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为UIView添加上下左右滑动操作

方法一: 
在viewDidLoad时为UIView添加操作 
  1. UISwipeGestureRecognizer *recognizer;  
  2. recognizer [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];  
  3. [recognizer setDirection:(UISwipeGestureRecognizerDirectionRight)];  
  4. [[self view] addGestureRecognizer:recognizer];  
  5. [recognizer release];  
  6.   
  7. recognizer [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];  
  8. [recognizer setDirection:(UISwipeGestureRecognizerDirectionLeft)];  
  9. [[self view] addGestureRecognizer:recognizer];  
  10. [recognizer release];  
  11.   
  12. recognizer [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];  
  13. [recognizer setDirection:(UISwipeGestureRecognizerDirectionUp)];  
  14. [[self view] addGestureRecognizer:recognizer];  
  15. [recognizer release];  
  16.   
  17. recognizer [[UISwipeGestureRecognizer alloc] initWithTarget:self action:@selector(handleSwipeFrom:)];  
  18. [recognizer setDirection:(UISwipeGestureRecognizerDirectionDown)];  
  19. [[self view] addGestureRecognizer:recognizer];  
  20. [recognizer release];  

响应操作绑定的事件 

  1. (void)handleSwipeFrom:(UISwipeGestureRecognizer *)recognizer{  
  2.         //UISwipeGestureRecognizerDirectionLeft   UISwipeGestureRecognizerDirectionRight  UISwipeGestureRecognizerDirectionUp  UISwipeGestureRecognizerDirectionDown  
  3.     if (recognizer.direction==UISwipeGestureRecognizerDirectionLeft  
  4.         NSLog(@"Left");   
  5.      
  6.       
  7.  

方法二: 
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  1. #define HORIZ_SWIPE_DRAG_MIN 12  
  2. #define VERT_SWIPE_DRAG_MAX 4  
  3. CGPoint startTouchPosition;  
  4. NSString *dirString  
  5.   
  6. (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{  
  7.     UITouch *touch touches.anyObject;  
  8.     startTouchPosition [touch locationInView:self.view];  
  9.  
  10.   
  11. (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event      
  12.      
  13.     UITouch *touch touches.anyObject;      
  14.     CGPoint currentTouchPosition [touch locationInView:self.view];  
  15.     if (fabsf(startTouchPosition.x currentTouchPosition.x) >=      
  16.         HORIZ_SWIPE_DRAG_MIN &&      
  17.         fabsf(startTouchPosition.y currentTouchPosition.y) <=      
  18.         VERT_SWIPE_DRAG_MAX)      
  19.          
  20.         // Horizontal Swipe     
  21.         if (startTouchPosition.x currentTouchPosition.x)     
  22.             NSLog(@"from left");     
  23.             dirString @"left" 
  24.             
  25.         else     
  26.             NSLog(@"from right");     
  27.             dirString @"right";}  
  28.              
  29.    else if (fabsf(startTouchPosition.y currentTouchPosition.y) >=      
  30.              HORIZ_SWIPE_DRAG_MIN &&      
  31.              fabsf(startTouchPosition.x currentTouchPosition.x) <=      
  32.              VERT_SWIPE_DRAG_MAX)     
  33.          
  34.         // Vertical Swipe     
  35.         if (startTouchPosition.y currentTouchPosition.y)     
  36.             NSLog(@"from bottom");  
  37.             dirString @"bottom";}  
  38.         else     
  39.             NSLog(@"from top");  
  40.             dirString @"top";}  
  41.     else      
  42.         
  43.         //dirString @"";  
  44.         
  45.   
  46.   
  47. (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{  
  48.     if (dirString == @"right" 
  49.         NSLog(@"event right");  
  50.     }else if (dirString == @"left" 
  51.         NSLog(@"event left");  
  52.      
  53.  
posted @ 2012-11-30 14:43  hopeanCom  阅读(622)  评论(0编辑  收藏  举报