UIButton UIControlEventTouchUpInside不会触发，但是UIControlEventTouchDown会触发 [英] UIButton UIControlEventTouchUpInside does not fire, but UIControlEventTouchDown does fire

问题描述

我正在实现 UIButton 并且我的 UIControlEventTouchUpInside 事件不会触发，即使 UIControlEventTouchDown 会触发。

I am implementing UIButton and my UIControlEventTouchUpInside event does not fire, even though UIControlEventTouchDown does fire.

UIButton *btnClose = [UIButton buttonWithType:UIButtonTypeCustom];
NSString *filePathImage = @"img.png";
NSString *filePathImageTap = @"img-tap.png";
UIImage *buttonImage = [UIImage imageWithContentsOfFile:filePathImage];
UIImage *buttonImageTap = [UIImage imageWithContentsOfFile:filePathImageTap];
[btnClose setImage:buttonImage forState:UIControlStateNormal];
[btnClose setImage:buttonImageTap forState:UIControlStateSelected];
[btnClose setImage:buttonImageTap forState:UIControlStateHighlighted];      
[btnClose addTarget:self action:@selector(close:) forControlEvents:UIControlEventTouchUpInside];    
[self.view addSubview:btnClose];

推荐答案

我假设为什么不采取 UIControlEventTouchUpInside ：

我在两个不同的ViewControllers中有两个BannerView（广告）。在其中一个它只是在另一个工作正常，我看到如何触摸 UIButton ，并出现第二个图像（较暗）。但选择器没有被击中。然后我意识到， Up -Event是从 UIImageView <的 UISwipeGestureRecognizer 吸收的/ code>下面。一些识别器互相竞争。我搜索了一个概述，看看这些是什么，但一无所获。

I had two "BannerView" (Advertisement) in two different ViewControllers. In one it just worked fine in the other I saw how the UIButton was touched and the second image (darker) appeared. But the selector was not hit. Then I realized, that the Up-Event was absorbt by a UISwipeGestureRecognizer from a UIImageView below. Some Recognizer compete against each other. I searched for an overview to see witch ones these are, but found nothing.

另一个解决方案：
如果你看到ButtonState没有改变你有查看你的按钮是否有查看。

Another solution: If you see that the ButtonState doesn't change u have to look if you have a View over your Button.

这篇关于UIButton UIControlEventTouchUpInside不会触发，但是UIControlEventTouchDown会触发的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！