Question

我有一个包含html格式文本的UIWebView。在文中有些词是链接。单击时，它们应该将另一个视图推送到堆栈。我应该如何编写html链接和相应的objective-c代码才能使其工作？

Answer 1

为UIWebView设置委托，然后您可以处理单击的链接操作：

-(BOOL) webView:(UIWebView *)inWeb shouldStartLoadWithRequest:(NSURLRequest *)inRequest navigationType:(UIWebViewNavigationType)inType {
    if ( inType == UIWebViewNavigationTypeLinkClicked ) {
        [self.navigationController pushViewController:vc animated:YES];
        return NO;
    }

    return YES;
}

Answer 2

Swift 3：完整的UIWebView示例，用于在堆栈中推送视图，并在点击html链接时在包中打开另一个html文件，例如<a href="imprint.html">imprint</a>

class WebViewController: UIViewController {

    @IBOutlet weak var webView: UIWebView!     
    var filename:String?

    override func viewDidLoad() {
        super.viewDidLoad()

        guard filename != nil else {
            fatalError("filename not defined")
        }

        view.backgroundColor =  UIColor.white

        webView.isOpaque = false;
        webView.delegate = self
        webView.backgroundColor = UIColor.clear

        //remove file extension first
        filename = filename!.replace(".html", replacement: "")

        let localfilePath = Bundle.main.url(forResource: filename, withExtension: "html")
        let myRequest = NSURLRequest(url: localfilePath!)
        webView.loadRequest(myRequest as URLRequest)
    }

    ...
}

extension WebViewController: UIWebViewDelegate {

    func webViewDidFinishLoad(_ webView: UIWebView) {
        //set view title from html document
        let pageTitle = webView.stringByEvaluatingJavaScript(from: "document.title")
        navigationItem.title = pageTitle
    }

    func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebViewNavigationType) -> Bool {

         if navigationType == .linkClicked,
            let urlStr = request.url?.absoluteString,
            !urlStr.contains("http://"),
            let filename = request.url?.lastPathComponent, //e.g. imprint.html
            let vc = storyboard?.instantiateViewController(withIdentifier: "WebView") as? WebViewController{

            vc.filename = filename

            self.navigationController?.pushViewController(vc, animated: true)

            return false
        }

        return true
    }
}

如何在UIWebView中使用html链接将视图推送到堆栈？

2 个答案: