UIGestureRecognizer手勢

weixin_30639719發表於2020-04-05
UI

UIGestureRecognizer:

1.locationinView 獲取手勢在某個檢視裡面的座標位置

2.delegate監聽手勢的行為

3.state狀態

　　開始：UIGestureRecognizerStateBegan  手勢達到要求

　　識別：UIGestureRecognizerStateRecognized  手勢識別的最後一刻

　　改變：UIGestureRecognizerStateChanged  手勢過程當中

　　結束：UIGestureRecognizerStateEnded  手勢結束

　　取消：UIGestureRecognizerStateCancelled

　　失敗：UIGestureRecognizerStateFailed

1.單擊

UITapGestureRecognizer *singleFingerOne = [[UITapGestureRecognizer alloc] initWithTarget:self  action:@selector(handleSingleFingerEvent:)];

singleFingerOne.numberOfTouchesRequired = 1; 手指數

singleFingerOne.numberOfTapsRequired = 1; tap次數

2.長按

UILongPressGestureRecognizer *longpressGesutre=[[UILongPressGestureRecognizer alloc]initWithTarget:self action:@selector(handleLongpressGesture:)];  

longpressGesutre.minimumPressDuration=1;  最少長按時間

longpressGesutre.allowableMovement=15; 最大15畫素的運動是手勢識別所允許的  

3.滑動

UISwipeGestureRecognizer *swipeGesture=[[UISwipeGestureRecognizer alloc]initWithTarget:self action:@selector(handleSwipeGesture:)];  

swipeGesture.direction=UISwipeGestureRecognizerDirectionLeft; 不設定是右  多個方向用|或

4.捏

UIPinchGestureRecognizer *pinchGesture=[[UIPinchGestureRecognizer alloc]initWithTarget:self action:@selector(PinchGesture:)];  

-(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 = CGAffineTransformScale(_imageView.transform，gesture.scale, gesture.scale);
    }    
    //結束後恢復
    if(gesture.state==UIGestureRecognizerStateEnded){
        [UIView animateWithDuration:0.5 animations:^{
            _imageView.transform = CGAffineTransformIdentity;//取消一切形變
        }];
    }
}
5.旋轉
UIRotateGestureRecognizer *rotateGesture=[[UIRotationGestureRecognizer alloc]initWithTarget:self action:@selector(rotationGesture:)]; 
-(void)rotationGesture:(id)sender{    
　　UIRotateGestureRecognizer *gesture = sender;      
　　if (gesture.state==UIGestureRecognizerStateChanged){        
　　　　_imageView.transform=CGAffineTransform=Rotation(_imageView.transform,gesture.rotation);    
　　}       
　　if(gesture.state==UIGestureRecognizerStateEnded){        
　　　　[UIView animateWithDuration:1 animations:^{            
　　　　　　_imageView.transform=CGAffineTransformIdentity;//取消形變   
      }];   
 　 }   
 }

 

6.多手勢

ios開發中，預設是在同一時間只能有一個手勢被執行，要實現多個手勢同時進行，須實現UIGestureRecognizerDelegate，並重寫函式

- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer{

return YES；

}

轉載於:https://www.cnblogs.com/huoran1120/p/5165479.html

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