iOS开发之摇一摇功能的实现

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 anib.

[[UIApplicationsharedApplication]setApplicationSupportsShakeToEdit:YES];

becomeFirstResponder];

*)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) {

//somethinghappens

}

}