IOS

The basic principle is to describe the layer of the uiview to the graphic context. UiviewCodeAs follows: 1 uiview global photo taking -(Uiimage *) screenimage :( uiview *) view {uiimage * screenimage; uigraphicsbeginimagecontext (view. frame. size)

Application Changes in IOS are mainly concentrated in three aspects: interface, business logic, and data source. The following is a self-developed technical experiment that can be used to handle changes in the business logic. For more information,

After ios6, orientation can be set in the plist file. The setting item is "supported interface orientations ". If you use ios5 or the following versionBy default, the uiviewcontroller class supports portrait only. To support other orientation, You

In iOS, you must pass the user's consent to access the user's location (cllocationmanager). This process is controlled by the system and automatically asks the user at the first request, if you can show users the reason for using coordinates, rather

Uiviewcontroller, as its name implies, should be inMVCPlay the role of the control layer in the design mode, similar to the activity in Android. The view corresponding to uiviewcontroller. You can customize the XIB or dynamically generate the

When you create an object using the new alloc COPY method, the reference count of this object is 1. When you are not using this object, you are responsible for sending a release (or autorelease) message to this object. When you obtain an object

This article records a guy who has been dealing with. NET and SQL since the development of IOS. Because it is in learning, it is inevitable that there will be many omissions. Because the current major project is not iOS development, the update may

To use avaudioplayer, you must first import: avfoundation. Framework Initialization:   _Player = [[AVAudioPlayer alloc] initWithContentsOfURL:[NSURL fileURLWithPath:backgroundMusicPath] error:&error]; Attribute:     1. Volume   Player.

1. Architecture comparison between MAC and IOS Mac: Cocoa, Media, Core Service, and Core OS Ios: Cocoa Touch, Media, Core Service, and Core OS We can see that the changes in Ios and Mac are mainly different from those in Cocoa Touch. Cocoa Touch

1. analogy When you are a beginner in Ios development, you should first understand the environment in which the developed applications are stored. Just like switching to a company as a code farmer, you must first understand the various departments

-(BOOL) application :( UIApplication *) application didfinishlaunchingwitexceptions :( NSDictionary *) launchOptions { // Override point for customization after application launch. RootViewController * rootController = [[RootViewControlleralloc]

First look at two runloop examples, source: http://paste.lisp.org/display/86524 First:   # Include Static void _ Perform (void * info _ unused) { Printf ("hello \ n "); } Static void _ Timer (CFRunLoopTimerRef timer _ unused, void *

People know that the gdb package coming from Cydia is broken since 4.3.But here is a simple way to have a working gdb running on your iOS device: use the one from the Apple SDK! Prerequisites:-A jailbroken iOS> = 4.3 device-OpenSSH shoshould be

Ref: http://bjango.com/articles/pngcompression/ At face value, running your images through a tool like ImageOptim seems like a great idea. it grinds away, shaving kilobytes or bytes off each file, hopefully helping your app download and launch

IOS: http://developer.apple.com/library/ios/#technotes/tn2239/_index.html Mac OS X: http://developer.apple.com/library/ios/#technotes/tn2004/tn2124.html ========================================================== ======================================

Although the ARC mechanism is added to iOS 5.0 and later versions, memory leakage may still exist due to the complicated mutual reference relationship. Therefore, it is important to understand the principles. This article describes how to use

Various NSString initialization and retainCount int main(int argc, const char * argv[]){ @autoreleasepool { NSString *s1 = @"Constant string"; NSLog(@"%lx", [s1 retainCount]); // ffffffffffffffff NSString *s2 =

Because of China's national conditions, when marking and adding Annotation on MapView, there will always be a few hundred meters deviation from the actual GPS coordinates. Similarly, the address is also offset when reverse resolution is performed

UIImage + wiRoundedRectImage. h #import @interface UIImage (wiRoundedRectImage)+ (id)createRoundedRectImage:(UIImage*)image size:(CGSize)size radius:(NSInteger)r;@end   UIImage + wiRoundedRectImage. m #import

First, I would like to add that this series is not a tutorial. In addition to errors, this series will not be written in a simple order. What theme to write depends on your mood. After C # is switched to Objective-c development, the following