UIGestureRecognizer:
1.locationinView 获取手势在某个视图里面的坐标位置
2.delegate监听手势的行为
3.state状态
开始：UIGestureRecognizerStateBegan 手势达到要求
识别：UIGestureRecognizerStateRecognized 手势识别的最后一刻
改变：UIGestureRecognizerStateChanged 手势过程当中
结束：UIGestureRecognizerStateEnded 手势结束
取消：UIGestureRecognizerStateCancelled
失败：UIGestureRecognizerStateFailed
1.单击
UITapGestureRecognizer *singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleSingleFingerEvent:)];
singleFingerOne.numberOfTouchesRequired = 1; 手指数
singleFingerOne.numberOfTapsRequired = 1; tap次数
2.长按
UILongPressGestureRecognizer *longpressGesutre=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(handleLongpressGesture:)];
longpressGesutre.minimumPressDuration=1; 最少长按时间
longpressGesutre.allowableMovement=15; 最大15像素的运动是手势识别所允许的
3.滑动
UISwipeGestureRecognizer *swipeGesture=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeGesture:)];
swipeGesture.direction=UISwipeGestureRecognizerDirectionLeft; 不设置是右 多个方向用|或
4.捏
UIPinchGestureRecognizer *pinchGesture=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(PinchGesture:)];
-(void) pinchGesture:(id)sender{
UIPinchGestureRecognizer *gesture = sender; //手势改变时
if (gesture.state == UIGestureRecognizerStateChanged){ //捏合手势中scale属性记录的缩放比例
_imageView.transform = CGAffineTransformScale(_imageView.transform，gesture.scale, gesture.scale);
} //结束后恢复
if(gesture.state==UIGestureRecognizerStateEnded){ [UIView animateWithDuration:0.5 animations:^{
_imageView.transform = CGAffineTransformIdentity;//取消一切形变
}];
}
}-(void)rotationGesture:(id)sender{
UIRotateGestureRecognizer *gesture = sender;
if (gesture.state==UIGestureRecognizerStateChanged){
_imageView.transform=CGAffineTransform=Rotation(_imageView.transform,gesture.rotation);
}
if(gesture.state==UIGestureRecognizerStateEnded){
[UIView animateWithDuration:1 animations:^{
_imageView.transform=CGAffineTransformIdentity;//取消形变
}];
}
}
6.多手势
ios开发中，默认是在同一时间只能有一个手势被执行，要实现多个手势同时进行，须实现UIGestureRecognizerDelegate，并重写函数
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{
return YES；
}