从UIWebView迁移到WKWebView [英] Migrating from UIWebView to WKWebView

问题描述

在我的应用程序中我正在从UIWebView迁移到WKWebView，如何为WKWebView重写这些函数？

in my app I'm migrating from UIWebView to WKWebView , how can I rewrite these function for WKWebView?

    func webViewDidStartLoad(webView: UIWebView){}
    func webViewDidFinishLoad(webView: UIWebView){}

and

    func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        print("webview asking for permission to start loading")
        if navigationType == .LinkActivated && !(request.URL?.absoluteString.hasPrefix("http://www.myWebSite.com/exemlpe"))!{
            UIApplication.sharedApplication().openURL(request.URL!)
            print(request.URL?.absoluteString)
            return false
        }
        print(request.URL?.absoluteString)
        lastUrl = (request.URL?.absoluteString)!

        return true
    }


    func webView(webView: UIWebView, didFailLoadWithError error: NSError?) {
        print("webview did fail load with error: \(error)")
        let testHTML = NSBundle.mainBundle().pathForResource("back-error-bottom", ofType: "jpg")
        let baseUrl = NSURL(fileURLWithPath: testHTML!)

        let htmlString:String! = "myErrorinHTML"
        self.webView.loadHTMLString(htmlString, baseURL: baseUrl)
    }

推荐答案

UIWebView => WKWebView等效

UIWebView => WKWebView Equivalent

didFailLoadWithError => didFailNavigation
webViewDidFinishLoad => didFinishNavigation
webViewDidStartLoad => didStartProvisionalNavigation
shouldStartLoadWithRequest => decidePolicyForNavigationAction

关于 shouldStartLoadWithRequest 你可以写：

func webView(webView: WKWebView, decidePolicyForNavigationAction navigationAction: WKNavigationAction, decisionHandler: ((WKNavigationActionPolicy) -> Void)) {
    print("webView:\(webView) decidePolicyForNavigationAction:\(navigationAction) decisionHandler:\(decisionHandler)")

    switch navigationAction.navigationType {
        case .LinkActivated:
        if navigationAction.targetFrame == nil {
            self.webView?.loadRequest(navigationAction.request)
        }
        if let url = navigationAction.request.URL where !url.absoluteString.hasPrefix("http://www.myWebSite.com/example") {
            UIApplication.sharedApplication().openURL(url)
            print(url.absoluteString)
            decisionHandler(.Cancel)
        return
        }
        default:
            break
    }

    if let url = navigationAction.request.URL {
        print(url.absoluteString)
    }
    decisionHandler(.Allow)
}

对于 didFailLoadWithError ：

func webView(webView: WKWebView, didFailNavigation navigation: WKNavigation, withError error: NSError) {
    print("webView:\(webView) didFailNavigation:\(navigation) withError:\(error)")
    let testHTML = NSBundle.mainBundle().pathForResource("back-error-bottom", ofType: "jpg")
    let baseUrl = NSURL(fileURLWithPath: testHTML!)

    let htmlString:String! = "myErrorinHTML"
    self.webView.loadHTMLString(htmlString, baseURL: baseUrl)
}

这篇关于从UIWebView迁移到WKWebView的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！