iOS開發之手勢識別

標籤：

總共有六種手勢識別：

輕擊手勢（TapGestureRecognizer）,

撥動手勢 （SwipeGestureRecognizer）,

長按手勢（LongPressGestureRecognizer）,

拖動手勢（PanGestureRecognizer）,

捏合手勢（PinchGestureRecognizer）,

旋轉手勢（RotationGestureRecognizer）;

 

 

1，輕擊手勢（TapGestureRecognizer）

 

//建立tap手勢 UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapGesture:)]; //設定點擊次數和點擊手指數 tapGesture.numberOfTapsRequired = 1; // 點擊次數 tapGesture.numberOfTouchesRequired = 1; // 點擊手指數 [self.view addGestureRecognizer:tapGesture]; // 添加


 

//輕擊手勢觸發方法 -(void)tapGesture:(id)sender { 　　 //輕擊後要做的事情 }

 

 

2，長按手勢（LongPressGestureRecognizer）

 

//添加長摁手勢 UILongPressGestureRecognizer *longPressGesture = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longPressGesture:)]; //設定長按時間 longPressGesture.minimumPressDuration = 0.5; //(2秒) [self.view addGestureRecognizer:longPressGesture];

 

//常摁手勢觸發方法 -(void)longPressGesture:(id)sender { 　　 UILongPressGestureRecognizer *longPress = sender; 　　 if (longPress.state == UIGestureRecognizerStateBegan) { 　　　　 UIAlertView *alter = [[UIAlertView alloc] initWithTitle:@ "提示" message:@ "長按觸發" delegate:nil cancelButtonTitle:@ "取　　　　消" otherButtonTitles: nil]; 　　　　 [alter show]; 　　 } }

 

說明：手勢的常用狀態如下

• 開始：UIGestureRecognizerStateBegan

• 改變：UIGestureRecognizerStateChanged

• 結束：UIGestureRecognizerStateEnded

• 取消：UIGestureRecognizerStateCancelled

• 失敗：UIGestureRecognizerStateFailed

 

 

3，撥動手勢（SwipeGestureRecognizer）

 

//添加撥動手勢 UISwipeGestureRecognizer *swipeGesture = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; //設定輕掃的方向 swipeGesture.direction = UISwipeGestureRecognizerDirectionRight; //預設向右 [self.view addGestureRecognizer:swipeGesture];  //添加撥動手勢 UISwipeGestureRecognizer *swipeGestureLeft = [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(swipeGesture:)]; //設定輕掃的方向 swipeGestureLeft.direction = UISwipeGestureRecognizerDirectionLeft; //預設向右 [self.view addGestureRecognizer:swipeGestureLeft];

 

//撥動手勢觸發方法 -(void)swipeGesture:(id)sender { 　　UISwipeGestureRecognizer *swipe = sender; 　　 if (swipe.direction == UISwipeGestureRecognizerDirectionLeft) { 　　　　 //向左輕掃做的事情 　　　　 } 　　 if (swipe.direction == UISwipeGestureRecognizerDirectionRight) { 　　　　 //向右輕掃做的事情 　　 } }

 

 

4，捏合手勢（PinchGestureRecognizer）

 

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

 

////捏合手勢觸發方法 -(void) pinchGesture:(id)sender { 　　 UIPinchGestureRecognizer *gesture = sender;  　　 //手勢改變時 　　 if (gesture.state == UIGestureRecognizerStateChanged) { 　　　　 //捏合手勢中scale屬性記錄的縮放比例 　　　　 _imageView.transform = CGAffineTransformMakeScale(gesture.scale, gesture.scale); 　　 }  　　 //結束後恢複 　　 if (gesture.state==UIGestureRecognizerStateEnded) { 　　　　 [UIView animateWithDuration:0.5 animations:^{ 　　　　 _imageView.transform = CGAffineTransformIdentity; //取消一切形變 　　　　 }]; 　　 } }

 

 

5，拖動手勢（PanGestureRecognizer）

 

//添加拖動手勢 UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGesture:)]; [self.view addGestureRecognizer:panGesture];

 

//拖動手勢 -(void) panGesture:(id)sender { 　　 UIPanGestureRecognizer *panGesture = sender; 　　 CGPoint movePoint = [panGesture translationInView:self.view];  　　 //做你想做的事兒 }

 

 

6，旋轉手勢（RotationGestureRecognizer）

 

//添加旋轉手勢 UIRotationGestureRecognizer *rotationGesture = [[UIRotationGestureRecognizer alloc] initWithTarget:self action:@selector(rotationGesture:)]; [self.view addGestureRecognizer:rotationGesture];

 

//旋轉手勢 -(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; //取消形變 　　　　 }]; 　　 }  }  iOS中常用的手勢，可自行吸收~

iOS開發之手勢識別