UITapGestureRecognizer //点击手势
UILongPressGestureRecognizer // 长按手势
UISwipeGestureRecognizer // 轻扫手势
UIRotationGestureRecognizer // 旋转手势
UIPinchGestureRecognizer //捏合手势
UIPanGestureRecognizer //拖拽手势
- UIGestureRecognizerDelegate
// 是否允许开始触发手势
- (BOOL)gestureRecognizerShouldBegin:(UIGestureRecognizer *)gestureRecognizer
{
return NO;
}
// 是否允许同时支持多个手势，默认是不支持多个手势
// 返回yes表示支持多个手势
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer
{
return YES;
}
// 是否允许接收手指的触摸点
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
// 获取当前的触摸点
CGPoint curP = [touch locationInView:self.imageView];
//下面表示当触摸点在self.imageView 在中心点左面点击不触发事件，在右面则触发点击事件
if (curP.x < self.imageView.bounds.size.width * 0.5) {
return NO;
}else{
return YES;
}
}
// 创建点按手势
- (void)setUpTap
{
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap:)];
tap.delegate = self;
//连续点击两次
tap.numberOfTapsRequired = 2;
//需要两跟手指一起敲击
tap.numberOfTouchesRequired =2;
[_imageView addGestureRecognizer:tap];
}
- (void)tap:(UITapGestureRecognizer *)tap
{
NSLog(@"%s",__func__);
}
//创建长按手势
- (void)setUpLongPress
{
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress:)];
[self.imageView addGestureRecognizer:longPress];
}
- (void)longPress:(UILongPressGestureRecognizer *)longPress
{
// 默认会触发两次，所以需要加上状态去限制
if (longPress.state == UIGestureRecognizerStateBegan) {
NSLog(@"%s",__func__);
}
}
//创建轻扫手势
- (void)setUpSwipe
{
// 默认轻扫的方向是往右
UISwipeGestureRecognizer *swipe = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe)];
//设置轻扫手势的方向
swipe.direction = UISwipeGestureRecognizerDirectionUp;
[self.imageView addGestureRecognizer:swipe];
// 如果以后想要一个控件支持多个方向的轻扫，必须创建多个轻扫手势，一个轻扫手势只支持一个方向
// 默认轻扫的方向是往右
UISwipeGestureRecognizer *swipeDown = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipe)];
swipeDown.direction = UISwipeGestureRecognizerDirectionDown;
[self.imageView addGestureRecognizer:swipeDown];
}
- (void)swipe
{
NSLog(@"%s",__func__);
}
//创建旋转手势
- (void)setUpRotation
{
UIRotationGestureRecognizer *rotation = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotation:)];
rotation.delegate = self;
[self.imageView addGestureRecognizer:rotation];
}
// 默认传递的旋转的角度都是相对于最开始的位置
- (void)rotation:(UIRotationGestureRecognizer *)rotation
{
self.imageView.transform = CGAffineTransformRotate(self.imageView.transform, rotation.rotation);
// 可以不加下面这句复位的代码试一下效果
// 复位
rotation.rotation = 0;
// 获取手势旋转的角度
NSLog(@"%f",rotation.rotation);
}
//创建捏合手势
- (void)setUpPinch
{
UIPinchGestureRecognizer *pinch = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinch:)];
pinch.delegate = self;
[self.imageView addGestureRecognizer:pinch];
}
//默认传递的的缩放比例都是相对于最开始的大小
- (void)pinch:(UIPinchGestureRecognizer *)pinch
{
self.imageView.transform = CGAffineTransformScale(self.imageView.transform, pinch.scale, pinch.scale);
// 复位
pinch.scale = 1;
}
//创建拖拽手势
- (void)setUpPan
{
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(pan:)];
[self.imageView addGestureRecognizer:pan];
}
//一样是默认是相对于最初位置
- (void)pan:(UIPanGestureRecognizer *)pan
{
// 获取手势的触摸点
// CGPoint curP = [pan locationInView:self.imageView];
// 移动视图
// 获取手势的移动，也是相对于最开始的位置
CGPoint transP = [pan translationInView:self.imageView];
self.imageView.transform = CGAffineTransformTranslate(self.imageView.transform, transP.x, transP.y);
// 复位
[pan setTranslation:CGPointZero inView:self.imageView];
// NSLog(@"%@",NSStringFromCGPoint(curP));
}
