如何在iOS应用中启用多次触摸? [英] How to enable multiple touches in an iOS app?

问题描述

这是代码:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
  if ([touches count] == 1) {
    // code
  } else {
    // code
  }
}

当我使用模拟器中的Option键模拟双击时，代码总是选择我的if语句的第一部分，就像只收到了一次触摸一样.

When I simulate the double tap with the Option key in simulator, the code always chooses the first part of my if statement, as if there were only 1 touch received.

为什么我没有同时收到两个触摸?

Why am I not receiving both touches?

推荐答案

The multipleTouchEnabled property needs to be set to YES before the view can accept multitouch.

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