原生與頁面交互，在其中一邊登錄過了，另外一邊需要用cookie來驗證。

如果是要整個WKWebView需要cookie則用這個方法從NSHTTPCookieStorage中拿到一開始存儲到是cookie

 WKWebViewConfiguration *webConfig = [[WKWebViewConfiguration alloc] init];
    // 設置偏好設置
    webConfig.preferences = [[WKPreferences alloc] init];
    // 默認為0
    webConfig.preferences.minimumFontSize = 10;
    // 默認認為YES
    webConfig.preferences.javaScriptEnabled = YES;
    // 在iOS上默認為NO，表示不能自動通過窗口打開
    webConfig.preferences.javaScriptCanOpenWindowsAutomatically = NO;
    
    // web內(nèi)容處理池
    webConfig.processPool = [[WKProcessPool alloc] init];
    // 將所有cookie以document.cookie = 'key=value';形式進行拼接

    /* **********在此處獲取返回的cookie********* */
    NSMutableDictionary *cookieDic = [NSMutableDictionary dictionary];
    NSMutableString *cookieValue = [NSMutableString stringWithFormat:@""];
    NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    
    for (NSHTTPCookie *cookie in [cookieJar cookies]) {
        [cookieDic setObject:cookie.value forKey:cookie.name];
    }
    
    // cookie重復，先放到字典進行去重，再進行拼接
    for (NSString *key in cookieDic) {
        NSString *appendString = [NSString stringWithFormat:@"document.cookie = '%@=%@';", key, [cookieDic valueForKey:key]];
        [cookieValue appendString:appendString];
    }
    
//    NSString *cookieValue = @"document.cookie = 'fromapp=ios';document.cookie = 'channel=appstore';";
    
    // 加cookie給h5識別，表明在ios端打開該地址
    WKUserContentController* userContentController = WKUserContentController.new;
    WKUserScript * cookieScript = [[WKUserScript alloc]
                                   initWithSource: cookieValue
                                   injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:NO];
    [userContentController addUserScript:cookieScript];
    webConfig.userContentController = userContentController;
    
    _webView = [[WKWebView alloc] initWithFrame:CGRectMake(0, 0, SCREEN_WIDTH, SCREEN_HEIGHT-64) configuration:webConfig];
    _webView.UIDelegate = self;
    _webView.navigationDelegate = self;

如果是只是單個頁面URL需要cookie則用這個方法從NSHTTPCookieStorage中拿到一開始存儲到是cookie

   NSMutableDictionary *cookieDic = [NSMutableDictionary dictionary];
    NSMutableString *cookieValue = [NSMutableString stringWithFormat:@""];
    NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];
    
    for (NSHTTPCookie *cookie in [cookieJar cookies]) {
        [cookieDic setObject:cookie.value forKey:cookie.name];
    }
    
    // cookie重復，先放到字典進行去重，再進行拼接
    for (NSString *key in cookieDic) {
        NSString *appendString = [NSString stringWithFormat:@"%@=%@;", key, [cookieDic valueForKey:key]];
        [cookieValue appendString:appendString];
    }
    
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:WeiXiShanHuoLink]];
    [request addValue:cookieValue forHTTPHeaderField:@"Cookie"];

    [_webView loadRequest:request];
    [self.view addSubview:_webView];