Xcode 13.3 warning: “No method declared with Objective-C selector”

本文介绍: 问题描述代码：import UIKi t class ViewCon t roll e r: UIViewCon t roll e r{ override func viewDidLoa d() { super.viewDidLoa d() self.nav i g a ti onIt em.leftBarButtonItem=UIBarButtonIte m( title: “Back“, style: UIBarButtonItem.Style

问题 描述

在这里插入图片描述
代码：

import UIKit

class ViewController: UIViewController{
    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationItem.leftBarButtonItem=UIBarButtonItem(
            title: "Back",
            style: UIBarButtonItem.Style.plain,
            target: self,
            action: Selector("backButtonItemToDismissModal"))  
    }
    
    func backButtonItemToDismissModal(){
      //  self.dismiss(animated:true)
        self.dismiss(animated: true, completion: { () -&gt; Void in
                }
        )
    }
}

解决 方法

import UIKit

class ViewController: UIViewController{
    override func viewDidLoad() {
        super.viewDidLoad()
        self.navigationItem.leftBarButtonItem=UIBarButtonItem(
            title: "Back",
            style: UIBarButtonItem.Style.plain,
            target: self,
            action: #selector(self.backButtonItemToDismissModal))
    }
    
    @objc func backButtonItemToDismissModal(){
      //  self.dismiss(animated:true)
        self.dismiss(animated: true, completion: { () -&gt; Void in
                }
        )
    }
}