如何在WebView中添加Pull to Refresh？ [英] How do I add Pull to Refresh in WebView?

问题描述

我很擅长开发。我正在构建一个WebView，我希望它具有拉动刷新功能。我如何在swift中进行此操作？

I'm very new to developing. I'm building a WebView and I want it to have pull to refresh capabilities. How do I go about doing that in swift?

我在View Controller中的代码是

My code in the View Controller is

@IBOutlet var webView: UIWebView!



override func viewDidLoad() {
    super.viewDidLoad()


    func webViewDidFinishLoad(webView: UIWebView) {
        UIApplication.sharedApplication().networkActivityIndicatorVisible = false
    }

    func webViewDidStartLoad(webView: UIWebView) {
        UIApplication.sharedApplication().networkActivityIndicatorVisible = true
    }

    let url = NSURL (string: "https://www.foo.com");
    let requestObj = NSURLRequest(URL: url!);
    webView.loadRequest(requestObj);
    NSUserDefaults.standardUserDefaults().registerDefaults(["UserAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/601.5.17 (KHTML, like Gecko) Version/9.1 Safari/601.5.17"])


}


override func didReceiveMemoryWarning() {
    super.didReceiveMemoryWarning()

}

}

推荐答案

您的代码有问题，您在 ViewDidLoad 方法中添加了两个Web视图Delegate，该方法必须遵循并检查以下 viewDidLoad 在Web视图中添加Pull to Refresh的代码：

Your code is buggy you added two Web view Delegate in side the ViewDidLoad method that must be following and check the following viewDidLoad code for adding Pull to Refresh in web view:

@IBOutlet var webView: UIWebView!

 var refController:UIRefreshControl = UIRefreshControl()

 override func viewDidLoad() {
    super.viewDidLoad()


    let url = NSURL (string: "https://www.foo.com");
    let requestObj = NSURLRequest(URL: url!);
    webView.loadRequest(requestObj);
    NSUserDefaults.standardUserDefaults().registerDefaults(["UserAgent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/601.5.17 (KHTML, like Gecko) Version/9.1 Safari/601.5.17"])



    refController.bounds = CGRectMake(0, 50, refController.bounds.size.width, refController.bounds.size.height) 
    refController.addTarget(self, action: Selector("mymethodforref:"), forControlEvents: UIControlEvents.ValueChanged)
    refController.attributedTitle = NSAttributedString(string: "Pull to refresh")
    webView.scrollView.addSubview(refController)
    }



    func mymethodforref(refresh:UIRefreshControl){
      webView.reload()
      refController.endRefreshing()
   }
    func webViewDidFinishLoad(webView: UIWebView) {
        UIApplication.sharedApplication().networkActivityIndicatorVisible = false
    }

    func webViewDidStartLoad(webView: UIWebView) {
        UIApplication.sharedApplication().networkActivityIndicatorVisible = true
    }

    override func didReceiveMemoryWarning() {
        super.didReceiveMemoryWarning()

    }

}

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