IOS

In IOS, if you want to enable a subthread in the main thread, you can use either of the following methods: [Cpp][NSThread detachNewThreadSelector: @ selector (myThreadMainMethod :) toTarget: self withObject: nil];This method was provided earlier in

If you want to limit the maximum number of words when entering something, use the following method: -(BOOL) textField :( UITextField *) textField shouldChangeCharactersInRange :( nsange) range replacementString :( NSString *) string { If ([string

From today on, I will release notes during my IOS learning period to help beginners learn how to develop IOS programming faster, you can also have your own reading notes later. Some places may not be detailed, but as long as you follow the learning

Using Complex touch and gesture Apple's Class with various gesture identifiers, the following uses several gesture identifiers for implementation: Click, sweep, hide, and rotate (shaking is not involved for the moment ). Each gesture has a pop-up

Before ipone 4S, we didn't seem to think too much about screen compatibility, because iphone smart helped us solve it, for example, iphone 3g iphone 3gs for 320*480 iphone 4 iphone 4S for 640*960 we often provide a xx@2x.png if it's a Retina screen,

A recent iOS project has come to an end, using Git for source code management. Gitstats is used for statistics. Statistical result 1. overview Age 105 days, 45 active days (42.86%) Total Files 400 Total Lines of Code 17100 (42058 added, 24958

The solution for opening other connected applications in the SDK has never been allowed to open another application in the program during iOS development. Later, some scholars used class-dump to find such a function in private APIs. That is, use

The Cocoa Touch framework uses a large number of delegation. According to Apple's documents, delegate is a form of delegation mode adopted by the Cocoa Touch framework. The instance code download portal understands the delegate. The required

In iOS development, Singleton is one of the most useful design patterns. It is the most useful way to share data between codes without passing parameters manually. For more information about Singleton and other design patterns, see this book: "Cocoa

[Cpp]? UIImage * im = [UIImage imageWithContentsOfFile: path]; // obtain the image through pathNSData * data = UIImagePNGRepresentation (im); // obtain image data/*There are two methods for obtaining images in ios: UIImageJPEGRepresentation and

-(Void) viewDidLoad{[Super viewDidLoad]; [[Nsicationcenter center defacenter center] addObserver: self selector: @ selector (keyboardWillShow :) name: UIKeyboardWillShowNotification object: nil];} -(Void) didReceiveMemoryWarning{[Super

After the Bonjour service on the server is successfully published, the client can use NSNetService to parse the service. After successful resolution, the client can obtain the details of the communication data, such as the IP address and port. First,

1. After creating UITabBarController, set UITabBar to (0 440; 320 40) and output NSLog (@ "% @", [self. view subviews]);Generally, results like this are returned (" ","")2. in this case, you will find that the frame of the UITransitionView is (0 0; 3

CGFloat: indicates a floating point. CGPoint: indicates a vertex. CGsize: indicates a rectangle with only the height and width. CGRect: indicates the position of a rectangle with the origin. CGRectZero: This constant is used when the height is zero,

Each group in a group table is a partition. In an index table, each index is a partition. Implement a simple table: First, drag a tableview in the xib File and connect its dataSource and delegate to the File's owner. @ Interface

This mainly focuses on the deep copy of the Collection class, mainly because this problem occurs during work. If you have any questions, please correct them.   First, we need to have the following premise: [Array addObject: obj]; In this way, the

The total App downloads of Apple App Store have just exceeded 25 billion recently and continue to rise. There is no doubt that iOS development has always been a hot topic, an industry that has made hundreds of millions of dollars. A successful

For iphone developers, memory management is an extremely important skill. Even if the program functions more powerful and the design is more beautiful, if the memory is not well controlled, it will not escape the inexplicable exit of the program,

1 PrefaceConcurrency is everywhere in programming. How to better utilize concurrency in IOS development has become a key issue. Today we will briefly introduce concurrency. 2 Text Concurrent Execution occurs when two or more tasks are executed

1 PrefaceUse UIPanGestureRecognizer to drag and drop layers. 2. code exampleZYViewController. m   [Plain]@ Synthesize helloWorldLabel;@ Synthesize panGestureRecognizer; -(Void) viewDidLoad{[Super viewDidLoad];Self. view. backgroundColor = [UIColor