Gesture Recognition for iOS development

There are a total of six gesture recognition:

Tap gestures (tapgesturerecognizer),

Swipe gesture (Swipegesturerecognizer),

Long-Press gesture (Longpressgesturerecognizer),

Drag gestures (pangesturerecognizer),

Pinch gesture (pinchgesturerecognizer),

Rotation gesture (rotationgesturerecognizer);

1, tap gesture (Tapgesturerecognizer)

//新建tap手势 UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)]; //设置点击次数和点击手指数 tapGesture.numberOfTapsRequired = 1; // 点击次数 tapGesture.numberOfTouchesRequired = 1; // 点击手指数 [self.view addGestureRecognizer:tapGesture]; // 添加


//轻击手势触发方法 -(void)tapGesture:(id)sender { 　　 //轻击后要做的事情 }

2, long press gesture (Longpressgesturerecognizer)

//添加长摁手势 UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)]; //设置长按时间 longPressGesture.minimumPressDuration = 0.5; //(2秒) [self.view addGestureRecognizer:longPressGesture];

//常摁手势触发方法 -(void)longPressGesture:(id)sender { 　　 UILongPressGestureRecognizer *longPress = sender; 　　 if (longPress.state == UIGestureRecognizerStateBegan) { 　　　　 UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@ "提示" message:@ "长按触发" delegate:nil cancelButtonTitle:@ "取　　　　消" otherButtonTitles: nil]; 　　　　 [alter show]; 　　 } }

Description: The common status of gestures is as follows

• Start: Uigesturerecognizerstatebegan

• Change: uigesturerecognizerstatechanged

• Ends: uigesturerecognizerstateended

• Cancel: uigesturerecognizerstatecancelled

• Failure: uigesturerecognizerstatefailed

3, swipe gesture (Swipegesturerecognizer)

//添加轻扫手势 UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; //设置轻扫的方向 swipeGesture.direction = UISwipeGestureRecognizerDirectionRight; //默认向右 [self.view addGestureRecognizer:swipeGesture]; //添加轻扫手势 UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; //设置轻扫的方向 swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft; //默认向右 [self.view addGestureRecognizer:swipeGestureLeft];

//轻扫手势触发方法 -(void)swipeGesture:(id)sender { 　　UISwipeGestureRecognizer *swipe = sender; 　　 if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) { 　　　　 //向左轻扫做的事情 　　　　 } 　　 if (swipe.direction == UISwipeGestureRecognizerDirectionRight) { 　　　　 //向右轻扫做的事情 　　 } }

4, pinch gesture (pinchgesturerecognizer)

//添加捏合手势 UIPinchGestureRecognizer *pinchGesture = [[UIPinchGestureRecognizer alloc] initWithTarget:self action:@selector(pinchGesture:)]; [self.view addGestureRecognizer:pinchGesture];

////捏合手势触发方法 -(void) pinchGesture:(id)sender { 　　 UIPinchGestureRecognizer *gesture = sender; 　　 //手势改变时 　　 if (gesture.state == UIGestureRecognizerStateChanged) { 　　　　 //捏合手势中scale属性记录的缩放比例 　　　　 _imageView.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale); 　　 } 　　 //结束后恢复 　　 if (gesture.state==UIGestureRecognizerStateEnded) { 　　　　 [UIView animateWithDuration:0.5 animations:^{ 　　　　 _imageView.transform = CGAffineTransformIdentity; //取消一切形变 　　　　 }]; 　　 } }

5, drag gesture (Pangesturerecognizer)

//添加拖动手势 UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)]; [self.view addGestureRecognizer:panGesture];

//拖动手势 -(void) panGesture:(id)sender { 　　 UIPanGestureRecognizer *panGesture = sender; 　　 CGPoint movePoint = [panGesture translationInView:self.view];  　　 //做你想做的事儿 }

6, rotation gesture (Rotationgesturerecognizer)

//添加旋转手势 UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)]; [self.view addGestureRecognizer:rotationGesture];

//旋转手势 -(void)rotationGesture:(id)sender　　{ 　　 UIRotationGestureRecognizer *gesture = sender; 　　 if (gesture.state==UIGestureRecognizerStateChanged) { 　　　　 _imageView.transform=CGAffineTransformMakeRotation(gesture.rotation); 　　 } 　　 if (gesture.state==UIGestureRecognizerStateEnded) { 　　　　 [UIView animateWithDuration:1 animations:^{ 　　　　 _imageView.transform=CGAffineTransformIdentity; //取消形变 　　　　 }]; 　　 } }Common gestures in iOS that can be absorbed by yourself ~

Gesture Recognition for iOS development