如何在UIWebView中关闭页面并返回应用程序

Question

在我的应用程序中，通过按下我想在全屏幕上打开UIWebView的按钮， UIWebView将加载一个HTML页面，该页面将保存一个按钮，该按钮将关闭UIWebView并返回到应用程序。

问题是我无法使按钮关闭页面并返回应用程序。 我试图parent.history.back()和history.back和几个版本self.close()但似乎没有任何工作（BTW它在浏览器中运行，但不会从UIWebView 。

任何想法？ 谢谢-Z

Answer 1

[UIWebViewDelegate][1] has your answer

    - (BOOL)webView:(UIWebView*)webView shouldStartLoadWithRequest:(NSURLRequest*)request            
                                    navigationType:(UIWebViewNavigationType)navigationType {
        if (request.URL == "SOME URL TO CLOSE WINDOW") {
            //do close window magic here!!
            [self stopLoading];
            return NO;
        }
        return YES;
    }
-(void)stopLoading{
    [_webView removeFromSuperview];
}

  [1]: http://developer.apple.com/library/ios/#documentation/uikit/reference/UIWebViewDelegate_Protocol/Reference/Reference.html

Answer 2

针对Swift 3进行了更新：

如果要关闭UIWebView页面并返回应用程序，请使用下面的代码：

import UIKit

class ViewController: UIViewController, UIWebViewDelegate{

    @IBOutlet weak var mWebView: UIWebView!

    override func viewDidLoad() {
        super.viewDidLoad()
        mWebView.delegate = self
    }

    override func viewWillAppear(_ animated: Bool) {
        self.loadWebView()
    }

    func loadWebView()  {
        mWebView.loadRequest(URLRequest(url: URL(string: "https://stackoverflow.com/")!))
    }

    func webView(_ webView: UIWebView, shouldStartLoadWith request: URLRequest, navigationType: UIWebViewNavigationType) -> Bool {
        print("request: \(request.description)")
        if request.description == "https://stackoverflow.com/users/login"{
            //do close window magic here!!
            print("url matches...")
            stopLoading()
            return false
        }
        return true
    }

    func stopLoading() {
        mWebView.removeFromSuperview()
        self.moveToVC()
    }

    func moveToVC()  {
        print("Write code where you want to go in app")
        // Note: [you use push or present here]
        let vc = 
          self.storyboard?.instantiateViewController(withIdentifier: 
          "storyboardID") as! YourViewControllerName
        self.navigationController?.pushViewController(vc, animated: true)
    }
}