iOS 在WKWebView设置首次携带Cookie、持久化设置Cookie方案、亲测可用

项目中多个地方的WKWebView会影响Cookie缓存，建议测试时一个个来测；

1. 第一次登录成功后存储Cookie（需要区分ios11系统以后和之前）

+ (void)saveCookies:(WKWebView *)webView handle:(void (^)(BOOL isSuccessful))saveResponse {
    if (@available(iOS 11.0, *)) {
        WKHTTPCookieStore *shareCookie = webView.configuration.websiteDataStore.httpCookieStore;
        [shareCookie getAllCookies:^(NSArray * _Nonnull cookiesArray) {
             [self dealSaveCookie:cookiesArray handle:saveResponse];
        }];
    } else {
        // Fallback on earlier versions
        NSHTTPCookieStorage * shareCookie = [NSHTTPCookieStorage sharedHTTPCookieStorage];
        [self dealSaveCookie:[shareCookie cookies] handle:saveResponse];
    }
    
   
}


+ (void)dealSaveCookie:(NSArray *)cookiesArray handle:(void (^)(BOOL isSuccessful))saveResponse {
    NSMutableArray *TempCookies = [NSMutableArray array];
    
    [TempCookies addObjectsFromArray:cookiesArray];
    NSData *cookiesData = [NSKeyedArchiver archivedDataWithRootObject:TempCookies];
    [[NSUserDefaults standardUserDefaults] setObject:cookiesData forKey:@"webCookie"];
    [[NSUserDefaults standardUserDefaults] synchronize];
    
    if (saveResponse) {
        saveResponse(YES);
    }
}

2. 在WKWebView的request之前更新Cookie

+ (NSArray *)updateCookies:(WKWebView *)webView {
    NSMutableArray *localCookies =[NSKeyedUnarchiver unarchiveObjectWithData: [[NSUserDefaults standardUserDefaults] objectForKey: @"webCookie"]];

    for (NSHTTPCookie *cookie in localCookies) {
        if (@available(iOS 11.0, *)) {
            WKHTTPCookieStore *cookieStore = webView.configuration.websiteDataStore.httpCookieStore;
            [cookieStore setCookie:cookie completionHandler:nil];
        } else {
            NSHTTPCookieStorage * shareCookie = [NSHTTPCookieStorage sharedHTTPCookieStorage];
            [shareCookie setCookie:cookie];
        }
    }

    return localCookies;
}

3. 在创建WKWebView的时候加入配置实例

- (WKWebView *)webView {
    if (!_webView) {
        _webView = [[WKWebView alloc] initWithFrame:self.view.bounds configuration:self.webConfig];
        [self.view addSubview:self.webView];
    }
    
    return _webView;
}

- (WKWebViewConfiguration *)webConfig {
    if (!_webConfig) {
        _webConfig = [[WKWebViewConfiguration alloc] init];
    }
    return _webConfig;
}

4. 在请求的时候处理如下（解决首次携带Cookie）

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    self.webView.UIDelegate = self;
    self.webView.navigationDelegate = self;
     NSString *string = @"/oauth2/v2/authorize?access_type=offline&response_type=code&client_id=100253825&lang=zh-cn&redirect_uri=hms%3A%2F%2Fredirect_url&scope=https%3A%2F%2Fwww.huawei.com%2Fauth%2Faccount%2Fbase.profile+https%3A%2F%2Fsmarthome.com%2Fauth%2Fsmarthome%2Fskill+https%3A%2F%2Fsmarthome.com%2Fauth%2Fsmarthome%2Fdevices&state=state&display=mobile";
    NSArray *cookiesArray = [HWCookiesManager updateCookies:self.webView];
    
    NSString *string2 = [NSString stringWithFormat:@"https://login.vmall.com%@",string];
    
    //request首次携带Cookie
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:string2]];
    
    for (NSHTTPCookie *cookie in cookiesArray) {
        NSDictionary *cookieDict = [cookie dictionaryWithValuesForKeys:@[NSHTTPCookieName,
                                                                         NSHTTPCookieValue,
                                                                         NSHTTPCookieDomain,
                                                                         NSHTTPCookiePath]];
        NSString *cookieStr = @"";
        for (NSString *cookieKey in cookieDict.allKeys) {
            NSString *keyValue = [NSString stringWithFormat:@"%@=%@;",cookieKey,[cookieDict objectForKey:cookieKey]];
            cookieStr = [cookieStr stringByAppendingString:keyValue];
        }
        // cookie 写入request
        [request addValue:cookieStr forHTTPHeaderField:@"Cookie"];
    }

    // 跨域Cookie注入
    NSDictionary *cookieNewDict = [request allHTTPHeaderFields];
    NSString *cookieNewStr = [NSString stringWithFormat:@"document.cookie = '%@';", [cookieNewDict objectForKey:@"Cookie"]];
    WKUserContentController* userContentController = WKUserContentController.new;
    WKUserScript *cookieInScript = [[WKUserScript alloc] initWithSource:cookieNewStr
                                                              injectionTime:WKUserScriptInjectionTimeAtDocumentStart
                                                           forMainFrameOnly:NO];
    [userContentController addUserScript:cookieInScript];
    self.webView.configuration.userContentController = userContentController;
    
    // 延迟再次更新Cookie
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, 0.1 * NSEC_PER_SEC), dispatch_get_main_queue(), ^{
        [HWCookiesManager updateCookies:self.webView];
        [self.webView loadRequest:request];
    });
}

源码地址：https://github.com/MacleChen/CFCookieWKWebView.git