iOS开发 ----- UIGestureRecognizer

UIGestureRecognizer

手势识别相关API

在添加手势之前要把该View的用户交互打开,不然时无效的imageView.userInteractionEnabled = YES;

UITapGestureRecognizer 点击手势

//点击手势//发生该手势时调用的方法    UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tapView:)];//点击次数    tap.numberOfTapsRequired = 2;//需要几个手指    tap.numberOfTouchesRequired = 1;//添加手势    [imageView addGestureRecognizer:tap];

UILongPressGestureRecognizer 长按手势

//长按手势//长按的时间    press.minimumPressDuration = 1;//发生长按时调用的方法        UILongPressGestureRecognizer * press = [[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(pressView:)];

UIPanGestureRecognizer 移动手势

//移动手势    UIPanGestureRecognizer * pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pressView:)];

UIPinchGestureRecognizer 缩放手势

//缩放手势    UIPinchGestureRecognizer * pinch = [[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(pinchView:)];//缩放手势调用的方法- (void)pinchView:(UIPinchGestureRecognizer *)pinch{    UIView *view = pinch.view;    view.transform = CGAffineTransformScale(view.transform, pinch.scale, pinch.scale);    //重置缩放系数为1.0    pinch.scale = 1.0;}

UIRotationGestureRecognizer 旋转手势

//旋转手势    UIRotationGestureRecognizer * rotation = [[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationView:)];//发生该手势时调用的方法    - (void)rotationView:(UIRotationGestureRecognizer *)rotation{    UIView * view = rotation.view;    view.transform = CGAffineTransformMakeRotation(rotation.rotation);}