- (WKWebView *)wkWebView{
  if (!_wkWebView) {
    //设置网页的配置文件
    WKWebViewConfiguration * Configuration = [[WKWebViewConfiguration alloc]init];
    //允许视频播放
    if (@available(iOS 9.0, *)) {
      Configuration.allowsAirPlayForMediaPlayback = YES;
    } else {
      // Fallback on earlier versions
    }
    // 允许在线播放
    Configuration.allowsInlineMediaPlayback = YES;
    // 允许可以与网页交互，选择视图
    Configuration.selectionGranularity = YES;
    // 关于 WKWebView 无法跳转新页面 设置
    Configuration.preferences.javaScriptCanOpenWindowsAutomatically = YES;
    // web内容处理池
    Configuration.processPool = [[WKProcessPool alloc] init];
    //自定义配置,一般用于 js调用oc方法(OC拦截URL中的数据做自定义操作)
    WKUserContentController * UserContentController = [[WKUserContentController alloc]init];
    // 添加消息处理，注意：self指代的对象需要遵守WKScriptMessageHandler协议，结束时需要移除
    [UserContentController addScriptMessageHandler:self name:@"download"];//DownloadPolicy
    // 是否支持记忆读取
    Configuration.suppressesIncrementalRendering = YES;
    // 允许用户更改网页的设置
    Configuration.userContentController = UserContentController;
    
    _wkWebView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, kIs_iPhoneX? self.view.frame.size.height-34:self.view.frame.size.height) configuration:Configuration];
    _wkWebView.backgroundColor = [UIColor colorWithRed:240.0/255 green:240.0/255 blue:240.0/255 alpha:1.0];
    // 设置代理
    _wkWebView.navigationDelegate = self;
    _wkWebView.UIDelegate = self;
    // 垂直滚动
    [_wkWebView.scrollView setShowsVerticalScrollIndicator:NO];
    _wkWebView.scrollView.contentSize = CGSizeMake(self.view.frame.size.width, kIs_iPhoneX? self.view.frame.size.height-34:self.view.frame.size.height);
    //开启手势触摸
    _wkWebView.allowsBackForwardNavigationGestures = YES;
    // 设置 可以前进 和 后退
    //适应你设定的尺寸
    [_wkWebView sizeToFit];
    [self.view addSubview:_wkWebView];
  }
  return _wkWebView;
}

- (void)viewDidLoad {
  [super viewDidLoad];
  NSFileManager *fileManager = [NSFileManager defaultManager];
  NSArray *array1 = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
  NSString *matPath2 = [[array1 objectAtIndex:0] stringByAppendingPathComponent:@"QueHTML"];;
  if (![fileManager fileExistsAtPath:matPath2]) {
    NSString *matString = [[NSBundle mainBundle] pathForResource:@"QueHTML" ofType:@"bundle"];
    dispatch_async(dispatch_get_global_queue(0, 0), ^{
      [fileManager removeItemAtPath:matPath2 error:nil];
      [fileManager copyItemAtPath:matString toPath:matPath2 error:nil];
      dispatch_async(dispatch_get_main_queue(), ^{
        NSLog(@"创建完了");
        if ([[[UIDevice currentDevice] systemVersion] floatValue] < 9.0) {
          [self ios8Load];
        }
        else{
          [self ios9Load];
        }
      });
    });
  }
  else{
    if ([[[UIDevice currentDevice] systemVersion] floatValue] <9.0) {
      [self ios8Load];
    }
    else{
      [self ios9Load];
    }
  }
}
- (void)ios8Load {
  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
  NSString *path = [paths objectAtIndex:0];
  NSString *basePath = [NSString stringWithFormat:@"%@/%@",path,@"QueHTML/"];
  [self.wkWebView loadRequest:[NSURLRequest requestWithURL:[NSURL fileURLWithPath:[NSTemporaryDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"www/QueHTML/index.html"]]]]];
}
- (void)ios9Load {
  NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
  NSString *path = [paths objectAtIndex:0];
  NSString *basePath = [NSString stringWithFormat:@"%@/%@",path,@"QueHTML/"];
  NSString *htmlPath = [NSString stringWithFormat:@"%@/%@",path,@"QueHTML/index.html"];
  NSURL *fileURL = [NSURL fileURLWithPath:htmlPath];
  if (@available(iOS 9.0, *)) {
    [self.wkWebView loadFileURL:fileURL allowingReadAccessToURL:[NSURL fileURLWithPath:basePath isDirectory:YES]];
  }
}

// 接收到服务器跳转请求之后调用
- (void)webView:(WKWebView *)webView didReceiveServerRedirectForProvisionalNavigation:(WKNavigation *)navigation{
  NSLog(@"接收到服务器跳转请求----%@",navigation);
}
// 在收到响应后，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationResponse:(WKNavigationResponse *)navigationResponse decisionHandler:(void (^)(WKNavigationResponsePolicy))decisionHandler{
  NSLog(@"在收到响应后，决定是否跳转---%@",navigationResponse.response.URL.absoluteString);
  //允许跳转
  decisionHandler(WKNavigationResponsePolicyAllow);
  //不允许跳转
  //decisionHandler(WKNavigationResponsePolicyCancel);
}
// 在发送请求之前，决定是否跳转
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler{
  NSLog(@"在发送请求之前，决定是否跳转---%@",navigationAction.request.URL.absoluteString);
  //允许跳转
  decisionHandler(WKNavigationActionPolicyAllow);
  //不允许跳转
  //decisionHandler(WKNavigationActionPolicyCancel);
}
#pragma mark - WKNavigationDelegate
// 页面开始加载时调用
- (void)webView:(WKWebView *)webView didStartProvisionalNavigation:(WKNavigation *)navigation{
  NSLog(@"页面开始加载");
}
// 当内容开始返回时调用
- (void)webView:(WKWebView *)webView didCommitNavigation:(WKNavigation *)navigation{
  NSLog(@"内容开始返回");
}
// 页面加载完成之后调用
- (void)webView:(WKWebView *)webView didFinishNavigation:(WKNavigation *)navigation{
  NSLog(@"页面加载完成");
}
// 页面加载失败时调用
- (void)webView:(WKWebView *)webView didFailProvisionalNavigation:(WKNavigation *)navigation{
  NSLog(@"页面加载失败");
}

- (void)webView:(WKWebView *)webView didReceiveAuthenticationChallenge:(NSURLAuthenticationChallenge *)challenge completionHandler:(void (^)(NSURLSessionAuthChallengeDisposition disposition, NSURLCredential *credential))completionHandler {
  if ([challenge.protectionSpace.authenticationMethod isEqualToString:NSURLAuthenticationMethodServerTrust]) {
    if ([challenge previousFailureCount] == 0) {
      NSURLCredential *credential = [NSURLCredential credentialForTrust:challenge.protectionSpace.serverTrust];
      completionHandler(NSURLSessionAuthChallengeUseCredential, credential);
    } else {
      completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
    }
  } else {
   completionHandler(NSURLSessionAuthChallengeCancelAuthenticationChallenge, nil);
  }
}