AFNN用到的一些方法

//普通请求，返回值为JSON类型，代理方式回调
- (void)requestForType:(NetworkRequestType)type info:(NSDictionary *)requestInfo target:(id)target successSel:(NSString *)successSelector failedSel:(NSString *)failedSelector;
//普通请求，返回值为JSON类型，Block方式回调
- (void)requestForType:(NetworkRequestType)type info:(NSDictionary *)requestInfo andBlock:(void (^)(id response, NSError *error))block;
//更新用户资料，返回值为字符串，Block方式回调
- (void)updateUserInfoForType:(NetworkRequestType)type info:(NSDictionary *)requestInfo andBlock:(void (^)(NSString *result, NSError *error))block;
//上传图片，POST方式，返回值为字符串，Block方式回调
- (void)updateImages:(NSArray *)imageArray type:(NetworkRequestType)type info:(NSDictionary *)requestInfo andBlock:(void (^)(NSString *result, NSError *error))block;