iphone - 如何检测图像是否被触摸

Question

在 Xcode 中如何检测图像是否被触摸？我看过 Apple 文档，它真的很困惑......我看到了:

if (CGRectContainsPoint([imageView frame], location))

但我的图像仍然不会移动。我尝试使用 touchesBegan + touchesMoved，并将图像的 userInteractionIsEnabled 设置为 YES，但它仍然检测不到它:(

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编辑:非常感谢大家的宝贵建议!最后，我真的很想让它尽可能简单，而且我知道我的代码应该可以工作，所以我一直在摆弄它，睡了一觉后，我意识到这是一个相当简单的解决方案:

在我的 touchesMoved 中:

    UITouch *touch = [[event allTouches] anyObject];
    CGPoint location = [touch locationInView:touch.view];

    CGRect shapeRect = [imageView frame];
    CGRect dropSquareRect = [dropSquare frame];

    CGPoint touchLocation = CGPointMake(location.x, location.y);

    if (CGRectContainsPoint(shapeRect, touchLocation))
    {
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:.3];
        [imageView setCenter:touchLocation];
        [UIView commitAnimations];
    }

    if (CGRectIntersectsRect(shapeRect, dropSquareRect))
    {
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:.3];
        [UIView setAnimationCurve:UIViewAnimationCurveEaseOut];
        self.imageView.alpha = 0;
        self.imageView.center = CGPointMake(dropSquare.center.x, dropSquare.center.y);
        self.imageView.transform = CGAffineTransformMakeScale(0.8, 0.8);
        [UIView commitAnimations];

Answer 1

您可以考虑使用 UITapGestureRecognizer 和 UIImageView 来检测触摸。

并且不要忘记将 userInteractionIsEnabled 设置为 YES。

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self              action:@selector(imageTapped:)];
myImageView.userInteractionIsEnabled = YES;
[myImageView addGestureRecognizer:tap];
[tap release];

实现 imageTapped: 方法。

- (void )imageTapped:(UITapGestureRecognizer *) gestureRecognizer 
   {

   }