iOS 使用AFNet上传图片(多张)

使用下面方法，上传

1.

- (NSURLSessionDataTask *)POST:(NSString *)URLString
                    parameters:(id)parameters
     constructingBodyWithBlock:(void (^)(id <AFMultipartFormData> formData))block
                      progress:(nullablevoid (^)(NSProgress *_Nonnull))uploadProgress
                       success:(void (^)(NSURLSessionDataTask *task,id responseObject))success
                       failure:(void (^)(NSURLSessionDataTask *task,NSError *error))failure- (NSURLSessionDataTask *)POST