鼠标移动UIview 位置随着鼠标改变

@interface TestView : UIView
@property(nonatomic,assign)CGPoint point;
@end




@interface TestView(){

    //开始触摸这个点
    CGPoint _startPoint;
    

}

@end





//当你开始触摸的时候,到这看看.
//一次出没时间发生时,该方法只执行一次.
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{

    //取出手指触碰屏幕的坐标
    _startPoint =[[touches anyObject]locationInView:self];
   
    
    NSLog(@"我要开始摸了.");
    self.backgroundColor=[UIColor blueColor];

}
//一次触摸事件尚未结束,会一直调用该方法
//没摸完,就一直摸.
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{

    NSLog(@"触摸ing");
    self.backgroundColor=[UIColor colorWithRed:arc4random()%256/255.0 green:arc4random()%256/255.0 blue:arc4random()%256/255.0 alpha:1];
    
    
    //取移动中的点
 
    CGPoint nowPoint=[[touches anyObject]locationInView:self];
    
    CGFloat x=nowPoint.x-_startPoint.x;
    CGFloat y=nowPoint.y - _startPoint.y;
    CGPoint centerPoint =CGPointMake(self.center.x+x,self.center.y+y );
    self.center =centerPoint;
}


//一次触摸事件结束,执行该方法
//摸完了
-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{

    NSLog(@"结束了");

}


//触摸事件被别的事件打算
//有人打扰
-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{


}

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