IOS中的手势详解(烟台杰瑞教育IOS培训部原创)

IOS中的手势详解

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！ ");

}

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！ ");

}

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

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];

}

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;

}

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;

}