UIGestureRecognizer

有兩種方式 (TBD)

• UIResponder的四種方法，可以讓使用者自行設計手勢
  - (void)touch esBegan:(NSSet *)touches withEvent:(UIEvent *)event
  - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
  - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
  - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
   
• UIGestureRecognizer的方式，不用再自己一個一個去設計/解析，目前有6種
  - UILongPressGestureRecognizer
  - UIPanGestureRecognizer
  - UIPinchGestureRecognizer
  - UIRotationGestureRecognizer
  - UISwipeGestureRecognizer
  - UITapGestureRecognizer
• 第一種方式的用法
  參考 iOS: how do you get the touchesBegan coordinates when a UIButton is triggered? 
  

  UIButton *mouse = [UIButton buttonWithType:UIButtonTypeCustom]; [mouse setFrame:CGRectMake(90.0f, 55.0f, 118.0f, 118.0f)]; [mouse setBackgroundImage:[UIImage imageNamed:@"mouse.png"] forState:UIControlStateNormal]; [mouse setTitle:@"Mouse" forState:UIControlStateNormal]; [mouse.titleLabel setFont:[UIFont fontWithName:@"Arial-BoldMT" size:20]]; [mouse setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; [mouse addTarget: self action: @selector(mouseClick:) forControlEvents: UIControlEventTouchDown]; [parent addSubview:mouse]; [mouse addTarget:self action:@selector(touchesBegan:withEvent:)  forControlEvents: UIControlEventTouchDown]; [mouse addTarget:self action:@selector(touchesMoved:withEvent:) forControlEvents: UIControlEventTouchDragInside]; [mouse addTarget:self action:@selector(touchesEnded:withEvent:)  forControlEvents: UIControlEventTouchUpInside | UIControlEventTouchUpOutside]; -(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {     NSLog(@"touchesBegan");     UITouch *touch = [[event allTouches] anyObject];     CGPoint touchPoint = [touch locationInView:parent];     NSLog(@"Touch x : %f y : %f", touchPoint.x, touchPoint.y); } -(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {     NSLog(@"touchesMoved");     UITouch *touch = [[event allTouches] anyObject];     CGPoint touchPoint = [touch locationInView:parent];     NSLog(@"Touch x : %f y : %f", touchPoint.x, touchPoint.y);     mouse.center = CGPointMake(touchPoint.x,touchPoint.y); } -(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {     NSLog(@"touchesEnded");     UITouch *touch = [[event allTouches] anyObject];     CGPoint touchPoint = [touch locationInView:parent];     NSLog(@"Touch x : %f y : %f", touchPoint.x, touchPoint.y); }

轉至：http://ed32.blogspot.com/2011_07_31_archive.html