过程既触摸事件和手势识别

Question

我用UISwipeGestureRecognizer和我重写

-(void)touchesBegan...,-(void)touchesEnded...,-(void)touchesMoved... methods. 

看来的touchesBegan和touchesMoved保持跟踪直到触摸滑动手势识别，touchesEnded不叫（同touchesCancelled）。但我需要滑动手势识别器和touchesEnded来完成这项工作，我该怎么做？

Answer 1

首先，将滑动手势识别器从库中拖放到视图中。

你检查过在查看取消的项目。

写代码来响应滑动手势。

- (IBAction)swipe:(id)sender { 
    v.backgroundColor = [UIColor blueColor]; 
} 

然后，写入触摸委托方法。

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    UITouch* touch = [touches anyObject];  
    CGPoint pt = [touch locationInView:self]; 
    layer.frame = CGRectMake(pt.x, pt.y, 100, 100); 
} 

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    UITouch* touch = [touches anyObject];  
    CGPoint pt = [touch locationInView:self]; 
    layer.frame = CGRectMake(pt.x, pt.y, 100, 100); 
} 

- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    layer.frame = CGRectMake(0, 0, 100, 100); 
} 

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event 
{ 
    self.backgroundColor = [UIColor redColor]; 
} 

现在你可以将图像不取消，你可以滑动屏幕来设置颜色为蓝色（滑动手势识别成功）。你可以。而且，当触摸结束时，窗口颜色变为红色。

您可以下载这个示例项目，只是运行它：

https://github.com/weed/p120812_TouchAndGesture