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2014/10/15 ¤U¤È 10:15:40
iphone Programming Glossary: usuallyDetermining if an iPhone is Jail broken Programatically http://stackoverflow.com/questions/1140856/determining-if-an-iphone-is-jail-broken-programatically app was cracked http thwart ipa cracks.blogspot.com 2008 11 detection.html In short the cracking usually requires changing the Info.plist. Since it's regular file you have access to it's pretty easy to determine..
When should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc ensures they will be deallocated as well to free memory. The objects that you release here are usually recreated and set again when the UIViewController's view is re loaded either from a Nib or through an..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking to verify that we were giving away items that actually pertained to the movie. According to their usually vague agreement you aren't allowed to have sweepstakes otherwise. I would also think this adheres more..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th before a view controller loads. Instead you hardwire the app to start in a particular orientation usually portrait and then immediately rotate. See mobile Safari. It always starts in portrait and then rotates..
How to intercept click on link in UITextView? http://stackoverflow.com/questions/2543967/how-to-intercept-click-on-link-in-uitextview locate the file main.m in your project. In this small file that bootstraps your app there is usually this line int retVal UIApplicationMain argc argv nil nil The third parameter is the class name for your..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received rules unless you make a big point of it. Remember anything you get from an allocation function usually the static alloc method but there are a few others or a copy method you own the memory too and must..
http://stackoverflow.com/questions/3339722/check-iphone-ios-version should avoid relying on the version string as an indication of device or OS capabilities. There is usually a more reliable method of checking whether a particular feature or class is available. For example you..
Get PDF hyperlinks on iOS with Quartz http://stackoverflow.com/questions/4080373/get-pdf-hyperlinks-on-ios-with-quartz PDF reader this same question has been asked multiple times here with no real practical answers. I usually never ask for sample code directly but apparently this time I really need it... anyone got this working..
iVar property, access via self? http://stackoverflow.com/questions/4088801/ivar-property-access-via-self @property nonatomic retain NSMutableArray foundList @end . self foundList addObject eachObject I usually write this ... OR foundList addObject eachObject gary. iphone objective c cocoa touch share improve..
http://stackoverflow.com/questions/412982/iphone-unzip-code share improve this question Has sample.zip really been created with gZip The .zip extension usually is used for archives created by WinZip. Those can also be decompressed using zLib but you'd have to..
http://stackoverflow.com/questions/4445173/when-to-use-nsinteger-vs-int so why use int at all iphone objective c ios types nsinteger share improve this question You usually want to use NSInteger when you don't know what kind of processor architecture your code might run on..
Where's the best SQLite 3 tutorial for iPhone-SDK? [closed] http://stackoverflow.com/questions/716839/wheres-the-best-sqlite-3-tutorial-for-iphone-sdk on any other platform. You should read the general SQLite documentation . In your iPhone app you usually open your SQLite database in the applicationDidFinishLaunching method of your application delegate...
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample code sample closed As a beginner I'm struggling with iCloud. There are some samples but they are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple..
Having trouble adding objects to NSMutableArray in Objective C http://stackoverflow.com/questions/851926/having-trouble-adding-objects-to-nsmutablearray-in-objective-c this question Have you initialized your viewedCardsArray If not you need to somewhere this is usually done in the init method for your class id init self super init if self viewedCardsArray NSMutableArray..
How to know the UITableview row number http://stackoverflow.com/questions/9274494/how-to-know-the-uitableview-row-number
Determining if an iPhone is Jail broken Programatically http://stackoverflow.com/questions/1140856/determining-if-an-iphone-is-jail-broken-programatically
When should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc the UIViewController's additional ownership of these objects ensures they will be deallocated as well to free memory. The objects that you release here are usually recreated and set again when the UIViewController's view is re loaded either from a Nib or through an implementation of loadView . Also note that the UIViewController's..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application you might want to use a different context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from which you retrieve a context typically at..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking approval process however we did get a personal phone call to verify that we were giving away items that actually pertained to the movie. According to their usually vague agreement you aren't allowed to have sweepstakes otherwise. I would also think this adheres more strictly to their only use things if you absolutely need..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th by the system. As such you cannot easily detect orientation before a view controller loads. Instead you hardwire the app to start in a particular orientation usually portrait and then immediately rotate. See mobile Safari. It always starts in portrait and then rotates to landscape. These are the two methods I used to swap out..
How to intercept click on link in UITextView? http://stackoverflow.com/questions/2543967/how-to-intercept-click-on-link-in-uitextview the application start with your new subclass of UIApplication locate the file main.m in your project. In this small file that bootstraps your app there is usually this line int retVal UIApplicationMain argc argv nil nil The third parameter is the class name for your application. So replacing this line for int retVal UIApplicationMain..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received 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 method but there are a few others or a copy method you own the memory too and must release it when you are done. But if you get something back..
http://stackoverflow.com/questions/3339722/check-iphone-ios-version using UIDevice currentDevice systemVersion However you should avoid relying on the version string as an indication of device or OS capabilities. There is usually a more reliable method of checking whether a particular feature or class is available. For example you can check if UIPopoverController is available on the current..
Get PDF hyperlinks on iOS with Quartz http://stackoverflow.com/questions/4080373/get-pdf-hyperlinks-on-ios-with-quartz dictionary... You know this is a feature I see on every PDF reader this same question has been asked multiple times here with no real practical answers. I usually never ask for sample code directly but apparently this time I really need it... anyone got this working possibly with sample code Update I just realized the guy..
iVar property, access via self? http://stackoverflow.com/questions/4088801/ivar-property-access-via-self CustomController UIViewController NSMutableArray foundList @property nonatomic retain NSMutableArray foundList @end . self foundList addObject eachObject I usually write this ... OR foundList addObject eachObject gary. iphone objective c cocoa touch share improve this question If you have a defined property for an ivar..
http://stackoverflow.com/questions/412982/iphone-unzip-code data else fclose dest gzclose file iphone compression zip share improve this question Has sample.zip really been created with gZip The .zip extension usually is used for archives created by WinZip. Those can also be decompressed using zLib but you'd have to parse the header and use other routines. To check have a look..
http://stackoverflow.com/questions/4445173/when-to-use-nsinteger-vs-int an integer in either a 64 bit or 32 bit environment so why use int at all iphone objective c ios types nsinteger share improve this question You usually want to use NSInteger when you don't know what kind of processor architecture your code might run on so you may for some reason want the largest possible int type..
Where's the best SQLite 3 tutorial for iPhone-SDK? [closed] http://stackoverflow.com/questions/716839/wheres-the-best-sqlite-3-tutorial-for-iphone-sdk 3 on the iPhone is really not that different from using it on any other platform. You should read the general SQLite documentation . In your iPhone app you usually open your SQLite database in the applicationDidFinishLaunching method of your application delegate. After that you can just use your database. I've used Gus Mueller's..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample basics and code sample closed As a beginner I'm struggling with iCloud. There are some samples but they are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs are OK but I still can't see the big picture. So please..
Having trouble adding objects to NSMutableArray in Objective C http://stackoverflow.com/questions/851926/having-trouble-adding-objects-to-nsmutablearray-in-objective-c advance objective c iphone cocoa cocoa touch share improve this question Have you initialized your viewedCardsArray If not you need to somewhere this is usually done in the init method for your class id init self super init if self viewedCardsArray NSMutableArray alloc init return self Then it is released in the dealloc..
How to know the UITableview row number http://stackoverflow.com/questions/9274494/how-to-know-the-uitableview-row-number
Determining if an iPhone is Jail broken Programatically http://stackoverflow.com/questions/1140856/determining-if-an-iphone-is-jail-broken-programatically to detect if your app was cracked http thwart ipa cracks.blogspot.com 2008 11 detection.html In short the cracking usually requires changing the Info.plist. Since it's regular file you have access to it's pretty easy to determine such changes...
When should I release objects in -(void)viewDidUnload rather than in -dealloc? http://stackoverflow.com/questions/1158788/when-should-i-release-objects-in-voidviewdidunload-rather-than-in-dealloc of these objects ensures they will be deallocated as well to free memory. The objects that you release here are usually recreated and set again when the UIViewController's view is re loaded either from a Nib or through an implementation of..
Where to place the “Core Data Stack” in a Cocoa/Cocoa Touch application http://stackoverflow.com/questions/1267520/where-to-place-the-core-data-stack-in-a-cocoa-cocoa-touch-application context to perform a discrete set of actions. The appropriate unit of currency for a view controller is therefore usually a managed object context otherwise a managed object. Using and passing a singleton object that manages a stack and from..
http://stackoverflow.com/questions/1861656/iphone-reachability-checking personal phone call to verify that we were giving away items that actually pertained to the movie. According to their usually vague agreement you aren't allowed to have sweepstakes otherwise. I would also think this adheres more strictly to their..
http://stackoverflow.com/questions/2496554/easiest-way-to-support-multiple-orientations-how-do-i-load-a-custom-nib-when-th detect orientation before a view controller loads. Instead you hardwire the app to start in a particular orientation usually portrait and then immediately rotate. See mobile Safari. It always starts in portrait and then rotates to landscape. These..
How to intercept click on link in UITextView? http://stackoverflow.com/questions/2543967/how-to-intercept-click-on-link-in-uitextview subclass of UIApplication locate the file main.m in your project. In this small file that bootstraps your app there is usually this line int retVal UIApplicationMain argc argv nil nil The third parameter is the class name for your application. So..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received the memory management rules unless you make a big point of it. Remember anything you get from an allocation function usually the static alloc method but there are a few others or a copy method you own the memory too and must release it when you..
http://stackoverflow.com/questions/3339722/check-iphone-ios-version However you should avoid relying on the version string as an indication of device or OS capabilities. There is usually a more reliable method of checking whether a particular feature or class is available. For example you can check if UIPopoverController..
Get PDF hyperlinks on iOS with Quartz http://stackoverflow.com/questions/4080373/get-pdf-hyperlinks-on-ios-with-quartz I see on every PDF reader this same question has been asked multiple times here with no real practical answers. I usually never ask for sample code directly but apparently this time I really need it... anyone got this working possibly with sample..
iVar property, access via self? http://stackoverflow.com/questions/4088801/ivar-property-access-via-self foundList @property nonatomic retain NSMutableArray foundList @end . self foundList addObject eachObject I usually write this ... OR foundList addObject eachObject gary. iphone objective c cocoa touch share improve this question If..
http://stackoverflow.com/questions/412982/iphone-unzip-code iphone compression zip share improve this question Has sample.zip really been created with gZip The .zip extension usually is used for archives created by WinZip. Those can also be decompressed using zLib but you'd have to parse the header and..
http://stackoverflow.com/questions/4445173/when-to-use-nsinteger-vs-int 32 bit environment so why use int at all iphone objective c ios types nsinteger share improve this question You usually want to use NSInteger when you don't know what kind of processor architecture your code might run on so you may for some..
Creating a JSON Store For iPhone http://stackoverflow.com/questions/5237943/creating-a-json-store-for-iphone and therefore not cached locally for very long . The JSON is deeply hierarchal with tons of nested objects . Documents usually contain no more than 20 top level items but could be up to 100K. I don't think I want to create a Core Data model with 100's.. 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 produces superior results when you factor in speed of development and reliability. In this particular case I can't tell..
http://stackoverflow.com/questions/5360846/suspend-the-application or sending it to the background programmatically is a violation of the iOS Human Interface Guidelines which usually doesn't bode well for getting through the review process Don ™t Quit Programmatically Never quit an iOS application programmatically.. and control actions. Although an application can suggest a course of action or warn about dangerous consequences it ™s usually a mistake for the app to take decision making away from the user. The best apps find the correct balance between giving..
Is it possible to reference a variable with a string and an int? http://stackoverflow.com/questions/6049175/is-it-possible-to-reference-a-variable-with-a-string-and-an-int
Where's the best SQLite 3 tutorial for iPhone-SDK? [closed] http://stackoverflow.com/questions/716839/wheres-the-best-sqlite-3-tutorial-for-iphone-sdk from using it on any other platform. You should read the general SQLite documentation . In your iPhone app you usually open your SQLite database in the applicationDidFinishLaunching method of your application delegate. After that you can just..
iCloud basics and code sample [closed] http://stackoverflow.com/questions/7795629/icloud-basics-and-code-sample basics and code sample closed As a beginner I'm struggling with iCloud. There are some samples but they are usually quite detailed on the developer forum there is one for iCloud and CoreData which is massive . The apple docs are OK but..
Having trouble adding objects to NSMutableArray in Objective C http://stackoverflow.com/questions/851926/having-trouble-adding-objects-to-nsmutablearray-in-objective-c touch share improve this question Have you initialized your viewedCardsArray If not you need to somewhere this is usually done in the init method for your class id init self super init if self viewedCardsArray NSMutableArray alloc init return..
How to know the UITableview row number http://stackoverflow.com/questions/9274494/how-to-know-the-uitableview-row-number
Enable/Disable Apple Push Notification from iPhone app? http://stackoverflow.com/questions/10493949/enable-disable-apple-push-notification-from-iphone-app the Push Notifications for your app from the app code. The dialog asking for permission is displayed only once. Usually other apps display instructions to the user to enable disable push notifications by going into Settings Notification AppName...
iPhone - Corrupt JPEG data for image received over HTTP http://stackoverflow.com/questions/1064920/iphone-corrupt-jpeg-data-for-image-received-over-http NSURLConnection connection connection release UIImage theImage UIImage imageWithData receivedData Usually it works just fine but sometimes I'm seeing this get logged Corrupt JPEG data premature end of data segment At this point..
UISearchDisplayController with no results tableView? http://stackoverflow.com/questions/1214185/uisearchdisplaycontroller-with-no-results-tableview with no results tableView Usually a UISearchDisplayController when activated dims the tableView and focuses the searchBar. As soon as you enter text into.. The searchDisplayController's delegate gets called when this second UITableView is loaded shown hidden unloaded. Usually it shows live search results or autocompletion entries while typing. In my app I want to search a webservice and I don't..
http://stackoverflow.com/questions/12371321/where-should-i-save-data-files-i-want-to-keep-long-term-and-how-do-i-prevent have file of arbitrary type including Core Data repositories that I need to keep around and not have iOS delete them. Usually I do not want iCloud to back these files up. Where should I save them iphone objective c ios core data share improve..
Code Sign Error When Building iPhone Application http://stackoverflow.com/questions/1269646/code-sign-error-when-building-iphone-application privilege. In Xcode inside 'Edit Project Settings' you can select the certificate you wish to code sign with. Usually for debug I sign with the development certificate. Follow the instructions on the apple site and clone the release profile..
http://stackoverflow.com/questions/12768109/how-to-use-ldid signing jailbreak share improve this question 1 Using ldid S is the correct usage. Not lowercase as Lois says. 2 Usually when I get this error it's because I built my app with the wrong architectures. Most older versions of ldid that I've used..
iOS crash reports: atos not working as expected http://stackoverflow.com/questions/13574933/ios-crash-reports-atos-not-working-as-expected the first address showing in the Binary Images section at the very front of the line which contains your executable. Usually the first entry . Since in the past value of the slide was equal to value of the load address this always worked. But since..
Present and dismiss modal view controller http://stackoverflow.com/questions/1529632/present-and-dismiss-modal-view-controller It should be like this blue presentModalViewController red animated YES red dismissModalViewControllerAnimated YES Usually the red controller should decide to dismiss himself at some point maybe when a cancel button is clicked . Then the red controller..
iPhone - What are reuseIdentifiers (UITableViewCell)? http://stackoverflow.com/questions/2152180/iphone-what-are-reuseidentifiers-uitableviewcell So if a cell is going to be reused make sure it is correct for the situation. That's what reuseIdentifiers are for. Usually you will only need one. But there might be a list that uses several different kinds of cells and in that case you'd have..
Parsing XML code on iphone SDK http://stackoverflow.com/questions/3616447/parsing-xml-code-on-iphone-sdk this dynamic you can put those numbers into an array and read them out or change the way you're setting the data. Usually with different sections you use different arrays for the data. This takes your theRow variable out of the equation. Here..
How can I pop a view from a UINavigationController and replace it with another in one operation? http://stackoverflow.com/questions/410471/how-can-i-pop-a-view-from-a-uinavigationcontroller-and-replace-it-with-another-i NO self.navigationController pushViewController mevc animated YES self release I get very strange behavior. Usually the editor view will appear but if I try to use the back button on the nav bar I get extra screens some blank and some just..
How To Draw line on touch event? http://stackoverflow.com/questions/4669490/how-to-draw-line-on-touch-event objective c ios4 share improve this question You typically don't draw directly in the touch detection methods. Usually you'd just store new points lines there and draw all of them in drawRect . Let's assume you have a custom subclass of UIView..
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 is safe to use concurrently 1 . This is actually not a problem in 95 of cases that you'd want to use method swizzling. Usually you simply want to replace the implementation of a method and you want that implementation to be used for the entire lifetime..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers answers which focus on the importance of putting data in model objects when appropriate per the MVC design pattern . Usually you want to avoid putting state information inside a controller unless it's strictly presentation data. Second see page..
What are the limitations of NSUserDefaults? http://stackoverflow.com/questions/6173625/what-are-the-limitations-of-nsuserdefaults some memory so use it only you really need to save complex datas. Using NSUserDefaults to save a lot of game data Usually NSUserDefaults is used to save game settings. To save game data it's usually better to use either SQLite or you could create..
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 headers. You could end up with crashes in code that the compiler thinks is fine. This is very rare but could happen. Usually you'll just get a warning that it doesn't know which of two method signatures to choose from. 3 See the ARC reference on..
NSDefaultRunLoopMode vs NSRunLoopCommonModes http://stackoverflow.com/questions/7222449/nsdefaultrunloopmode-vs-nsrunloopcommonmodes on when delivering certain events or simply suspend this delivery and then collect them all to be delivered later. Usually all run loop are set to the default mode which establishes a default way to manage input events. As soon as some mouse dragging..
iPhone ImageMagick Library - converting from batch file script to Objective-C using MagickWand API http://stackoverflow.com/questions/7480812/iphone-imagemagick-library-converting-from-batch-file-script-to-objective-c-us It works quite well. The sample project compiles just fine but doesn't make any sense whatsoever. Usually I'll use the convert.exe that comes with ImageMagick for Windows to convert images via the command line. So I'll write a..
Could not load NIB in bundle: 'NSBundle when using storyboarding http://stackoverflow.com/questions/8689235/could-not-load-nib-in-bundle-nsbundle-when-using-storyboarding in bundle 'NSBundle when using storyboarding I am getting the following error when I use my app for a little while. Usually takes between 50 and 100 movements to cause the crash. I am not making sense of it though as I am using storyboards and..
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