Question

我的swift应用程序中有一个webview，它连接的网站上有很多链接。按下链接时，如何进行此操作而不是在同一视图中打开链接，使用后退按钮（导航控制器）在新视图中打开链接。我的viewcontroller.swift代码如下。有什么帮助吗？

     import UIKit
        import Parse
        import PKHUD

        class Home: UIViewController {

            @IBOutlet var homeweb: UIWebView!
            @IBOutlet var HomeActivity: UIActivityIndicatorView!

            var request: NSURLRequest? = NSURLRequest(URL: NSURL(string: "https://google.com")!)
            override func viewDidLoad() {
                super.viewDidLoad()
if navigationController?.viewControllers.count > 1 { navigationItem.leftBarButtonItem = nil }
                PKHUD.sharedHUD.contentView = PKHUDSuccessView()
                PKHUD.sharedHUD.show()
                PKHUD.sharedHUD.dimsBackground.boolValue
                PKHUD.sharedHUD.userInteractionOnUnderlyingViewsEnabled.boolValue
                PKHUD.sharedHUD.hide(afterDelay: 3.0);
                if let request = request {
                    homeweb.loadRequest(request)
                }
            }
        }

        extension Home: UIWebViewDelegate {
            func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
                if request != self.request && navigationType != .Other {
                    if let Home = storyboard?.instantiateViewControllerWithIdentifier("homeview") as? Home {
                        Home.request = request
                        navigationController?.pushViewController(Home, animated: true)
                        return false
                    }
                }

                return true
            }

            override func didReceiveMemoryWarning() {
                super.didReceiveMemoryWarning()
                // Dispose of any resources that can be recreated.
            }

            func webViewDidStartLoad(homeweb: UIWebView)
            {
                HomeActivity.startAnimating()
                UIApplication.sharedApplication().networkActivityIndicatorVisible = true
            }
            func webViewDidFinishLoad(homeweb: UIWebView)
            {
                HomeActivity.stopAnimating()
                UIApplication.sharedApplication().networkActivityIndicatorVisible = false
                title = homeweb.stringByEvaluatingJavaScriptFromString("document.title")
            }

            @IBAction func about(sender: UIBarButtonItem) {

                let alertController = UIAlertController(title: "About Ball00n", message: "Copyright ©2014-2015                 GreenBalloon, LLC                         James Cozzi (jc0z)                  jamescozzi00@gmail.com                    balloonhack.webs.com", preferredStyle: .Alert)

                let Action1 = UIAlertAction(title: "Close", style: UIAlertActionStyle.Default, handler: nil)

                alertController.addAction(Action1)

                self.presentViewController(alertController, animated: true, completion: nil)


            }

        }

Answer 1

将viewcontroller设置为webview的委托，并实现以下方法：

func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
  // check for your specific condition
  if request.URL?.absoluteString == "some link" {
    // push viewcontroller here or perform a segue
    return false // to not follow the link in the webview
  }

  return true
}

现在 - 在了解了你真正想要实现的目标之后:) - 我做了以下事情：

在故事板中设置一个viewcontroller，只需在整个屏幕上显示webview。 ctrl从webview拖动到webviewcontroller并将其设置为其委托。将viewcontroller设置为自定义类“WebViewController”。还将故事板ID设置为“WebViewController”。从webview拖到WebViewController类并连接一个名为“webView”的IBOutlet。最后，您的WebViewController类应如下所示：

import UIKit

class WebViewController: UIViewController {

  @IBOutlet weak var webView: UIWebView!

  var request: NSURLRequest? = NSURLRequest(URL: NSURL(string: "http://YOUR_INITIAL_WEBSITE")!)

  override func viewDidLoad() {
    super.viewDidLoad()

    if navigationController?.viewControllers.count > 1 {
      navigationItem.leftBarButtonItem = nil
    }

    if let request = request {
      webView.loadRequest(request)
    }
  }
}

extension WebViewController: UIWebViewDelegate {
  func webView(webView: UIWebView, shouldStartLoadWithRequest request: NSURLRequest, navigationType: UIWebViewNavigationType) -> Bool {
    if request != self.request && navigationType != .Other {
      if let webViewController = storyboard?.instantiateViewControllerWithIdentifier("WebViewController") as? WebViewController {
        webViewController.request = request
        navigationController?.pushViewController(webViewController, animated: true)
        return false
      }
    }

    return true
  }

  func webViewDidFinishLoad(webView: UIWebView) {
    title = webView.stringByEvaluatingJavaScriptFromString("document.title")
  }
}

至少这是一个开始：）

Webview和导航控制器

1 个答案: