iOS 摇一摇功能的实现

在 UIResponder中存在这么一套方法

- (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_3_0);

 

- (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_3_0);

- (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event __OSX_AVAILABLE_STARTING(__MAC_NA,__IPHONE_3_0);




这就是执行摇一摇的方法。那么怎么用这些方法呢？

很简单，你只需要让这个Controller本身支持摇动

同时让他成为第一相应者：

- (void)viewDidLoad

{

    [superviewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

    [[UIApplicationsharedApplication] setApplicationSupportsShakeToEdit:YES];

[self

becomeFirstResponder];

}

然后去实现那几个方法就可以了

- (void) motionBegan:(UIEventSubtype)motion withEvent:(UIEvent

*)event

{

    //检测到摇动

}

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

{

    //摇动取消

}

 

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

 

{

    //摇动结束

    if (event.subtype == UIEventSubtypeMotionShake) {

        //something happens

 

    }

}