检测UIScrollView上的触摸事件和UIView的组件[放在UIScrollView中] [英] Detect touch event on UIScrollView AND on UIView's components [which is placed inside UIScrollView]

问题描述

我在我的简单故事板IPad项目上有UIViewController，它包含放置在整个表面（1024 x 768）上的UIScrollView。我创建了3个XIB文件，这些文件是我的应用程序在viewDidLoad中启动时加载的UIViews，并将它们添加到UIScrollView中。这3个XIB文件中的每一个只包含一个UIButton。

I have UIViewController on my simple storyboard IPad project which contains UIScrollView which is placed over entire surface (1024 x 768). I have created 3 XIB files which are UIViews which my application loads on start in viewDidLoad and add them into UIScrollView. Each of these 3 XIB files contains only one UIButton.

这是层次结构：

~UIViewController（ UIViewControllerClass 是这个
UIViewController的类）

~ UIViewController (UIViewControllerClass is class for this UIViewController)

~~ UIScrollView（包含3个相同的UIViews）

~~ UIScrollView (contains 3 identical UIViews)

~~~ UIView（ UIViewClass 是此XIB文件的文件所有者）

~~~ UIView (UIViewClass is File's Owner for this XIB file)

~~ ~~ UIButton

~~~~ UIButton

我希望我的UIViewControllerClass能够识别两者：触摸UIScrollView组件上的任何地方并触摸UIScrollView，如果UIButton触摸了UIScrollView中UIView的内部，以获得确切触摸该按钮的信息。

I would like that my UIViewControllerClass becomes aware of both: touch anywhere on UIScrollView component AND if UIScrollView is touched, if UIButton inside of UIView in UIScrollView is touched, to have information that exactly that button is touched.

我在UIViewClass中创建了IBAction，用于触摸UIScrollView中UIView内的UIButton以及当我设置时用户交互在所有元素（UIViewController，UIView和UIScrollView）上启用= YES，此方法应该被调用。

I made IBAction inside UIViewClass for touch on UIButton inside UIView in UIScrollView and when I set User Interaction Enabled = YES on all elements (UIViewController, UIView and UIScrollView) this method is called as it should.

但此时我的UIViewControllerClass并不知道在UIButton上的UIScrollView内发生了触摸。我做了这样的触摸识别器：

But at this point my UIViewControllerClass isn't aware that touch occurred inside UIScrollView on that UIButton. I made touch recognizer like this:

UITapGestureRecognizer *touch = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(handleTouch)];
touch.numberOfTouchesRequired = 1;

并将其添加到UIScrollView组件。通过这种方式，我能够在UIViewControllerClass中检测UIScrollView组件上的触摸事件，但是UIView中的UIButton触摸事件处理程序不再被调用。

and added it to UIScrollView component. In this way I am able to detect touch event on UIScrollView component in UIViewControllerClass, but touch event handler for UIButton in UIView which is inside UIScrollView isn't called anymore.

所以，我需要在UIViewControllerClass中有这两个信息：

So, I need to have these two informations in UIViewControllerClass:

• 触摸UIScrollView组件


• 触摸UIVut中的UIButton，它位于UIScrollView内部（如果触摸了此按钮）

我认为将触摸事件识别器附加到整个UIScrollView组件不是解决方案，因为它禁用了我在UIViewClass中编写的所有触摸事件处理程序。

I suppose that attaching touch event recognizer to entire UIScrollView component isn't solution, since it disables all touch event handlers I wrote inside UIViewClass.

我认为解决方案是以某种方式触及UIScrollView中UIView中的组件应该发送到UIViewControllerClass，但我没有找到办法做到这一点。

I think solution is that somehow touches which are made on components in UIView inside UIScrollView should be sent up to UIViewControllerClass, but I didn't found a way to do this.

如果有人可以帮助我，我将非常感激。提前致谢。

If anyone can help me, I'd be very grateful. Thanks in advance.

点击手势必须将 cancelsTouchesInView 选项设置为否！

Tap gesture must have cancelsTouchesInView option set to NO!

对于我的上述情况，这一行解决了所有问题：

For my case above, this line solves everything:

touch.cancelsTouchesInView = NO;

非常感谢郑。

推荐答案

我不知道这是否适合你，但我已经在这里给出了关于scrollview中视图的触摸事件的答案：

I don't know if this works for you or not, but I've given an answer about touch events for views inside scrollview here:

在UIScrollView中解除键盘

这个想法是告诉scrollView不要吞下滚动视图区域内的所有点击手势。

The idea is to tell the scrollView not to swallow up all tap gestures within the scroll view area.

我会无论如何粘贴代码，希望它能解决你的问题：

I'll paste the code here anyways, hopefully it fixes your problem:

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideKeyboard)];

// prevents the scroll view from swallowing up the touch event of child buttons
tapGesture.cancelsTouchesInView = NO;    

[pageScrollView addGestureRecognizer:tapGesture];

[tapGesture release];

...

// method to hide keyboard when user taps on a scrollview
-(void)hideKeyboard
{
    [myTextFieldInScrollView resignFirstResponder];
}

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