自定义UIView不显示语音上的辅助功能 [英] Custom UIView Not Showing Accessibility on Voice Over

问题描述

我试图使用openGL视图工作，特别是从cocos2d框架。

I'm trying to get voice over working with an openGL view, specifically from the cocos2d framework.

从Apple Accessibility指南，我按照以下部分：使自定义集装箱视图的内容可访问

From the Apple Accessibility guide I followed this section: Make the Contents of Custom Container Views Accessible

我已经将用于实现非正式UIAccessibilityContainer协议的视图（用于cocos2d人的CCGLView）子类化。

I've subclassed the view (CCGLView for cocos2d people), which is a UIView, to implement the informal UIAccessibilityContainer protocol.

UIAccessibilityContainer实现在我的子类UIView中：

-(NSArray *)accessibilityElements{
return [self.delegate accessibleElements];
}

-(BOOL)isAccessibilityElement{
return NO;
}
-(NSInteger)accessibilityElementCount{
return [self accessibilityElements].count;
}
-(NSInteger)indexOfAccessibilityElement:(id)element{
return [[self accessibilityElements] indexOfObject:element];
}
-(id)accessibilityElementAtIndex:(NSInteger)index{
return [[self accessibilityElements] objectAtIndex:index];
}

这段代码正在调用， - （NSArray * ）acessibilityElements 返回一个UIAccessibilityElements数组。但是，当我触摸屏幕时，控制音色不会出现。

This code is getting called and -(NSArray *)acessibilityElements is returning an array of UIAccessibilityElements. However the voice over controls are not showing up when I touch the screen. Any ideas on what I'm missing or doing wrong?

其他资讯：

我使用故事板并将CCGLView添加到故事板中的UIView。 _director.view是我子类化的CCGLView。

I'm using a storyboard and adding the CCGLView to the UIView in the storyboard. The _director.view is the CCGLView that I subclassed.

 // Add the director as a child view controller.
[self addChildViewController:_director];

// Add the director's OpenGL view, and send it to the back of the view hierarchy so we can place UIKit elements on top of it.
[self.view addSubview:_director.view];
[self.view sendSubviewToBack:_director.view];

有一段时间我怀疑是因为我添加了子视图导致它不显示，但是我也试过在故事板子类中的UIView以相同的方式，但它也不工作。

For a while I suspected that because I added the subview that this was causing it not to show up, but I also tried subclassing the UIView in the storyboard the same way but it was also not working.

这也是我在数组中创建每个UIAccessibilityElement。 p>

Also this is how I am creating each UIAccessibilityElement in the array.

UIAccessibilityElement *elm = [[UIAccessibilityElement alloc] initWithAccessibilityContainer:view];
    elm.accessibilityFrame = f;
    elm.accessibilityLabel = t.letter;
    elm.isAccessibilityElement = YES;
    elm.accessibilityHint = @"Button";
    elm.accessibilityValue = t.letter;
    elm.accessibilityTraits = UIAccessibilityTraitButton;

推荐答案

找到一个解决方案，有这个问题。 - （id）accessibilityElementAtIndex：（NSInteger）index 返回了一个正确的 UIAccessibilityElement ，但看起来它不是由Accessibility API使用它保留。我做了一个强大的NSArray属性来保存UIAccessibilityElements，现在它工作正常。

Found a solution that is working now, in case anyone has this problem. -(id)accessibilityElementAtIndex:(NSInteger)index was returning a properUIAccessibilityElement but it looks like it wasn't getting retained by whatever Accessibility API is using it. I made a strong NSArray property to hold the UIAccessibilityElements and now it is working fine.

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