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2014/10/15 ¤U¤È 10:13:13
iphone Programming Glossary: referenceHow do I record audio on iPhone with AVAudioRecorder? http://stackoverflow.com/questions/1010343/how-do-i-record-audio-on-iphone-with-avaudiorecorder shows. There are not any examples of how to best do this in the iPhone Dev Center and only reference to the classes. I am a newbie at iPhone development so I am looking for a simple sample to get me started...
UIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs is set to YES if its width is less than that of its parent view. Also the ClipView needs a reference to the UIScrollView . The final step is to override UIView hitTest withEvent inside the ClipView . UIView..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone it the method provided by previous posts and at the bottom of this post provides a read only reference to data . Method 1 Writable Pixel Information I defined constants #define RGBA 4 #define RGBA_8_BIT..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention in front of a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are..
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 You set your Base SDK to the latest version that you are compiling with ie 5.0. This way you can reference the newer definitions and symbols in your code. This article SDK and Deployment Targets discusses Deployment..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received else including factory methods e.g. NSString stringWithFormat then you'll have an autorelease reference which means it could be released at some time in the future by other code so it is vital that if you..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers methods that will be used for communicating between the viewcontroller into your app delegate and reference the viewcontroller instances in the app delegate methods. Fair 'nuff. A bit further on we get this slide.. Ok that's the set up gang. I know I can easily do my communication methods in the app delegate by reference's the multiple viewcontroller instances in my appdelegate but I want to do this sort of thing the right.. nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c ARC or assign pre ARC to avoid retain loops since the delegate of an object often holds a strong reference to that object. For example a view controller is often the delegate of a view it contains. To define..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c reference counting with Cocoa and Objective C I'm just beginning to have a look at Objective C and Cocoa with.. with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant once you understand it but I'm just.. you understand the basic concepts. In Cocoa each object keeps track of how many times it is being referenced specifically the NSObject base class implements this . By calling retain on an object you are telling..
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 about anything. I checked this a year a so ago by looking at the source but don't have a reference right now. Suppression In trying to think of a situation where suppression of this warning would be.. get a warning that it doesn't know which of two method signatures to choose from. 3 See the ARC reference on retained return values and unretained return values for more details. share improve this answer..
Difference between objectForKey and valueForKey? http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data copied from Quartz..
How do I change the Navigation Bar color in iOS 7? http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7 in iOS 7.0. It no longer affects the bar's background. From the documentation barTintColor Class Reference The tint color to apply to the navigation bar background. @property nonatomic retain UIColor barTintColor..
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 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..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain counting share improve this question It's up to you. You can write apps using ARC Automatic Reference Counting and Xcode will write glue code to allow your ARC enabled apps to run on iOS 4 no modifications..
Access the camera with iPhone SDK http://stackoverflow.com/questions/74113/access-the-camera-with-iphone-sdk respectively. see http developer.apple.com iphone library documentation UIKit Reference UIImagePickerControllerDelegate_Protocol UIImagePickerControllerDelegate UIImagePickerControllerDelegate.html..
How can I get a precise time, for example in milliseconds in Objective-C? http://stackoverflow.com/questions/889380/how-can-i-get-a-precise-time-for-example-in-milliseconds-in-objective-c
How do I record audio on iPhone with AVAudioRecorder? http://stackoverflow.com/questions/1010343/how-do-i-record-audio-on-iphone-with-avaudiorecorder and not the older way of recording like the example SpeakHere shows. There are not any examples of how to best do this in the iPhone Dev Center and only reference to the classes. I am a newbie at iPhone development so I am looking for a simple sample to get me started. Thanks in advance. iphone audio recording share improve..
UIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs center of the ClipView . Make sure the ClipView 's clipsToBounds is set to YES if its width is less than that of its parent view. Also the ClipView needs a reference to the UIScrollView . The final step is to override UIView hitTest withEvent inside the ClipView . UIView hitTest CGPoint point withEvent UIEvent event if self..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone method as it provides writable data whereas as I understand it the method provided by previous posts and at the bottom of this post provides a read only reference to data . Method 1 Writable Pixel Information I defined constants #define RGBA 4 #define RGBA_8_BIT 8 In my UIImage subclass I declared instance variables size_t..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention convention duplicate Possible Duplicate How does an underscore in front of a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in the .m file as @synthesize variable _variable..
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 the earliest version you want to be able to run with ie 3.0. You set your Base SDK to the latest version that you are compiling with ie 5.0. This way you can reference the newer definitions and symbols in your code. This article SDK and Deployment Targets discusses Deployment vs Base SDK in detail. Weak link to the libraries frameworks..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received are done. But if you get something back from just about anything else including factory methods e.g. NSString stringWithFormat then you'll have an autorelease reference which means it could be released at some time in the future by other code so it is vital that if you need to keep it around beyond the immediate function that you..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers test Ok. I'm down with that. Don't blindly toss all your methods that will be used for communicating between the viewcontroller into your app delegate and reference the viewcontroller instances in the app delegate methods. Fair 'nuff. A bit further on we get this slide telling us what we should do. Page 18 51 Best Practices.. I have multiple viewcontroller communication what am I to do Ok that's the set up gang. I know I can easily do my communication methods in the app delegate by reference's the multiple viewcontroller instances in my appdelegate but I want to do this sort of thing the right way. Please help me do the right thing by answering the.. context of the dependency injection design pattern. In a nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it needs via methods . If you follow the dependency..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c The delegate property itself is typically declared weak in ARC or assign pre ARC to avoid retain loops since the delegate of an object often holds a strong reference to that object. For example a view controller is often the delegate of a view it contains. To define your own delegates you'll have to declare their methods somewhere...
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c reference counting with Cocoa and Objective C I'm just beginning to have a look at Objective C and Cocoa with a view to playing with the iPhone SDK. I'm reasonably comfortable.. to have a look at Objective C and Cocoa with a view to playing with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant once you understand it but I'm just not over the hump yet. How do release retain and autorelease.. and release autorelease is really just a special case once you understand the basic concepts. In Cocoa each object keeps track of how many times it is being referenced specifically the NSObject base class implements this . By calling retain on an object you are telling it that you want to up its reference count by one. By calling..
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 object during compilation. It doesn't need to make any assumptions about anything. I checked this a year a so ago by looking at the source but don't have a reference right now. Suppression In trying to think of a situation where suppression of this warning would be necessary and good code design I'm coming up blank. Someone..
Difference between objectForKey and valueForKey? http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone a pixel typedef struct RGBPixel byte red byte green byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data copied from Quartz CGImage held in receiver self UInt8 pixelByteData A pointer..
How do I change the Navigation Bar color in iOS 7? http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7 question The behavior of tintColor for bars has changed in iOS 7.0. It no longer affects the bar's background. From the documentation barTintColor Class Reference The tint color to apply to the navigation bar background. @property nonatomic retain UIColor barTintColor Discussion This color is made translucent by default unless..
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 you provide 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..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain it matter iphone ios ios5 memory management automatic ref counting share improve this question It's up to you. You can write apps using ARC Automatic Reference Counting and Xcode will write glue code to allow your ARC enabled apps to run on iOS 4 no modifications required. However certain things wont work and most noticeably..
Access the camera with iPhone SDK http://stackoverflow.com/questions/74113/access-the-camera-with-iphone-sdk
How can I get a precise time, for example in milliseconds in Objective-C? http://stackoverflow.com/questions/889380/how-can-i-get-a-precise-time-for-example-in-milliseconds-in-objective-c
How do I record audio on iPhone with AVAudioRecorder? http://stackoverflow.com/questions/1010343/how-do-i-record-audio-on-iphone-with-avaudiorecorder like the example SpeakHere shows. There are not any examples of how to best do this in the iPhone Dev Center and only reference to the classes. I am a newbie at iPhone development so I am looking for a simple sample to get me started. Thanks in advance...
UIScrollView horizontal paging like Mobile Safari tabs http://stackoverflow.com/questions/1220354/uiscrollview-horizontal-paging-like-mobile-safari-tabs ClipView 's clipsToBounds is set to YES if its width is less than that of its parent view. Also the ClipView needs a reference to the UIScrollView . The final step is to override UIView hitTest withEvent inside the ClipView . UIView hitTest CGPoint..
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone whereas as I understand it the method provided by previous posts and at the bottom of this post provides a read only reference to data . Method 1 Writable Pixel Information I defined constants #define RGBA 4 #define RGBA_8_BIT 8 In my UIImage subclass..
iPhone ivar naming convention [duplicate] http://stackoverflow.com/questions/2114587/iphone-ivar-naming-convention How does an underscore in front of a variable in a cocoa objective c class work I've noticed that in a lot of the reference materials out there I see that a lot of the time variables are named _variable in the .h file then are @synthesize'd in..
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 to run with ie 3.0. You set your Base SDK to the latest version that you are compiling with ie 5.0. This way you can reference the newer definitions and symbols in your code. This article SDK and Deployment Targets discusses Deployment vs Base SDK..
EXC_BAD_ACCESS signal received http://stackoverflow.com/questions/327082/exc-bad-access-signal-received from just about anything else including factory methods e.g. NSString stringWithFormat then you'll have an autorelease reference which means it could be released at some time in the future by other code so it is vital that if you need to keep it around..
What's the best way to communicate between view controllers? http://stackoverflow.com/questions/569940/whats-the-best-way-to-communicate-between-view-controllers toss all your methods that will be used for communicating between the viewcontroller into your app delegate and reference the viewcontroller instances in the app delegate methods. Fair 'nuff. A bit further on we get this slide telling us what.. what am I to do Ok that's the set up gang. I know I can easily do my communication methods in the app delegate by reference's the multiple viewcontroller instances in my appdelegate but I want to do this sort of thing the right way. Please help.. pattern. In a nutshell this means that your controller shouldn't look up the objects it needs to do its job e.g. reference a global variable . Instead you should always inject those dependencies into the controller i.e. pass in the objects it..
How do I create delegates in Objective-C? http://stackoverflow.com/questions/626898/how-do-i-create-delegates-in-objective-c declared weak in ARC or assign pre ARC to avoid retain loops since the delegate of an object often holds a strong reference to that object. For example a view controller is often the delegate of a view it contains. To define your own delegates..
Understanding reference counting with Cocoa and Objective-C http://stackoverflow.com/questions/6578/understanding-reference-counting-with-cocoa-and-objective-c reference counting with Cocoa and Objective C I'm just beginning to have a look at Objective C and Cocoa with a view to playing with.. with a view to playing with the iPhone SDK. I'm reasonably comfortable with C's malloc and free concept but Cocoa's references counting scheme has me rather confused. I'm told it's very elegant once you understand it but I'm just not over the hump.. a special case once you understand the basic concepts. In Cocoa each object keeps track of how many times it is being referenced specifically the NSObject base class implements this . By calling retain on an object you are telling it that you want..
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 need to make any assumptions about anything. I checked this a year a so ago by looking at the source but don't have a reference right now. Suppression In trying to think of a situation where suppression of this warning would be necessary and good code..
Difference between objectForKey and valueForKey? http://stackoverflow.com/questions/1062183/difference-between-objectforkey-and-valueforkey
http://stackoverflow.com/questions/12539697/iphone-5-css-media-query
iphone Core Data Unresolved error while saving http://stackoverflow.com/questions/1283960/iphone-core-data-unresolved-error-while-saving old model implementation. Edit I almost forgot here's all the error codes that Core Data spits out Core Data Constants Reference I had trouble with this before and I realised I unchecked the correct optional box. Such trouble finding out the problem...
How to get the RGB values for a pixel on an image on the iphone http://stackoverflow.com/questions/144250/how-to-get-the-rgb-values-for-a-pixel-on-an-image-on-the-iphone byte green byte blue RGBPixel Step 3. I subclassed UIImageView and declared with corresponding synthesized properties Reference to Quartz CGImage for receiver self CFDataRef bitmapData Buffer holding raw pixel data copied from Quartz CGImage held in..
Video file formats supported in iPhone http://stackoverflow.com/questions/1535836/video-file-formats-supported-in-iphone
Get the password from the webservices url and access through that password http://stackoverflow.com/questions/15377212/get-the-password-from-the-webservices-url-and-access-through-that-password 5. To receive the data from the HTTP request you can use the delegate methods provided by the URLConnection Class Reference. Delegate methods are as below. void connection NSURLConnection connection didReceiveData NSData data Above method is used..
Xcode 5 without Storyboard and ARC http://stackoverflow.com/questions/17234172/xcode-5-without-storyboard-and-arc nav self.window makeKeyAndVisible return YES STEPS FOR REMOVE ARC 1 In build setting set Automatic Reference Counting to NO . END If you have Already Created Application with storyboard and ARC then STEPS FOR REMOVE..
How do I change the Navigation Bar color in iOS 7? http://stackoverflow.com/questions/18929864/how-do-i-change-the-navigation-bar-color-in-ios-7 for bars has changed in iOS 7.0. It no longer affects the bar's background. From the documentation barTintColor Class Reference The tint color to apply to the navigation bar background. @property nonatomic retain UIColor barTintColor Discussion This..
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 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..
iPhone : can we open pdf file using UIWebView? http://stackoverflow.com/questions/2832245/iphone-can-we-open-pdf-file-using-uiwebview 10 10 200 200 NSURL targetURL NSURL URLWithString @ http developer.apple.com iphone library documentation UIKit Reference UIWebView_Class UIWebView_Class.pdf NSURLRequest request NSURLRequest requestWithURL targetURL webView loadRequest request..
API to determine whether running on iPhone or iPad http://stackoverflow.com/questions/2884391/api-to-determine-whether-running-on-iphone-or-ipad
UILongPressGestureRecognizer gets called twice when pressing down http://stackoverflow.com/questions/3319591/uilongpressgesturerecognizer-gets-called-twice-when-pressing-down accordingly. i.e. you can through away all events after the start or only look at movement as you need. From the Class Reference Long press gestures are continuous. The gesture begins UIGestureRecognizerStateBegan when the number of allowable fingers..
iPhone Development - Setting UIWebView font http://stackoverflow.com/questions/449773/iphone-development-setting-uiwebview-font the font please let me know other alternatives to UIWebView. Thanks iphone uiwebview share improve this question Reference a css style sheet in your HTML document or put the style information into the top of the HTML document itself share improve..
iOS 5 Best Practice (Release/retain?) http://stackoverflow.com/questions/6308425/ios-5-best-practice-release-retain automatic ref counting share improve this question It's up to you. You can write apps using ARC Automatic Reference Counting and Xcode will write glue code to allow your ARC enabled apps to run on iOS 4 no modifications required. However..
How can I locally detect iPhone clock advancement by a user between app runs? http://stackoverflow.com/questions/7122216/how-can-i-locally-detect-iphone-clock-advancement-by-a-user-between-app-runs changed mid way CACurrentMediaTime uses mach_absolute_time http developer.apple.com library mac #documentation Cocoa Reference CoreAnimation_functions Reference reference.html Here you have an example on how to use CACurrentMediaTime http www.informit.com.. uses mach_absolute_time http developer.apple.com library mac #documentation Cocoa Reference CoreAnimation_functions Reference reference.html Here you have an example on how to use CACurrentMediaTime http www.informit.com blogs blog.aspx b 02b4e309..
Access the camera with iPhone SDK http://stackoverflow.com/questions/74113/access-the-camera-with-iphone-sdk and UIImagePickerControllerEditedImage respectively. see http developer.apple.com iphone library documentation UIKit Reference UIImagePickerControllerDelegate_Protocol UIImagePickerControllerDelegate UIImagePickerControllerDelegate.html for more details..
How can I get a precise time, for example in milliseconds in Objective-C? http://stackoverflow.com/questions/889380/how-can-i-get-a-precise-time-for-example-in-milliseconds-in-objective-c
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