你好。我正在使用 Xcode 开发应用程序。 WKWebView 中的活动指示器在加载内容后保持旋转并且不停止或消失

Posted 2023-02-23

【中文标题】你好。我正在使用 Xcode 开发应用程序。 WKWebView 中的活动指示器在加载内容后保持旋转并且不停止或消失

【英文标题】：Hello. I am working on app using Xcode. The active indicator in WKWebView is keep spining and not stop or disappear after loading content

【发布时间】：2020-11-17 20:56:35

【问题描述】：

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate, WKUIDelegate  

  @IBOutlet weak var webView: WKWebView!
   @IBOutlet weak var activeIndicator: UIActivityIndicatorView!

    override func viewDidLoad() 
        super.viewDidLoad()

        let myURL = URL(string: "https://www.google.com/")
        let myRequest = URLRequest(url: myURL!)
        webView.navigationDelegate = self
        webView.load(myRequest)
       
    
    func webViewDidStartLoad(_ webView: WKWebView) 
        activeIndicator.startAnimating()

    
    func webViewDidFinishLoad(_ webView: WKWebView, didFinish navigation:   WKNavigationDelegate!) 
        DispatchQueue.main.async 
            self.activeIndicator.stopAnimating()
        self.activeIndicator.hidesWhenStopped = true
        self.activeIndicator.isHidden = true
     
    

【参考方案1】：

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate, WKUIDelegate  

    @IBOutlet weak var webView: WKWebView!
    @IBOutlet weak var activeIndicator: UIActivityIndicatorView!

    override func viewDidLoad() 
        super.viewDidLoad()
       
        let myURL = URL(string: "https://www.google.com")
        let myRequest = URLRequest(url: myURL!)
        webView.navigationDelegate = self
        webView.load(myRequest)
        self.webView.addSubview(self.activeIndicator)
        self.activeIndicator.startAnimating()
        self.webView.navigationDelegate = self
        self.activeIndicator.hidesWhenStopped = true
       
    
    
    func webView(_ webView: WKWebView, didFinish navigation: WKNavigation!) 
        activeIndicator.stopAnimating()
    

    func webView(_ webView: WKWebView, didFail navigation: WKNavigation!, withError error: Error) 
        activeIndicator.stopAnimating()
    

【参考方案2】：

尝试下面的代码..在视图中设置活动指示器属性确实加载..更新代码

import UIKit
import WebKit

class ViewController: UIViewController, WKNavigationDelegate, WKUIDelegate  

  @IBOutlet weak var webView: WKWebView!
   @IBOutlet weak var activeIndicator: UIActivityIndicatorView!

    override func viewDidLoad() 
        super.viewDidLoad()

        self.activeIndicator.hidesWhenStopped = true

        let myURL = URL(string: "https://www.google.com/")
        let myRequest = URLRequest(url: myURL!)
        webView.navigationDelegate = self
        webView.load(myRequest)
       
    
    func webViewDidStartLoad(_ webView: WKWebView) 
        activeIndicator.startAnimating()

    
    func webViewDidFinishLoad(_ webView: WKWebView, didFinish navigation:   WKNavigationDelegate!) 
        DispatchQueue.main.async 
            self.activeIndicator.stopAnimating()
     
    

【讨论】：

它还在旋转，没有隐藏