ViewController 加载始终相同 link

Question

我是 swift 和 ios.The View Controller 的新手，启动始终相同 link 并且不显示带有第二个按钮的网格菜单 scene.What我在这里做错了吗？我在main.storyboard三个场景。

第一个场景是 navigation.The 第二个场景是一个带有按钮的网格菜单，根据按钮单击将在位于第三个 scene.The 第三个场景的 webview 中打开一个 link包括一个应打开特定 link 的视图，具体取决于步骤 2

中的单击按钮

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate {

    var webView :  WKWebView!
    var webi:String =  "https://www.google.al"

    override func viewDidLoad() {
        print("‼️OMG:viewDidLoad", webi)
        super.viewDidLoad()

        let url = URL(string: webi)!
        webView.load(URLRequest(url: url))

        let refresh = UIBarButtonItem(barButtonSystemItem: .refresh, target: webView, action: #selector(webView.reload))
        toolbarItems = [refresh]
        navigationController?.isToolbarHidden = false
    }

    override func loadView() {
        webView = WKWebView()
        webView.navigationDelegate = self
        view = webView
    }

    @IBAction func Menu1(_ sender: Any) {
        print("‼️OMG:viewDidLoad with menu1")
        webi =  "https://www.menu1.com"

    }

    @IBAction func Menu2(_ sender: Any) {
        print("‼️OMG:viewDidLoad with menu1")
        webi =  "https://www.menu2.com"
    }

    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) {
        title = webView.title
    }
}

Answer 1

您的问题是您更改了 urlStr webi 而没有再次重新加载 webview

func refresh() { 
  let url = URL(string: webi)!
  webView.load(URLRequest(url: url))
}
@IBAction func Menu1(_ sender: Any) {
    print("‼️OMG:viewDidLoad with menu1")
    webi =  "https://www.menu1.com"
    self.refresh()
}

@IBAction func menu2(_ sender: Any) {
    print("‼️OMG:viewDidLoad with menu1") // other link
    webi =  "https://www.menu1.com"
    self.refresh()
}

///

Navigation->buttons Menu VC -> webViewVC

当您在按钮菜单中时

 let vc = ViewController()
 vc.webi = "" // set link according to the clicked button
 self.navigationController?.pushViewController(vc,animated:true)

看这个Demo

ViewController 加载始终相同 link

ViewController is loading always the same link

xcode

uiwebview

ios

swift

swift4