InputAccessoryView未移除

Question

我正在制作一个iOS应用程序，在其中我使用inputaccessoryview到UIViewController，

问题是

控制器A

   class  ControllerA: UIViewController { 

    override var inputAccessoryView: UIView? {
        return saveView
    }

    override var canBecomeFirstResponder: Bool {
        return true
    }

    @IBAction func openVCB(_ sender: UIButton) {

    let controllerB = controllerB.instantiate(fromAppStoryboard: .main)
        let navigationController = UINavigationController(rootViewController: controllerB)
        navigationController.navigationBar.isTranslucent = false
        self.present(navigationController, animated: true)
    }
}

控制器B

   class  ControllerB: UIViewController { 

    override var inputAccessoryView: UIView? {
        return nil
    }

    override var canBecomeFirstResponder: Bool {
        return false
    }

}

在controller A中，视图按预期工作，但是在controller B中，如果我打开一个键盘并关闭它( AccossoryView )，它将是可见的，它应该是不可见的，有什么想法吗？

全项目InpoutViewTest

Answer 1

遵循这一做法：

var shouldBecomeFirstResponder:Bool = false

override var canBecomeFirstResponder: Bool {
return shouldBecomeFirstResponder
}

也不要忘记在viewWillDisappear中将此标志设置为false

 shouldBecomeFirstResponder = false

Answer 2

我也遇到过这个问题。尝试将其放入您的viewWillDisappear(_ animated: Bool)函数中：

override func viewWillDisappear(_ animated: Bool) {
   if let myInputAccessoryView = saveView {
      myInputAccessoryView.removeFromSuperview()
   }
}

在转换到controller B之前，它应该删除输入附件视图。只需记住返回到controller A时要添加输入附件视图。如果您愿意，也可以尝试myInputAccessoryView.isHidden = true而不是removeFromSuperview()。