to receive the shake event messages. Here's the code that you can use in any UIView to get shake events @implementation ShakingView void motionEnded UIEventSubtype motion withEvent UIEvent event if event.subtype UIEventSubtypeMotionShake Put in code here to handle..
This class is not key value coding-compliant for the key http://stackoverflow.com/questions/3088059/this-class-is-not-key-value-coding-compliant-for-the-key
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework Look at the documentation on vDSP_fft_zrip Real data is stored in split complex form with odd reals stored on the imaginary side of the split complex form and even reals in stored on the real side. this is probably the hardest thing to understand. We are using the same container A all the way through the process. so in the..
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 this cant give the performance and functionality that you would expect from a good PDF viewer. You can draw a PDF page to a CALayer or to a UIImage . Apple even have sample code to show how draw a large PDF in a Zoomable UIScrollview But the same issues keep cropping up. UIImage Method PDF's in a UIImage don't optically.. Method PDF's in a UIImage don't optically scale as well as a Layer approach. The CPU and memory hit on generating the UIImages from a PDFcontext limits prevents using it to create a real time render of new zoom levels. CATiledLayer Method Theres a significant Overhead time drawing a full PDF page to a CALayer individual.. render of new zoom levels. CATiledLayer Method Theres a significant Overhead time drawing a full PDF page to a CALayer individual tiles can be seen rendering even with a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the memory..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers talking about the various methods of Observing Notification techniques http cocoawithlove.com 2008 06 five approaches to listening observing.html Method #5 even indicates delegates as an method Except.... objects can only set one delegate at a time. So when I have multiple viewcontroller communication what am I to do Ok..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root It cannot be an instance of tab bar controller. I would like to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar controller as the main controller with each of the tabs containing separate..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop Resize then Crop I've been bashing my face into this one for literally days now and even though I feel constantly that I am right on the edge of revelation I simply cannot achieve my goal. I thought ahead of time in the conceptual phases of my design..
What's the easiest way to resize/optimize an image size with the iPhone SDK? http://stackoverflow.com/questions/612131/whats-the-easiest-way-to-resize-optimize-an-image-size-with-the-iphone-sdk and saving them to the local iPhone disk. Some of those images are pretty big in size widths larger than 500 pixels for instance . Since the iPhone doesn't even have a big enough display to show the image in its original size I'm planning on resizing the image to something a bit smaller to save on space performance. Also..
Objective C HTML escape/unescape http://stackoverflow.com/questions/659602/objective-c-html-escape-unescape NSString string @ lt span gt Foo lt span gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the like. Is there any methods in Cocoa Touch UIKit to do this iphone html objective c cocoa touch escaping share improve this question..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature any applicable replies yet I'll extend the bounty deadline for another day or two. Bounty ends in 21 hours it'll go to whoever makes the most effort to help even if the answer isn't really useful in my case. A curious observation Modified the category implementation slightly #import NSDateFormatter Locale.h @implementation..
http://stackoverflow.com/questions/675433/custom-colors-in-uitabbar background images in a UITabBar I realize that Apple would like everyone to use the same blue and gray tab bars but is there any way to customize this Second even I were to create my own TabBar like view controller along with custom images would this violate Apple's Human Interface Guidelines iphone objective c share improve..
UIDevice uniqueIdentifier Deprecated - What To Do Now? http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now MAC and use that as UUID. Edit One needs to always query the MAC of the same interface of course. I guess the best bet is with en0 . The MAC is always present even if the interface has no IP is down. Edit 2 As was pointed out by others the preferred solution since iOS 6 is UIDevice identifierForVendor . In most cases you should.. point doesn't get lost in the comment noise do not use the MAC as UUID create a hash using the MAC . That hash will always create the same result every time even across reinstalls and apps if the hashing is done in the same way . Anyways nowadays 2013 this isn't necessary any more except if you need a stable device identifier..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown assigned to local variables. There's no reason that with ARC enabled that it can't retain and release the object value that's returned from methodForSelector even though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method you're calling someMethod is returning.. with not declaring how that method consumes parameters. ARC allows for declaring consumed parameters and if the method consumes the parameter you'll probably eventually send a message to a zombie and crash. There are ways to work around this with bridged casting but really it'd be better to simply use the IMP and function..
How can an iPhone access another non-iPhone device over wireless or Bluetooth? http://stackoverflow.com/questions/1065459/how-can-an-iphone-access-another-non-iphone-device-over-wireless-or-bluetooth talks about connecting to Bonjour devices but can an iPhone connect to any Bonjour device Does it have to have a Wi Fi connection or can it use Bluetooth Even if I could use Bluetooth to connect to another device it won't be available on first generation iPhones and iTouches I believe. Is that correct I'm thinking of.. way to communicate with other Bluetooth devices via the External Accessory framework in iPhone OS 3.0 is if they are in the Made for iPod accessory program. Even though they communicate through standard Bluetooth connections accessories need special hardware in order to process the data stream coming from the iPhone iPod..
How to make a UITextField move up when keyboard is present http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present I'm working with is brought up by a tabbar UITabBar which needs to function as normal. Edit I am adding the scroll bar just for when the keyboard comes up. Even though it's not needed I feel like it provides a better interface because then the user can scroll and change textboxes for example. I've got it working where I..
How to change the device orientation programmatically in iOS 6 http://stackoverflow.com/questions/12650137/how-to-change-the-device-orientation-programmatically-in-ios-6 wondering why is your view controller messed up in iOS 6 and perfect in iOS 5 just know that shouldAutorotateToInterfaceOrientation is not supported anymore. Even though it may work well with Xcode 4 to 4.3 it will NOT work on Xcode 4.5. Apple provides a new method to get this thing done in a much cleaner fashion. You use..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone object models. You get undo redo support almost for free with it. It also provides some very significant performance benefits particularly on the iPhone. Even though it seems counterintuitive given how much overhead you'd think the framework has in most cases you can beat the performance of hand tuned SQLite using Core..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention this. Some people like to use it for clarity to separate out class variables and as another responder noted to avoid conflict with incoming parameter names. Even in Apple sample code the use is mixed. However I greatly prefer to not use the _ prefix and have two strong reasons 1 Some people think the _ is a good indicator..
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 an array of Uniform Type Identifiers UTIs that your application can open. For a list of system defined UTIs see Apple's Uniform Type Identifiers Reference . Even more detail on UTIs can be found in Apple's Uniform Type Identifiers Overview . Those guides reside in the Mac developer center because this capability has been..
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 seen rendering even with a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering a UIImage of a page in a separate thread..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now the run loop and as many pointed out this approach is strictly for experts. The Bizarre Problem That Arises.............................................. Even though a number of the methods work they don't actually work because there is a bizarre progressive slow down artifact you will see clearly in the demo. Scroll..
How to dismiss keyboard for UITextView with return key? http://stackoverflow.com/questions/703754/how-to-dismiss-keyboard-for-uitextview-with-return-key be able to add only one line of text use a UITextField . Hitting the return and hiding the keyboard for a UITextView does not follow the interface guidelines. Even then if you want to do this implement the textView shouldChangeTextInRange replacementText method of UITextViewDelegate and in that check if the replacement text..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample directory to iCloud the system copies that item out of your app sandbox and into a private local directory so that it can be monitored by the iCloud daemon. Even though the file is no longer in your sandbox your app still has full access to it. Although a copy of the file remains local to the current device the file is also..
How to check for an active Internet Connection on iPhone SDK? http://stackoverflow.com/questions/1083701/how-to-check-for-an-active-internet-connection-on-iphone-sdk Touch libraries. I came up with a way to do this using an NSURL . The way I did it seems a bit unreliable because even Google could one day be down and relying on a 3rd party seems bad and while I could check to see for a response from some..
How to programmatically send SMS on the iPhone? http://stackoverflow.com/questions/10848/how-to-programmatically-send-sms-on-the-iphone will be too roxxersboxxers.com If you sign up now you'll get 3 200 RB points Apple has restrictions for automated or even partially automated SMS and dialing operations. Imagine if the game instead dialed 911 at a particular time of day Your.. format this allows your application to stay open and allows you to populate both the to and the body fields. You can even specify multiple recipients. This prevents applications from sending automated SMS without the user explicitly aware of.. stay open and allows you to populate both the to and the body fields. You can even specify multiple recipients. This prevents applications from sending automated SMS without the user explicitly aware of it. You still cannot send fully automated..
How do I detect when someone shakes an iPhone? http://stackoverflow.com/questions/150446/how-do-i-detect-when-someone-shakes-an-iphone shake motion detection share improve this question In 3.0 there's now an easier way hook into the new motion events. The main trick is that you need to have some UIView not UIViewController that you want as firstResponder to receive the.. trick is that you need to have some UIView not UIViewController that you want as firstResponder to receive the shake event messages. Here's the code that you can use in any UIView to get shake events @implementation ShakingView void motionEnded.. as firstResponder to receive the shake event messages. Here's the code that you can use in any UIView to get shake events @implementation ShakingView void motionEnded UIEventSubtype motion withEvent UIEvent event if event.subtype UIEventSubtypeMotionShake..
This class is not key value coding-compliant for the key http://stackoverflow.com/questions/3088059/this-class-is-not-key-value-coding-compliant-for-the-key the way it is bad practice to have names like string in Objective C. It invites a runtime naming collision. Avoid them even in once off practice apps. Naming collisions can be very hard to track down and you don't want to waste the time. share..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received up as bad access errors when running on the device. The best way to track these things down and a good idea anyway even if there are no apparent problems is to run the app in the Instruments tool especially with the Leaks option. share improve..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework Real data is stored in split complex form with odd reals stored on the imaginary side of the split complex form and even reals in stored on the real side. this is probably the hardest thing to understand. We are using the same container A all..
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 that you would expect from a good PDF viewer. You can draw a PDF page to a CALayer or to a UIImage . Apple even have sample code to show how draw a large PDF in a Zoomable UIScrollview But the same issues keep cropping up. UIImage Method.. scale as well as a Layer approach. The CPU and memory hit on generating the UIImages from a PDFcontext limits prevents using it to create a real time render of new zoom levels. CATiledLayer Method Theres a significant Overhead time drawing.. Method Theres a significant Overhead time drawing a full PDF page to a CALayer individual tiles can be seen rendering even with a tileSize tweak CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers are pretty heavy..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers Observing Notification techniques http cocoawithlove.com 2008 06 five approaches to listening observing.html Method #5 even indicates delegates as an method Except.... objects can only set one delegate at a time. So when I have multiple viewcontroller..
Tab bar controller inside a navigation controller, or sharing a navigation root view http://stackoverflow.com/questions/576764/tab-bar-controller-inside-a-navigation-controller-or-sharing-a-navigation-root controller. I would like to avoid private APIs and the like but I'm not sure why this usage is explicitly prohibited even when it seems to work fine. Anyone know the reason I've thought about putting the tab bar controller as the main controller..
http://stackoverflow.com/questions/603907/uiimage-resize-then-crop Resize then Crop I've been bashing my face into this one for literally days now and even though I feel constantly that I am right on the edge of revelation I simply cannot achieve my goal. I thought ahead of time..
What's the easiest way to resize/optimize an image size with the iPhone SDK? http://stackoverflow.com/questions/612131/whats-the-easiest-way-to-resize-optimize-an-image-size-with-the-iphone-sdk Some of those images are pretty big in size widths larger than 500 pixels for instance . Since the iPhone doesn't even have a big enough display to show the image in its original size I'm planning on resizing the image to something a bit smaller..
Objective C HTML escape/unescape http://stackoverflow.com/questions/659602/objective-c-html-escape-unescape gt string stringByUnescapingHTML Which returns span Foo span Hopefully unescaping all other HTML entities as well and even ASCII codes like Ӓ and the like. Is there any methods in Cocoa Touch UIKit to do this iphone html objective c cocoa..
What is the best way to deal with the NSDateFormatter locale “feature”? http://stackoverflow.com/questions/6613110/what-is-the-best-way-to-deal-with-the-nsdateformatter-locale-feature the bounty deadline for another day or two. Bounty ends in 21 hours it'll go to whoever makes the most effort to help even if the answer isn't really useful in my case. A curious observation Modified the category implementation slightly #import..
http://stackoverflow.com/questions/675433/custom-colors-in-uitabbar that Apple would like everyone to use the same blue and gray tab bars but is there any way to customize this Second even I were to create my own TabBar like view controller along with custom images would this violate Apple's Human Interface..
UIDevice uniqueIdentifier Deprecated - What To Do Now? http://stackoverflow.com/questions/6993325/uidevice-uniqueidentifier-deprecated-what-to-do-now to always query the MAC of the same interface of course. I guess the best bet is with en0 . The MAC is always present even if the interface has no IP is down. Edit 2 As was pointed out by others the preferred solution since iOS 6 is UIDevice identifierForVendor.. noise do not use the MAC as UUID create a hash using the MAC . That hash will always create the same result every time even across reinstalls and apps if the hashing is done in the same way . Anyways nowadays 2013 this isn't necessary any more..
performSelector may cause a leak because its selector is unknown http://stackoverflow.com/questions/7017281/performselector-may-cause-a-leak-because-its-selector-is-unknown reason that with ARC enabled that it can't retain and release the object value that's returned from methodForSelector even though you don't want to use it. From the compiler's perspective it is an object after all. That means that if the method.. parameters. ARC allows for declaring consumed parameters and if the method consumes the parameter you'll probably eventually send a message to a zombie and crash. There are ways to work around this with bridged casting but really it'd be better..
How can an iPhone access another non-iPhone device over wireless or Bluetooth? http://stackoverflow.com/questions/1065459/how-can-an-iphone-access-another-non-iphone-device-over-wireless-or-bluetooth but can an iPhone connect to any Bonjour device Does it have to have a Wi Fi connection or can it use Bluetooth Even if I could use Bluetooth to connect to another device it won't be available on first generation iPhones and iTouches I believe... devices via the External Accessory framework in iPhone OS 3.0 is if they are in the Made for iPod accessory program. Even though they communicate through standard Bluetooth connections accessories need special hardware in order to process the..
How does the iOS app Display Recorder record the screen without using private API? http://stackoverflow.com/questions/11090184/how-does-the-ios-app-display-recorder-record-the-screen-without-using-private-ap happening when the app runs in the background short of some key pieces of functionality like audio playing etc . Even if the developer tapped into private API libraries to accomplish this how were they able to do this in a way that wasn't.. use to hide their app's behavior from static analysis. No reviewing process is perfect but they can do pretty well. Even if Apple automatically refuses apps that link against the dlsym symbol there are methods that can be used to bypass detection...
How to make a UITextField move up when keyboard is present http://stackoverflow.com/questions/1126726/how-to-make-a-uitextfield-move-up-when-keyboard-is-present UITabBar which needs to function as normal. Edit I am adding the scroll bar just for when the keyboard comes up. Even though it's not needed I feel like it provides a better interface because then the user can scroll and change textboxes..
Is it possible to reset the privacy settings in iOS 6? [closed] http://stackoverflow.com/questions/12596165/is-it-possible-to-reset-the-privacy-settings-in-ios-6
How to change the device orientation programmatically in iOS 6 http://stackoverflow.com/questions/12650137/how-to-change-the-device-orientation-programmatically-in-ios-6 up in iOS 6 and perfect in iOS 5 just know that shouldAutorotateToInterfaceOrientation is not supported anymore. Even though it may work well with Xcode 4 to 4.3 it will NOT work on Xcode 4.5. Apple provides a new method to get this thing..
Use CoreData or SQLite on iPhone? [closed] http://stackoverflow.com/questions/1318467/use-coredata-or-sqlite-on-iphone almost for free with it. It also provides some very significant performance benefits particularly on the iPhone. Even though it seems counterintuitive given how much overhead you'd think the framework has in most cases you can beat the performance..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention to separate out class variables and as another responder noted to avoid conflict with incoming parameter names. Even in Apple sample code the use is mixed. However I greatly prefer to not use the _ prefix and have two strong reasons 1 Some..
Localization of icon and default screen in iPhone http://stackoverflow.com/questions/2700311/localization-of-icon-and-default-screen-in-iphone and Settings icon Icon Settings.png by placing files with the same name in your language specific project directories. Even if you provide localized versions however you should always include a default version of these files at the top level of..
Showing login view controller before main tab bar controller http://stackoverflow.com/questions/2716755/showing-login-view-controller-before-main-tab-bar-controller MAIN QUESTION Is this the right way to show a view controller before the app's main tab bar controller is displayed Even though it seems to work is it a proper way to do it If I comment out the lvc release in the app delegate then the app crashes..
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 that your application can open. For a list of system defined UTIs see Apple's Uniform Type Identifiers Reference . Even more detail on UTIs can be found in Apple's Uniform Type Identifiers Overview . Those guides reside in the Mac developer..
How To Create A Gallery on iOS http://stackoverflow.com/questions/3866766/how-to-create-a-gallery-on-ios ios share improve this question You should check out AQGridView which does exactly what you are trying to achieve. Even if you want to write your own custom code have a look at the AQGridView source as more than likely you will need to use..
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 CALayers cant be prepared ahead of time rendered off screen . Generally PDF viewers are pretty heavy on memory too. Even monitor the memory usage of apple's zoomable PDF example. In my current project I'm developing a PDF viewer and am rendering..
Is there a way to make drawRect work right NOW? http://stackoverflow.com/questions/4739748/is-there-a-way-to-make-drawrect-work-right-now this approach is strictly for experts. The Bizarre Problem That Arises.............................................. Even though a number of the methods work they don't actually work because there is a bizarre progressive slow down artifact you..
Creating a JSON Store For iPhone http://stackoverflow.com/questions/5237943/creating-a-json-store-for-iphone don't confuse I understand SQL thoroughly but not Core Data with Core Data has a high overhead. It really doesn't. Even when Core Data isn't the cheapest way to get data in and out of persistence it's integration with the rest of the API usually..
What are the Dangers of Method Swizzling in Objective C? http://stackoverflow.com/questions/5339276/what-are-the-dangers-of-method-swizzling-in-objective-c Dangers of Method Swizzling in Objective C I have heard people state that method swizzling is a dangerous practice. Even the name swizzling sugests that it is a bit of a cheat. Method Swizzling is modifying the mapping so that calling selector..
How to dismiss keyboard for UITextView with return key? http://stackoverflow.com/questions/703754/how-to-dismiss-keyboard-for-uitextview-with-return-key a UITextField . Hitting the return and hiding the keyboard for a UITextView does not follow the interface guidelines. Even then if you want to do this implement the textView shouldChangeTextInRange replacementText method of UITextViewDelegate..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample that item out of your app sandbox and into a private local directory so that it can be monitored by the iCloud daemon. Even though the file is no longer in your sandbox your app still has full access to it. Although a copy of the file remains local..
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