iphone - 如何获取 UIView 中手指点击的坐标？

Question

如何获取 UIView 中手指点击的坐标？ (我不想使用一大堆按钮)

谢谢

Answer 1

有两种方法可以实现此目的。如果您已经拥有正在使用的 UIView 子类，则只需重写该子类上的 -touchesEnded:withEvent: 方法，如下所示:

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *aTouch = [touches anyObject];
    CGPoint point = [aTouch locationInView:self];
    // point.x and point.y have the coordinates of the touch
}

如果您还没有子类化 UIView，并且该 View 由 View Controller 或其他任何东西拥有，那么您可以使用 UITapGestureRecognizer，如下所示:

// when the view's initially set up (in viewDidLoad, for example)
UITapGestureRecognizer *rec = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapRecognized:)];
[someView addGestureRecognizer:rec];
[rec release];

// elsewhere
- (void)tapRecognized:(UITapGestureRecognizer *)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateRecognized)
    {
        CGPoint point = [recognizer locationInView:recognizer.view];
        // again, point.x and point.y have the coordinates
    }
}