iOS的Cookie存取看我绝对够！！

当前一些公司为了快速出一款app，很多时候采用UINavigationController+WebView或者NavigationController+UITabbarVC+WebView的方式，这样就不可避免的需要使用cookie与Html5交互，下面讲述几种常用情景下cookie的添加方法：

一. UIWebView：

// 工厂类中存储cookie的方法+ (void)saveCookies {    // 创建一个可变字典存放cookie    NSMutableDictionary *fromappDict = [NSMutableDictionary dictionary];    [fromappDict setObject:@"fromapp" forKey:NSHTTPCookieName];    [fromappDict setObject:@"ios" forKey:NSHTTPCookieValue];    // kDomain是公司app网址    [fromappDict setObject:kDomain forKey:NSHTTPCookieDomain];    [fromappDict setObject:kDomain forKey:NSHTTPCookieOriginURL];    [fromappDict setObject:@"/" forKey:NSHTTPCookiePath];    [fromappDict setObject:@"0" forKey:NSHTTPCookieVersion];    // 将可变字典转化为cookie    NSHTTPCookie *cookie = [NSHTTPCookie cookieWithProperties:params];    // 获取cookieStorage    NSHTTPCookieStorage *cookieStorage = [NSHTTPCookieStorage sharedHTTPCookieStorage]    // 存储cookie    [cookieStorage setCookie:cookie];}

• UIWebView使用时间较长，只要在cookieStorage中设置了相应的cookie，每次就会自动带上；
• 但是这样的弊端是随着与H5的交互增加，Cookie占用的空间越来越大，每次交互都夹带大量的cookie，不仅增加服务器端压力，也浪费用户的流量。比如每次交互都夹带5kb的cookie内容，但是真正用到的只有两三百字节。

二. WKWebView

• WKWebView相比于UIWebView：

  • 速度快了一倍，内存却减少为原来的一半；
  • cookie不再是自动携带，需要手动设置；
  • 交互更加顺畅，比如app底部四个tabBar也都是网页的，在UIWebView下点击，整个H5页面都会闪白一下，但是在WKWebView下点击，四个tabBar效果与原生app效果更加类似，不会有闪白现象。
  • 增减了一些代理方法，更方便的进行协议拦截和进度条展示

• 1.在创建的时候存放到WKUserScript中进行添加cookie

    WKWebViewConfiguration *webConfig = [[WKWebViewConfiguration alloc] init];    // 设置偏好设置    webConfig.preferences = [[WKPreferences alloc] init];    // 默认为0    webConfig.preferences.minimumFontSize = 10;    // 默认认为YES    webConfig.preferences.javaScriptEnabled = YES;    // 在iOS上默认为NO，表示不能自动通过窗口打开    webConfig.preferences.javaScriptCanOpenWindowsAutomatically = NO;    // web内容处理池    webConfig.processPool = [[WKProcessPool alloc] init];    // 将所有cookie以document.cookie = 'key=value';形式进行拼接    NSString *cookieValue = [@"document.cookie = 'fromapp=ios';document.cookie = 'channel=appstore';"];    // 加cookie给h5识别，表明在ios端打开该地址    WKUserContentController* userContentController = WKUserContentController.new;    WKUserScript * cookieScript = [[WKUserScript alloc]                                   initWithSource: cookieValue                                   injectionTime:WKUserScriptInjectionTimeAtDocumentStart forMainFrameOnly:NO];    [userContentController addUserScript:cookieScript];    webConfig.userContentController = userContentController;    WKWebView *wkWebView = [[WKWebView alloc] initWithFrame:frame configuration:webConfig];    wkWebView.UIDelegate = wkWebView;    wkWebView.navigationDelegate = wkWebView;

• 2.加载某个url的时候添加cookie

  如果WKWebView在加载url的时候需要添加cookie，需要先手动获取当前NSHTTPCookieStorage中的所有cookie，然后将cookie放到NSMutableURLRequest请求头中

- (void)loadRequestWithUrlString:(NSString *)urlString {    // 在此处获取返回的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重复，先放到字典进行去重，再进行拼接    for (NSString *key in cookieDic) {        NSString *appendString = [NSString stringWithFormat:@"%@=%@;", key, [cookieDic valueForKey:key]];        [cookieValue appendString:appendString];    }    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL URLWithString:urlString]];    [request addValue:cookieValue forHTTPHeaderField:@"Cookie"];    [self loadRequest:request];}

3.AFNetworking

AFNetworking存取cookie就比较常见了，话不多说，都在代码里了

    // 获取AFHTTPRequestOperationManager    AFHTTPRequestOperationManager *operationManager = [AFHTTPRequestOperationManager manager];    // 创建可变字典用于存放Cookie    NSMutableDictionary *cookieDic = [NSMutableDictionary dictionary];    // 存放新添加的cookie    NSMutableString *cookieValue = [NSMutableString stringWithFormat:@"fromapp=ios;"];    // 获取    NSHTTPCookieStorage *cookieJar = [NSHTTPCookieStorage sharedHTTPCookieStorage];    for (NSHTTPCookie *cookie in [cookieJar cookies]) {        [cookieDic setObject:cookie.value forKey:cookie.name];    }    // cookie重复，先放到字典去重，再进行拼接    for (NSString *key in cookieDic) {        NSString *appendString = [NSString stringWithFormat:@"%@=%@;", key, [cookieDic valueForKey:key]];        [cookieValue appendString:appendString];    }    // 将cookie存到请求头中    [operationManager.requestSerializer setValue:cookieValue forHTTPHeaderField:@"Cookie"];    //  拼接url地址    NSString *urlStr = [NSString stringWithFormat:@"%@%@", kHostIP, kPath];    // 设置参数字典    NSDictionary *paraDict = @{                                  @"key" : value                                  };    // 发送请求，处理结果    [operationManager POST:urlStr parameters:paraDict success:^(AFHTTPRequestOperation * _Nonnull operation, id  _Nonnull responseObject) {         NSLog(@"responseObject-->%@", responseObject);    } failure:^(AFHTTPRequestOperation * _Nullable operation, NSError * _Nonnull error) {         NSLog(@"error-->%@", error);    }];

文／si1ence（简书作者）
原文链接：http://www.jianshu.com/p/d2c478bbcca5
著作权归作者所有，转载请联系作者获得授权，并标注“简书作者”。