Ios UISearchBar“访问明文”按钮以实现UIC的可访问性

对于符合UIAccessibility和VoiceOver的个人应用程序，我需要更改UISearchBar中明文按钮（灰色十字）的UIAccessibility标签

我现在不知道如何访问这个元素

我试着做些类似的事情

class ViewController: UIViewController, UISearchBarDelegate
{
  @IBOutlet weak var searchBar: UISearchBar!

  weak var btnCancel: UIButton?

  override func viewDidLoad()
  {
    super.viewDidLoad()

    for subView in searchBar.subviews
    {
      for subSubView in subView.subviews
      {
        if subSubView.isKindOfClass(UIButton)
        {
          btnCancel = subSubView as? UIButton

          btnCancel?.isAccessibilityElement = true

          btnCancel?.accessibilityLabel =  NSLocalizedString("Clear Text", comment: "")
        }
      }
    }
  }
}

我在viewDidLoad上尝试它；搜索栏文本更改；搜索并开始编辑

我从来没找到纽扣

欢迎您的帮助

解决方案：

@IBOutlet weak var searchBar: UISearchBar!

  override func viewDidLoad()
  {
    super.viewDidLoad()

    for subView in searchBar.subviews
    {
      for sView in subView.subviews
      {
        if let textField = sView as? UITextField,
           let clearButton = textField.valueForKey("clearButton") as? UIButton
        {
          clearButton.isAccessibilityElement = true

          clearButton.accessibilityLabel =  NSLocalizedString("Clear Text", comment: "")
        }
      }
    }
  }