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

 


    }


}