IOS

1. Getting the User's Current LocationObtains the current user location.There are three methods to obtain the location: GPS, cell tower triangulation, and Wi-Fi Positioning Service (WPS ). GPS is the most accurate positioning method, but not on the

Find the "application: didfinishlaunchingwitexceptions:" method in appdelegate. m and add the following code: If (! [[NSUserDefaults standardUserDefaults] boolForKey: @ "everLaunched"]) {[[NSUserDefaults standardUserDefaults] setBool: YES forKey: @ "

From. net C # porting to Cocoa Touch Objective C is slow, and about 20 classes in the two-dimensional graphics library have been transplanted. If the amount of work is too large, the system finally decides to give up, here, we will make a summary of

UIKIT_EXTERN NSString * const UITextInputCurrentInputModeDidChangeNotification _ OSX_AVAILABLE_STARTING (_ MAC_NA ,__ IPHONE_4_2 );This notification is available. [[Nsicationcenter center defacenter center] addObserver: self selector: @ selector

Plist files and Property List files are generally xml files used to describe the application software. It mainly includes the following: Whether the keyword type must Abstract The CFBundleDevelopmentRegionStringNo region of the bundle. It usually

Garbage collection is available on the IPhone. Remember to release the dynamically applied memory. In this article, we will summarize the possible memory leakage situations and detection methods. To put it bluntly, there is such a dynamically

[Plain]   -Create UITableView  DataTable = [[UITableView alloc] initWithFrame: CGRectMake (0, 0,320,420)];[DataTable setDelegate: self];[DataTable setDataSource: self];[Self. view addSubview: DataTable];[DataTable release];    2. Description of

[Plain]Static UIImage * shrinkImage (UIImage * original, CGSize size){CGFloat scale = [UIScreen mainScreen]. scale;CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB ();CGContextRef context = CGBitmapContextCreate (NULL, size. width * scale,

Here is an example:Match the Regular Expression of 9-15 strings consisting of letters/numbers:NSString * regex = @ "^ [A-Za-z0-9] {9, 15} $ ";NSPredicate * pred = [NSPredicate predicateWithFormat: @ "self matches % @", regex];BOOL isMatch = [pred

During the development process, it is found that sometimes the last click of UIActionSheet is invalid and it is valid when the upper half of the last item is clicked. This occurs only in certain situations, this scenario is available only when

The following two reference links of the certificate are very good:  Note that the warning notification is actually displayed by yourself. The specific process is as follows: And push messages have their own unique json format, apple's api said very

To save traffic and improve user experience, many applications currently use the local cache mechanism. Among them, Netease news provides the best caching function. My own applications also want to add the local cache function, so I checked the

1. Change addSubview to setRootViewController. [Window addSubview: viewController. view]; modify as follows: If ([[UIDevice currentDevice]. systemVersion floatValue] {// Warning: addSubView doesn' t work on iOS6[Window addSubview: viewController.

[Cpp]Testers in the company always like to tangle bugs on a number that are not the key points,The most common Screen contains multiple buttons or views that can be clicked. If you click them at the same time, various errors and exceptions may occur,

1. IOS sandbox Mechanism IOS creates a file system structure for each application to store the application files. This area becomes a sandbox, including audio, image, text, and other files. 1. Each application has its own storage space. 2.

Animation effect is one of the important features of the IOS interface. CAAnimation is the abstract parent class of all animation objects. For new users, animation methods (class methods) under UIView are mostly used ). You can use the following

1. Average thread creation Overhead: Memory Stack: Master thread -- 1 M, sub thread -- 512 K Time: Negligible   2. multiple ways to create a thread: www.2cto.com NSThread, POSIX (based on APIs supported by C language), NSObject performSelector   3.

Generally, when customizing a system control, subviews in the control should be traversed. [Html]-(Void) willPresentAlertView :( UIAlertView *) alertView {For (UIView * view in [alertView subviews]){// Determine if it is UILabelIf ([[[view class]

Many applications in the iphone can adapt the orientation of the screen according to the orientation of your mobile phone. Of course, not all applications support this function. Specifically, it depends on whether application developers have

I have previously written a simple IOC container. This AOP function is added to thisWrite Intercept class to inherit InvocationHandlerPublic class Intercept implements InvocationHandler {/*** The object to be processed (that is, the object with the