将带有 XIB 的 UIView 连接到另一个 ViewController

Question

我有一个 UIView，我将在其中为按钮编写操作。在 XIB 文件中，我在键盘上方有一个带有这些按钮的栏。如何将这些按钮连接到具有 UITextView 的 ViewController 以及单击按钮时的操作应在 UITextView 中完成（例如：当我单击“粗体”按钮时，UITextView 中的选定文本应为粗体） [![在此处输入图片描述][2]][2]

import UIKit

protocol NoteViewDelegate {

    func didUpdateNoteWithTitle(newTitle : String, andBody newBody : String)
}

class NewNoteViewController: UIViewController , UITextViewDelegate {

    var delegate : NoteViewDelegate?


    @IBOutlet weak var textBody: UITextView!

    var strBodyText : String!

    override func viewDidLoad() {
        super.viewDidLoad()

        self.textBody.text = self.strBodyText

        self.textBody.becomeFirstResponder()

        self.textBody.delegate = self

        NotificationCenter.default.addObserver(self, selector: #selector(NewNoteViewController.updateTextView(notification:)) , name: Notification.Name.UIKeyboardWillChangeFrame, object: nil)
        NotificationCenter.default.addObserver(self, selector: #selector(NewNoteViewController.updateTextView(notification:)) , name: Notification.Name.UIKeyboardWillHide, object: nil)

        textBody.inputAccessoryView = Bundle.main.loadNibNamed("CustomAccessoryView", owner: self, options: nil)?.first as? UIView
}

    func updateTextView (notification:Notification) {
        let userInfo = notification.userInfo!

        let keyboardEndFrameScreenCoordinates = (userInfo[UIKeyboardFrameEndUserInfoKey] as! NSValue).cgRectValue
        let keyboardEndFrame = self.view.convert(keyboardEndFrameScreenCoordinates, to: view.window)

        if notification.name == Notification.Name.UIKeyboardWillHide {
            textBody.contentInset = UIEdgeInsets.zero

        }else{
            textBody.contentInset = UIEdgeInsets(top: 0, left: 0, bottom: keyboardEndFrame.height, right: 0)

            textBody.scrollIndicatorInsets = textBody.contentInset
    }
        textBody.scrollRangeToVisible(textBody.selectedRange)
}

Answer 1

如何将这些按钮连接到具有 UITextView 的 ViewController

在加载条时，视图控制器在 .xib 文件中有对条的引用。因此它引用了按钮。因此它可以调用addTarget(_:action:for:)来配置按钮动作来调用视图控制器的一个方法，从而可以将文本视图中的文本加粗。