实现 摇一摇 功能 Shark

1。 在App's Delegate中设定applicationSupportsShakeToEdit属性：

- (BOOL)application:(UIApplication*)application didFinishLaunchingWithOptions:(NSDictionary*)launchOptions

{

    

    application.applicationSupportsShakeToEdit= YES; //在ios6.0后，这里其实都可以不写了

    

    self.window= [[UIWindowalloc] initWithFrame:[[UIScreenmainScreen] bounds]];

    // Override point for customization after application launch.

    self.viewController= [[ViewControlleralloc] initWithNibName:@"ViewController"bundle:nil];

    self.window.rootViewController= self.viewController;

    [self.windowmakeKeyAndVisible];

    returnYES;

}

2。在你的View控制器中添加/重载canBecomeFirstResponder, viewDidAppear:以及viewWillDisappear:

//这里很重要，因为大部分视图 默认 的  canBecomeFirstResponder 是 NO的

-(BOOL)canBecomeFirstResponder {

    return YES;

}

-(void)viewDidAppear:(BOOL)animated {

    [super viewDidAppear:animated];

    [self becomeFirstResponder];

}

-(void)viewWillDisappear:(BOOL)animated {

    [self resignFirstResponder];

    [super viewWillDisappear:animated];

}

3。在你的view控制器中添加motionEnded：

-(void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent*)event

{

    if(motion == UIEventSubtypeMotionShake)

    {

        // your code

    }

}

---------------------------------------------------------------

IOS 3.0 + 开始支持motion事件，检测设备摇动 

 – motionBegan:withEvent:       摇动开始时执行 

 – motionEnded:withEvent:       摇动结束时执行

 – motionCancelled:withEvent:  摇动被取消时执行  

经过试验  

UIViewController

UIWindow

UIView  都可以支持摇一摇

根本是在  motion的一系列回调 以及 canBecomeFirstResponder 等方法 都是 UIResponder 类的特性