Question

我正在使用Xcode 8.3.3和Swift 3为使用Cocoa的iMac开发应用程序。我的目标是使用VCgoToWebPage并向用户显示网页。我的程序多次调用此函数，但我看到的唯一网页是最后一个调用的网页。如何在此函数中实现窗口刷新并等待网页完全呈现？

func VCgoToWebPage(theWebPage : String) {
    let url = URL(string: theWebPage)!
    let request = URLRequest(url: url)
    webView.load(request)

    /*The modal box allows the web pages to be seen. Without it, after a series of calls to VCgoToWebPage only the last page called is displayed.  The modal box code is just for debugging and will be removed.  */

    let alert = NSAlert()
    alert.messageText="calling EDGAR page"
    alert.informativeText=theWebPage
    alert.addButton(withTitle: "OK")
    alert.runModal()
}

Answer 1

您可以使用导航委托来确保在尝试加载另一个页面之前完成对页面的导航。让您的班级符合WKNavigationDelegate并将webView.navigationDelegate设置为该班级实例。

var allRequests = [URLRequest]()
func VCgoToWebPage(theWebPage : String) {
    guard let url = URL(string: theWebPage) else {
       return
    }
    let request = URLRequest(url: url)
    if webView.isLoading{
       allRequests.append(request)
    } else {
       webView.load(request)
    }
}
func webView(WKWebView, didFinish: WKNavigation!){
    if let nextRequest = allRequests.first{
       webView.load(nextRequest)
       allRequests.removeFirst()
    }
}

WKWebKit不刷新网页

1 个答案: