UIGestureRecognizer
其他
2018-08-08 21:53:25
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1、tapGesture 点击手势
1.1 tapGesture 的创建
// 实例化点击手势对象
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapClick:)];
// 向 imageView 添加点击手势
[imageView addGestureRecognizer:tapGesture];
1.2 tapGesture 的设置
// 设置点击次数
/*
默认为 1:单击,为 2 时为双击
*/
singleTapGesture.numberOfTapsRequired = 1;
// 设置触摸点数
/*
默认为 1,单个手指触摸
*/
singleTapGesture.numberOfTouchesRequired = 1;
// 单双击共存
/*
设置单击手势与双击手势共存,当没有检测到双击手势或检测双击手势失败时单击手势才有效
*/
[singleTapGesture requireGestureRecognizerToFail:doubleTapGesture];
// 获取点击的视图
/*
剪取点击的视图,附带点击手势一起剪取
*/
UIView *tapView = tapGesture.view;
// 获取点击的图片
/*
复制点击的图片,附带点击手势一起复制
*/
UIImage *tapImage = ((UIImageView *)tapGesture.view).image;
1.3 自定义触摸响应事件处理
- (void)tapClick:(UITapGestureRecognizer *)tapGesture {
}
2、longPressGesture 长按手势
2.1 longPressGesture 的创建
// 实例化长按手势对象
UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressClick:)];
// 向 imageView 添加长按手势
[imageView addGestureRecognizer:longPressGesture];
2.2 longPressGesture 的设置
// 获取手势状态
UIGestureRecognizerState state = longPressGesture.state;
// 长按手势开始
if (longPressGesture.state == UIGestureRecognizerStateBegan) {
}
// 长按手势触发结束
if (longPressGesture.state == UIGestureRecognizerStateEnded) {
}
2.3 自定义触摸响应事件处理
- (void)longPressClick:(UILongPressGestureRecognizer *)longPressGesture {
}
3、rotationGesture 旋转手势
3.1 rotationGesture 的创建
// 实例化旋转手势对象
UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationClick:)];
// 向 imageView 添加旋转手势
[imageView addGestureRecognizer:rotationGesture];
3.2 rotationGesture 的设置
// 获取旋转角度
/*
rotation 获取到的为弧度,1 度 = PI/180 弧度
*/
CGFloat rotation = rotationGesture.rotation * 180 * M_1_PI;
// 图片旋转
/*
lastRotation 为之前的角度
*/
imageView.transform = CGAffineTransformMakeRotation(lastRotation + rotationGesture.rotation);
// 旋转手势触发结束
if (rotationGesture.state == UIGestureRecognizerStateEnded) {
lastRotation += rotationGesture.rotation;
}
3.3 自定义触摸响应事件处理
// 用模拟器时需按住 option 键
- (void)rotationClick:(UIRotationGestureRecognizer *)rotationGesture {
}
4、pinchGesture 捏合手势
4.1 pinchGesture 的创建
// 实例化捏合手势对象
UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchClick:)];
// 向 imageView 添加捏合手势
[imageView addGestureRecognizer:pinchGesture];
4.2 pinchGesture 的设置
// 获取缩放倍数
CGFloat scale = pinchGesture.scale;
// 图片缩放
imageView.transform = CGAffineTransformMakeScale(pinchGesture.scale, pinchGesture.scale);
imageView.bounds = CGRectMake(0, 0, imageView.bounds.size.width * pinchGesture.scale,
imageView.bounds.size.height * pinchGesture.scale);
// 还原缩放倍数
[pinchGesture setScale:1];
4.3 自定义触摸响应事件处理
// 用模拟器时需按住 option 键
- (void)pinchClick:(UIPinchGestureRecognizer *)pinchGesture {
}
5、panGesture 拖动手势
5.1 panGesture 的创建
// 实例化拖拽手势对象
UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panClick:)];
// 向 imageView 添加拖拽手势
[imageView addGestureRecognizer:panGesture];
5.2 panGesture 的设置
// 获取手势位置
CGPoint currentPoint = [panGesture locationInView:self.view];
// 图片移动
imageView.center = currentPoint;
5.3 自定义触摸响应事件处理
- (void)panClick:(UIPanGestureRecognizer *)panGesture {
}
6、swipeGesture 滑动手势
6.1 swipeGesture 的创建
// 实例化滑动手势对象
UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeClick:)];
// 设置滑动方向,默认为 0:向右滑动
swipeGesture.direction = UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight;
// 向 imageView 添加拖拽手势
[imageView addGestureRecognizer:swipeGesture];
6.2 swipeGesture 的设置
// 获取滑动方向
UISwipeGestureRecognizerDirection direction = swipeGesture.direction;
6.3 自定义触摸响应事件处理
- (void)swipeClick:(UISwipeGestureRecognizer *)swipeGesture {
}
转载自www.cnblogs.com/CH520/p/9413507.html