最近在做IOS的开发，网络请求采用了AFNetworking框架，由于服务器端是接收JSON的数据，新框架不太熟，网上搜了好久才解决，记录一下。
    NSMutableDictionary *dict=[[NSMutableDictionary alloc]init];
    [dict setObject:@"apple" forKey:@"brand"];NSString *url=@"http://xxxxx";//你的接口地址   AFHTTPRequestOperationManager *manager = [A    FHTTPRequestOperationManager manager];
    manager.responseSerializer = [AFJSONResponseSerializer serializer];//申明返回的结果是json类型
    manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];//如果报接受类型不一致请替换一致text/html或别的
    manager.requestSerializer=[AFJSONRequestSerializer serializer];//申明请求的数据是json类型
    [manager POST:url parameters:dict success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSLog(@"%@", responseObject);
    } failure:^(AFHTTPRequestOperation *operation, NSError *error){
        NSLog(@"Error: %@", error);
    }
    ];