Question

我向其中一个视图控制器中添加了一个注释框

private lazy var toolbarView: KeyboardToolbar = {
    guard let keyboardToolbar = Bundle.main.loadNibNamed("KeyboardToolbar", owner: self, options: nil)?.first as? KeyboardToolbar else {
        fatalError("Error") 
    }
    return keyboardToolbar
}()
override var inputAccessoryView: KeyboardToolbar? {
    return toolbarView
}

现在我在键盘工具栏的快捷文件中

@IBAction func sendPressed(_ sender: Any) {
    //called on click of send button in the comment box
}

如何在viewcontroller代码中编写一个函数，该函数在注释框中的sendPressed上执行。

全键盘工具条码

class KeyboardToolbar: UIView, UITextViewDelegate {

@IBOutlet weak var textView: UITextView!



override func awakeFromNib() {
    super.awakeFromNib()

    textView.delegate = self
    autoresizingMask = .flexibleHeight
    textView.isScrollEnabled = false
    textView.text = "Comment"
    textView.textColor = UIColor.lightGray
    textView.becomeFirstResponder()
}

override var intrinsicContentSize: CGSize {
    let textSize = textView.sizeThatFits(CGSize(width: textView.bounds.size.width, height: CGFloat.greatestFiniteMagnitude))
    return CGSize(width: bounds.width, height: textSize.height)
}
func textViewDidBeginEditing(_ textView: UITextView) {
    if textView.textColor == UIColor.lightGray {
        textView.text = nil
        textView.textColor = UIColor.black
    }
}
func textViewDidChange(_ textView: UITextView) {
    invalidateIntrinsicContentSize()
}

@IBAction func sendPressed(_ sender: Any) {

}
}

Answer 1

您可以为您KeyboardToolBar创建一个自定义协议

protocol KeyboardToolBarDelegates: class {
    func sendPressed(_ text: String)
}

现在您可以在KeyboardToolBar中创建委托对象

class KeyboardToolbar: UIView, UITextViewDelegate {
     @IBOutlet weak var textView: UITextView!
     weak var delegate: KeyboardToolBarDelegates?

     @IBAction func sendPressed(_ sender: Any) {
        delegate?.sendPressed("Pass your text")
     }

}

视图控制器中的实现委托：

class mainViewController: UIViewController, KeyboardToolBarDelegates {
   private lazy var toolbarView: KeyboardToolbar = {
       guard let keyboardToolbar = Bundle.main.loadNibNamed("KeyboardToolbar", owner: self, options: nil)?.first as? KeyboardToolbar else {
          fatalError("Error") 
       }
       keyboardToolbar.delegate = self
       return keyboardToolbar
   }()
   override var inputAccessoryView: KeyboardToolbar? {
      return toolbarView
   }

   //Add protocol method
   func sendPressed(_ text: String) {
       //Method will be called when send pressed from the KeyboardToolBar
   }
}

斯威夫特无法获取回调

1 个答案: