手势识别器和块 [英] Gesture Recognizers and Blocks

问题描述

我们可以将块与手势识别器一起使用吗?看来并非如此.例如，这不起作用:

Can we use blocks with Gesture Recognizers? It doesn't appear so. For example, this does not work:

UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc] initWithTarget: self
     action:^(id sender) {
     }
];

我是否缺少某些东西，还是UIGestureRecognizer类不支持块?

Am I missing something, or are blocks just not supported by the UIGestureRecognizer class?

推荐答案

但是，这应该:

UITapGestureRecognizer *tapped = [[UITapGestureRecognizer alloc] initWithTarget:[^{
    // do stuff
} copy] action:@selector(invoke)];

但是，由于它是私有方法，因此您不应该这样做.

You shouldn't probably do this, however, since it's a private method.

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