iOS開發(fā)中手勢識別有六種：
輕擊手勢（TapGestureRecognizer）,
輕掃手勢 （SwipeGestureRecognizer）,
長按手勢（LongPressGestureRecognizer）,
拖動手勢（PanGestureRecognizer）,
捏合手勢（PinchGestureRecognizer）,
旋轉(zhuǎn)手勢（RotationGestureRecognizer）,
1，輕擊手勢（TapGestureRecognizer）
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)];
tapGesture.numberOfTapsRequired = 1; //點(diǎn)擊次數(shù)
tapGesture.numberOfTouchesRequired = 1; //點(diǎn)擊手指數(shù)
[self.view addGestureRecognizer:tapGesture];
//輕擊手勢觸發(fā)方法
-(void)tapGesture:(UITapGestureRecognizer *)sender
{
//your code
}
2，長按手勢（LongPressGestureRecognizer）
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)];
//設(shè)置長按時間
longPressGesture.minimumPressDuration = 0.5;
[self.view addGestureRecognizer:longPressGesture];
//長按手勢觸發(fā)方法
-(void)longPressGesture:(id)sender
{
UILongPressGestureRecognizer *longPress = sender;
if (longPress.state == UIGestureRecognizerStateBegan)
{
//your code
}
}
說明：長按手勢的常用狀態(tài)如下
開始：UIGestureRecognizerStateBegan
改變：UIGestureRecognizerStateChanged
結(jié)束：UIGestureRecognizerStateEnded
取消：UIGestureRecognizerStateCancelled
失敗：UIGestureRecognizerStateFailed
3，輕掃手勢（SwipeGestureRecognizer）
UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
//設(shè)置輕掃的方向
swipeGesture.direction = UISwipeGestureRecognizerDirectionRight; //向右
[self.view addGestureRecognizer:swipeGesture];
UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)];
//設(shè)置輕掃的方向
swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft; //向左
[self.view addGestureRecognizer:swipeGestureLeft];
//輕掃手勢觸發(fā)方法
-(void)swipeGesture:(id)sender
{
UISwipeGestureRecognizer *swipe = sender;
if (swipe.direction == UISwipeGestureRecognizerDirectionLeft)
{
//向左輕掃
}
if (swipe.direction == UISwipeGestureRecognizerDirectionRight)
{
//向右輕掃
}
}
4，捏合手勢（PinchGestureRecognizer）
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)];
[self.view addGestureRecognizer:pinchGesture];
////捏合手勢觸發(fā)方法
-(void) pinchGesture:(id)sender
{
UIPinchGestureRecognizer *gesture = sender;
//手勢改變時
if (gesture.state == UIGestureRecognizerStateChanged)
{
//捏合手勢中scale屬性記錄的縮放比例
_imageView.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale);
}
//結(jié)束后恢復(fù)
if(gesture.state==UIGestureRecognizerStateEnded)
{
[UIView animateWithDuration:0.5 animations:^{
_imageView.transform = CGAffineTransformIdentity;//取消一切形變
}];
}
}
5，拖動手勢（PanGestureRecognizer）
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)];
[self.view addGestureRecognizer:panGesture];
//拖動手勢觸發(fā)方法
-(void) panGesture:(id)sender
{
UIPanGestureRecognizer *panGesture = sender;
CGPoint movePoint = [panGesture translationInView:self.view];
//your code
}
6，旋轉(zhuǎn)手勢（RotationGestureRecognizer）
UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)];
[self.view addGestureRecognizer:rotationGesture];
//旋轉(zhuǎn)手勢觸發(fā)方法
-(void)rotationGesture:(id)sender
{
UIRotationGestureRecognizer *gesture = sender;
if (gesture.state==UIGestureRecognizerStateChanged)
{
_imageView.transform=CGAffineTransformMakeRotation(gesture.rotation);
}
if(gesture.state==UIGestureRecognizerStateEnded)
{
[UIView animateWithDuration:1 animations:^{
_imageView.transform=CGAffineTransformIdentity;//取消形變
}];
}
}
