iOS如何确定屏幕是否已被点击

Question

我正在使用iOS 5.x SDK，我想确定是否已点击屏幕

现在只需要建立一个NSLog就可以，但我不知道从哪里开始

Answer 1

通常使用gesture recognizers，例如，

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapOnView:)];
[self.view addGestureRecognizer:tap];

然后你有一个方法：

- (void)tapOnView:(UITapGestureRecognizer *)sender
{
    CGPoint location = [sender locationInView:self.view];
    NSLog(@"Tap at %1.0f, %1.0f", location.x, location.y);
}

Answer 2

您可能希望从实施touchesBegan:withEvent:，touchesMoved:withEvent:，touchesEnded:withEvent:，touchesCancelled:withEvent:开始。

您可以在此处详细了解：UIResponder Class Reference