1.需要服務器進行配置Content-Type 為gzip
2.AFN框架客戶端使用下列代碼即可

 // 1.創(chuàng)建請求管理對象
    AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
    
    [manager.requestSerializer setValue:@"gzip" forHTTPHeaderField:@"Accept-Content"];
    [manager.requestSerializer setValue:@"application/json" forHTTPHeaderField:@"Content-Type"];
    manager.requestSerializer.timeoutInterval = timeoutInterval;
    
    manager.responseSerializer = [AFHTTPResponseSerializer serializer];
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObjects:@"application/json",@"application/json;charset=utf-8", @"text/json", @"text/javascript", @"text/plain",@"text/html", nil];
    
    [manager POST:url parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {
        
//        NSStringEncoding enc = CFStringConvertEncodingToNSStringEncoding(kCFStringEncodingISOLatin1);
        
        NSString* strdata = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSData *data = [strdata dataUsingEncoding:NSUTF8StringEncoding];
        
        
        NSMutableString *strM = [[NSMutableString alloc] initWithBytes:[data bytes] length:[data length] encoding:NSUTF8StringEncoding];
        
        NSData* jsonData = [strM dataUsingEncoding:NSUTF8StringEncoding];
        NSDictionary* dict = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:nil];
     //   NSDictionary *dict = [NSDictionary initWithJsonString:strM.copy];
        
        if (success) {
            success(dict);
        }
    } failure:^(NSURLSessionDataTask *task, NSError *error) {
        if (failure) {
            failure(error);
        }
    }];