你的位置:首页 > 操作系统

[操作系统]IOS中的手势详解


1、点击

  UITapGestureRecognizer *tap=[[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(click)];    //设置当前需要点击的次数  [tap setNumberOfTapsRequired:1];  //设置当前需要触发事件的手指数量[tap setNumberOfTouchesRequired:2];//设置当前代理tap.delegate=self;[_view addGestureRecognizer:tap];//触发方法- (void) click{  NSLog(@"当前视图被点击了! ");}

2、长按

UILongPressGestureRecognizer * longPress=[[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPress)];//设置当前长按最小的时长longPress.minimumPressDuration=2;//设置允许的移动范围 [longPress setAllowableMovement:2];[_view addGestureRecognizer:longPress];//触发方法- (void) longPress{  NSLog(@"长按事件触发! ");}

3、轻扫

UISwipeGestureRecognizer * swip=[[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipMethod)];  //往左边方向 swip.direction=UISwipeGestureRecognizerDirectionLeft ;  //往右边方向 swip.direction=UISwipeGestureRecognizerDirectionRight ;  //往上面方向  swip.direction=UISwipeGestureRecognizerDirectionUp ;  //往下面方向  swip.direction=UISwipeGestureRecognizerDirectionDown ;  [_view addGestureRecognizer:swip];    //触发方法  - (void) swipMethod{    NSLog(@"轻扫事件触发! ");}

  如果涉及到2个以上方向的手势最好添加多个UISwipeGestureRecognizer 对象并设置不同的方向,不要通过下面方式用符号|来连接:

swip.direction=UISwipeGestureRecognizerDirectionLeft | UISwipeGestureRecognizerDirectionRight 

4、拖动

 

  第一步:添加视图

_view=[[UIView alloc] initWithFrame:CGRectMake(50, 250, 300, 200)];[_view setBackgroundColor:[UIColor redColor]];[self.view addSubview:_view];

  第二步:添加手势

UIPanGestureRecognizer *pan=[[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(paned:)];[_view addGestureRecognizer:pan];

  第三步:实现方法

- (void) paned:(UIPanGestureRecognizer *) pan{    //获取移动的大小  CGPoint point= [pan translationInView:pan.view];  //更改视图的中心点坐标  CGPoint points=_view.center;  points.x+=point.x;  points.y+=point.y;  _view.center=points;  //每次都清空一下消除坐标叠加  [pan setTranslation:CGPointZero inView:pan.view];}

5、旋转

 

  第一步:添加视图

_view=[[UIView alloc] initWithFrame:CGRectMake(50, 250, 300, 200)];[_view setBackgroundColor:[UIColor redColor]];[self.view addSubview:_view];

  第二步:添加手势

UIRotationGestureRecognizer * roate=[[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotate:)];  [_view addGestureRecognizer:roate];roate.delegate=self;

  第三步:实现方法

- (void) rotate:(UIRotationGestureRecognizer *) rote{  //获取当前旋转的度数  CGFloat rotation= rote.rotation;  //通过仿射变换实现旋转 _view.transform=CGAffineTransformRotate(_view.transform, rotation);  //防止旋转叠加需要清零  rote.rotation=0;}

6、捏合

 

  第一步:添加视图

_view=[[UIView alloc] initWithFrame:CGRectMake(50, 250, 300, 200)];[_view setBackgroundColor:[UIColor redColor]];[self.view addSubview:_view];

  第二步:添加手势

UIPinchGestureRecognizer * pich=[[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(piches:)];[_view addGestureRecognizer:pich];pich.delegate=self;

  第三步:实现方法

- (void) piches:(UIPinchGestureRecognizer *) pich{  //获取比例  CGFloat scale=pich.scale;  //通过仿射变换实现缩放  _view.transform=CGAffineTransformScale(_view.transform, scale, scale);  //防止比例叠加需要置为1  pich.scale=1; }

 

【补充】如果需要同时响应多个手势需要重写代理方法

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{  return YES;}