VoiceOver导航控制器中后退按钮的辅助功能提示 [英] AccessibilityHint for Back Button in Navigation Controller for VoiceOver

问题描述

有什么方法可以为后退按钮设置accessibilityHint吗？
我希望该旁白先读

Is there any way to set accessibilityHint for back button? I would like that voiceover read first

后退按钮，然后在此提示之后，例如
双击返回以选择建筑物屏幕

"Back Button" and after this Hint e.g. "Double tap to go back to select a building screen"

我正在尝试这样做，但无法正常工作：

I'm trying to do it that way but it's not working:

in viewDidLoad：

in viewDidLoad:

[super viewDidLoad];
// back button without any text just back arrow
UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@""
                                                                      style:UIBarButtonItemStylePlain
                                                                     target:nil
                                                                     action:nil];

self.navigationItem.backBarButtonItem = backBarButtonItem;
self.navigationItem.backBarButtonItem.accessibilityHint = @"Double tap to go back to select a building screen";

推荐答案

而不是使用 backBarButtonItem ，使用 leftBarButtonItem 应该是诀窍。

Instead of using backBarButtonItem, use of leftBarButtonItem should be the trick.

请尝试以下视图中的代码显示后退按钮的控制器：

Try the code below in your view controller that displays the back button :

override func viewDidLoad() {
    super.viewDidLoad()

    let myBackButton = UIBarButtonItem(image: UIImage(named: "chevron"), 
                                       style: .done, 
                                       target: self, 
                                       action: #selector(goBackToThePreviousView(info:)))

    myBackButton.accessibilityLabel = "this is the back button"
    myBackButton.accessibilityHint = "this is my personal hint"

    self.navigationItem.leftBarButtonItem = myBackButton
}

现在，您仅返回按钮的箭头，您可以添加任何内容红色的辅助功能标签或提示。

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