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AFN的简单封装

AFN的简单封装

作者: AliceJordan | 来源:发表于2018-04-05 15:02 被阅读0次

    前记

    最近在隔壁的小组有一个项目,由于好久没有学习iOS,所有想乘机温习下功课,然后就主动请缨,帮助他们一起写项目,因为这个项目是有网络请求的(话说都有吧)然后觉得之前用的学长的一些网络请求有点不是很理解,然后就想自己也来封装一个(其实就是想装逼么。。。)好废话不多说 开整。

    前提

    这个封装是基于AFN(iOS网络请求最好的框架)用的AFN3.0。其实就是感觉就是将复杂重复的代码提取到了一起,然后再统一的调用,这个就是应该所谓的代码高聚合低耦合吧。(不知道这个算不算是设计模式中的工厂模式,请各位知道的大佬给提个醒~)

    正题

    这个类总共封装了9个方法,其中包裹简单的get和post封装,还有上传图片的方法,其中最主要的,也是花时间最长的封装是关于cookie的封装,关于cookie的封装我遇到了一些小的问题等下再跟大家一一到来。废话少说,上代码。

    /**
     注:以下封装只针对json数据
     */
    @interface HelloAFN : NSObject
    
    /**
     时间戳
    
     @return 返回时间戳
     */
    +(NSString *)TheTimeStamp;
    
    /**
     封装get请求
     
     @param URLString URL
     @param parameters 参数字典
     @param succeed 成功后返回的JSON数据
     @param failure 失败后返回的JSON数据
     */
    + (void)GET:(NSString *)URLString parameters:(id)parameters succeed:(void (^)(id responseObject))succeed failure:(void (^)(NSError *error))failure;
    
    
    /**
     封装post请求
     
     @param URLString URL
     @param parameters 参数字典
     @param success 成功后返回的JSON
     @param failure 失败后返回的JSON
     */
    + (void)POST:(NSString *)URLString parameters:(id)parameters success:(void (^)(id responseObject))success failure:(void (^)(NSError *error))failure;
    
    /**
     这个请求过后的请求需要添加cookie(一般是在登陆的请求)
    
     @param URLString 请求URL
     @param parameters 参数
     @param succeed 成功json
     @param failure 是吧json
     @param is 是否需要cookie
     
     */
    + (void)GET:(NSString *)URLString parameters:(id)parameters succeed:(void (^)(id responseObject))succeed failure:(void (^)(NSError *error))failure andWithCookie:(BOOL)is;
    
    /**
     这个请求过后的请求需要添加cookie(一般是在登陆的请求)此方法一般常用
     @param URLString 请求url
     @param parameters 参数
     @param success 成功json
     @param failure 失败json
     @param is 是否需要
     */
    + (void)POST:(NSString *)URLString parameters:(id)parameters success:(void (^)(id responseObject))success failure:(void (^)(NSError *error))failure andWithCookie: (BOOL)is;
    
    
    
    
    /**
     上传图片
     (大的图片有压缩)
     @param dic 除去图片还需要的参数
     @param imgDic 图片的字典
     @param url 上传的url
     @param success 成功回调
     @param faile 失败回调
     */
    +(void)PostThrImagesWithDic:(NSDictionary *)dic WithImg:(NSDictionary *)imgDic url:(NSString *)url success:(void (^)(NSDictionary *))success faile:(void (^)(NSError *))faile;
    
    
    /**
     移除cookie
     */
    +(void)removeAllCookie;
    
    /**
     更新cookie
     */
    +(void)upDataTheCookie;
    
    /**
     上传图片(含有cookie)
    
     @param dic 其他参数
     @param imgDic image字典
     @param url url地址
     @param success 成功回调
     @param faile 失败回调
     @param yes 是否cookie
     */
    +(void)PostThrImagesWithDic:(NSDictionary *)dic WithImg:(NSDictionary *)imgDic url:(NSString *)url success:(void (^)(NSDictionary *))success faile:(void (^)(NSError *))faile is:(BOOL)yes;
    
    @end
    
    

    以上就是我在.h中封装的一些函数头,这些函数的功能已经写得详细了。
    然后就是.m的些内容了

    @implementation HelloAFN
    
    
    
    //时间戳
    + (NSString *)TheTimeStamp{
        //设置一个NSDateFormatter的格式
        NSDateFormatter *formatter = [[NSDateFormatter alloc] init];
        [formatter setDateFormat:@"yyyyMMddHHmmssSSS"];
        return [formatter stringFromDate:[NSDate date]];
    }
    
    //get
    + (void)GET:(NSString *)URLString parameters:(id)parameters succeed:(void (^)(id responseObject))succeed failure:(void (^)(NSError *error))failure
    {
        //创建网络请求管理对象
        AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
        //申明返回的结果是json类型
        manager.responseSerializer = [AFJSONResponseSerializer serializer];
        //申明请求的数据是json类型
        manager.requestSerializer = [AFJSONRequestSerializer serializer];
        //如果报接受类型不一致请替换一致text/html或别的
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"application/json",@"",@"",nil];
        //发送网络请求(请求方式为GET)
        [manager GET:URLString parameters:parameters progress:^(NSProgress * _Nonnull downloadProgress) {
            //会话 可以在这里上传下载 *downloadProgress A block object to be executed when the download progress is updated. Note this block is called on the session queue, not the main queue.
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            succeed(responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            failure(error);
        }];
        
    }
    
    //post
    + (void)POST:(NSString *)URLString parameters:(id)parameters success:(void (^)(id responseObject))success failure:(void (^)(NSError *error))failure{
        AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
        manager.responseSerializer = [AFJSONResponseSerializer serializer];
        //返回非json
        manager.responseSerializer = [AFHTTPResponseSerializer serializer];
        manager.requestSerializer = [AFJSONRequestSerializer serializer];
        
        //image 加解析 image/
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html",nil];
        
        [manager POST:URLString parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {
            //会话 可以在这里上传下载 *downloadProgress A block object to be executed when the download progress is updated. Note this block is called on the session queue, not the main queue.
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            success(responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            failure(error);
        }];
    }
    
    //cookie get
    + (void)GET:(NSString *)URLString parameters:(id)parameters succeed:(void (^)(id responseObject))succeed failure:(void (^)(NSError *error))failure andWithCookie:(BOOL)is
    {
        //创建网络请求管理对象
        AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
        //申明返回的结果是json类型
        manager.responseSerializer = [AFJSONResponseSerializer serializer];
        //申明请求的数据是json类型
        manager.requestSerializer = [AFJSONRequestSerializer serializer];
        //如果报接受类型不一致请替换一致text/html或别的
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"text/html",@"application/json",@"text/json",@"",nil];
    //     需要cookie
        if(is)
        {
            NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
            
                //在afn中设置cookie
                NSString *cookie = [[NSString alloc] init];
                NSDictionary *dic =[NSHTTPCookie requestHeaderFieldsWithCookies:cookies];
                if ([dic[@"Cookie"] isKindOfClass:[NSArray class]])
                {
                    cookie = dic[@"Cookie"][0];
                }
                else{
                    cookie = dic[@"Cookie"];
                }
                [manager.requestSerializer setValue:cookie forHTTPHeaderField:@"Cookie"];
            
    //            NSHTTPCookie *cookie;
    //            for (cookie in cookies)
    //            {
    //                [[NSHTTPCookieStorage sharedHTTPCookieStorage]setCookie:cookie];
    //
    //            }
    //        NSData *cookieData = [NSKeyedArchiver archivedDataWithRootObject:cookies];
            
            NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
            [defaults setObject:cookie forKey:@"Cookie"];
        }
        //发送网络请求(请求方式为GET)
        [manager GET:URLString parameters:parameters progress:^(NSProgress * _Nonnull downloadProgress) {
            //会话 可以在这里上传下载 *downloadProgress A block object to be executed when the download progress is updated. Note this block is called on the session queue, not the main queue.
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            succeed(responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            failure(error);
        }];
    }
    
    //cookie post
    +(void)POST:(NSString *)URLString parameters:(id)parameters success:(void (^)(id))success failure:(void (^)(NSError *))failure andWithCookie:(BOOL)is
    {
        AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
        manager.responseSerializer = [AFJSONResponseSerializer serializer];
        //返回非json
        manager.responseSerializer = [AFHTTPResponseSerializer serializer];
        manager.requestSerializer = [AFJSONRequestSerializer serializer];
        
        //image 加解析 image/
        manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json", @"text/json", @"text/javascript", @"text/html",nil];
    //    装入cookie
        if(is)
        {
            NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
    
    ////            在afn中设置cookie
                            NSString *cookie = [[NSString alloc] init];
                            NSDictionary *dic =[NSHTTPCookie requestHeaderFieldsWithCookies:cookies];
                            if ([dic[@"Cookie"] isKindOfClass:[NSArray class]])
                            {
                                cookie = dic[@"Cookie"][0];
                            }
                            else{
                                cookie = dic[@"Cookie"];
                            }
                            [manager.requestSerializer setValue:cookie forHTTPHeaderField:@"Cookie"];
            
    //            NSHTTPCookie *cookie;
    //            for (cookie in cookies)
    //            {
    //                [[NSHTTPCookieStorage sharedHTTPCookieStorage]setCookie:cookie];
    //                
    //            }
    //            NSData *cookieData = [NSKeyedArchiver archivedDataWithRootObject:cookies];
            
            NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
            [defaults setObject:cookie forKey:@"Cookie"];
        }
        [manager POST:URLString parameters:parameters progress:^(NSProgress * _Nonnull uploadProgress) {
            //会话 可以在这里上传下载 *downloadProgress A block object to be executed when the download progress is updated. Note this block is called on the session queue, not the main queue.
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            success(responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            failure(error);
        }];
    }
    
    
    //images
    +(void)PostThrImagesWithDic:(NSDictionary *)dic WithImg:(NSDictionary *)imgDic url:(NSString *)url success:(void (^)(NSDictionary *))success faile:(void (^)(NSError *))faile
    {
        AFHTTPSessionManager *postAvatarManger = [AFHTTPSessionManager manager];
        postAvatarManger.responseSerializer = [AFHTTPResponseSerializer serializer];
        [postAvatarManger POST:url parameters:dic constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
            for (id key in imgDic)
            {
                UIImage *image = [imgDic objectForKey:key];
                NSData *data = [[NSData alloc] init];
                data = UIImageJPEGRepresentation(image, 1.0);
                CGFloat count = 100;
                while (data.length>102400)
                {
                    count--;
                    data = UIImageJPEGRepresentation(image, count/100);
                }
                //name: 后台规定的key
                //fileName:自己给文件起名
                //mimeType :图片类型
                [formData appendPartWithFileData:data name:[NSString stringWithFormat:@"%@",key] fileName:[NSString stringWithFormat:@"%@.jpeg",key] mimeType:@"image/jpeg"];
            }
            
        } progress:^(NSProgress * _Nonnull uploadProgress) {
            nil;
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            success(responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            faile(error);
        
        }];
        
    }
    //cookie images
    +(void)PostThrImagesWithDic:(NSDictionary *)dic WithImg:(NSDictionary *)imgDic url:(NSString *)url success:(void (^)(NSDictionary *))success faile:(void (^)(NSError *))faile is:(BOOL)yes
    {
        AFHTTPSessionManager *postAvatarManger = [AFHTTPSessionManager manager];
        if(yes)
        {
    //        取出cookie
            NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
            NSString *cookie =[defaults objectForKey:@"Cookie"];
    //        放到请求头中
            [postAvatarManger.requestSerializer setValue:cookie forHTTPHeaderField:@"Cookie"];
        }
        postAvatarManger.responseSerializer = [AFHTTPResponseSerializer serializer];
        [postAvatarManger POST:url parameters:dic constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
            for (id key in imgDic)
            {
                UIImage *image = [imgDic objectForKey:key];
                NSData *data = [[NSData alloc] init];
                data = UIImageJPEGRepresentation(image, 1.0);
                CGFloat count = 100;
                while (data.length>102400)
                {
                    count--;
                    data = UIImageJPEGRepresentation(image, count/100);
                }
                //name: 后台规定的key
                //fileName:自己给文件起名
                //mimeType :图片类型
                [formData appendPartWithFileData:data name:[NSString stringWithFormat:@"%@",key] fileName:[NSString stringWithFormat:@"%@.jpeg",key] mimeType:@"image/jpeg"];
            }
            
        } progress:^(NSProgress * _Nonnull uploadProgress) {
            nil;
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            success(responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            faile(error);
            
        }];
    }
    //清除cookie
    +(void)removeAllCookie
    {
        NSUserDefaults *defatlus = [NSUserDefaults standardUserDefaults];
    //    转化字典
        NSDictionary *dictionary = [defatlus dictionaryRepresentation];
        for (NSString *key in [dictionary allKeys])
        {
            if ([key isEqualToString:@"Cookie"])
            {
                [defatlus removeObjectForKey:key];
                [defatlus synchronize];
            }
        }
    }
    // 更新cookie
    +(void)upDataTheCookie
    {
        NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
        NSString *cookie = [[NSString alloc] init];
        NSDictionary *dic = [NSHTTPCookie requestHeaderFieldsWithCookies:cookies];
        if ([dic[@"Cookie"] isKindOfClass:[NSArray class]])
        {
            cookie = dic[@"Cookie"][0];
        }
        else{
            cookie = dic[@"Cookie"];
        }
        NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
        [defaults setObject:cookie forKey:@"Cookie"];
        [defaults synchronize];
    }
    
    @end
    
    

    里面的代码也有注释,相关的说明。下面就主要说下我遇到的问题吧。和怎么去解决的吧。

    问题好相应的解决

    认识cookie

    我遇到的主要问题就是在cookie的封装。cookie在我的理解就是一种客户端和服务器端保持链接的一种方式吧。主要来说就是,客户端登陆后,服务器端返回cookie标记这个用户,然后客户端再次请求的时候要再请求头中加入cookie,来标识身份,然后通过服务器端就会通过这个cookie来认定客户端。(说成大白话就是,客户端第一次进门的时候服务器端给了一个手牌,然后客户端在瞎逛的时候要拿着这个手牌,不然服务器端就不认他)。这是我对cookie的理解,也不知道是不是准确。

    问题

    我开始用两种方式获取到看cookie。。。。很诡异吧两种关键还不一样感觉。。一种方式我从AFN的相应报头中获取的,另一种我是通过NSHTTPCookie这个iOS对象获取的。当时很懵逼。感觉像是得到了两个东西一样,但是不知道要用哪一个。。。哎很难受啊。于是各种百度。最后看来这个一片文章我的救星其中的一句话给我很重要的帮助

    使用NSHTTPCookie的类方法可以将NSHTTPCookie实例与HTTP cookie header相互转换.

    根据NSHTTPCookie实例数组生成对应的HTTP cookie header

    宛如醍醐灌顶啊。。。

    在iOS中其实是有专门管理cookie的,他们是NSHTTPCookie和NSHTTPCookieStorage 其中NSHTTPCookie是每一个cookie对应的iOS对象,而NSHTTPCookieStorage是一个cookie的容器。这个cookie本来是在响应的包头中的,iOS将其转换为NSHTTPCookie然后再由NSHTTPCookieStorage这个容器来管理。(自己的理解)于是茅塞顿开

    剩下的就撸代码了。
    其中还有几点,我尝试用NSHTTPCookie来设置cookie但是从AFN的请求头并没有cookie,于是尝试了另外一种就是直接给AFN设置请求头,这个效果函数很好的,我没有抓包工具去测试,但是我看了AFN的请求头确实包含了cookie字段。
    AFN查看请求头响应头

    后记

    放假了,清明节没出去,今天在宿舍泡一天美滋滋,明天照常上班学习去,假期最后一天打算和舍友骑着小蓝溜一圈去~~~ (在宿舍写的博客。坐着真是不舒服啊 写的不见谅了 给位大佬,也请大家指出说的不对不好的地方一起努力学习~)
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