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];

[self

becomeFirstResponder];

}

然后去实现那几个方法就可以了

- (void) motionBegan:(UIEventSubtype)motionwithEvent:(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) {

         //somethinghappens

     }

}










iPhone对摇一摇有很好的支持，总体说来就两步：首先在试图控制器中打开接受摇一摇的开关然后在摇一摇触发的制定的方法中实现你要实现的功能就好。代码如下：

[objc]  view plain copy

1. #pragma mark -  
2. #pragma mark yaoyiyao  
3. - (BOOL)canBecomeFirstResponder  
4. {  
5.     return YES;// default is NO  
6. }  
7. - (void)motionBegan:(UIEventSubtype)motion withEvent:(UIEvent *)event  
8. {  
9.     NSLog(@"开始摇动手机");  
10. }  
11. - (void)motionEnded:(UIEventSubtype)motion withEvent:(UIEvent *)event  
12. {  
13.     NSLog(@"stop");  
14.     UIAlertView *yaoyiyao = [[UIAlertView alloc]initWithTitle:@"温馨提示：" message:@"您摇动了手机，想干嘛？" delegate:self cancelButtonTitle:@"CANCEL" otherButtonTitles: nil nil];  
15.     [yaoyiyao show];  
16. }  
17. - (void)motionCancelled:(UIEventSubtype)motion withEvent:(UIEvent *)event  
18. {  
19.     NSLog(@"取消");