IOS中的手势详解

jopen 10年前

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

 IOS中的手势详解

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

 IOS中的手势详解

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

 IOS中的手势详解

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;  }