关于图片上传（"AFNetworking", '~> 3.1.0'）

// 获取图片后的操作(这是相册获取图片之后，上传到服务器的具体操作)
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    UIImage* imageSource = [info objectForKey:UIImagePickerControllerOriginalImage];
    if (imageSource){
        [self showLoadingView];
        imageSource = [YgUtils resizeImage:imageSource ByWidth:[UIScreen mainScreen].bounds.size.width];
//        UIImageWriteToSavedPhotosAlbum(imageSource, nil, nil, nil );
        
        
        AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
        NSString *url = [NSString stringWithFormat:@"%@/upload/upload-image",API_HOST_B2B];//拼接地址
        NSData *file = UIImageJPEGRepresentation(imageSource,0.5);//转换成data
        NSDictionary *parameters = @{};
        parameters = [YgUtils clientPrepareHttpParameters:[parameters mutableCopy]];//获取接口默认必传的参数
        
        [manager POST:url parameters:parameters constructingBodyWithBlock:^(id<AFMultipartFormData>  _Nonnull formData) {
            if (file) {
                [formData appendPartWithFileData:file name:@"upfile" fileName:@"upfile.jpg" mimeType:@"image/jpeg"];
            }
        } progress:^(NSProgress * _Nonnull uploadProgress) {
            echo(@"%@",uploadProgress);
        } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {
            echo(@"%@",responseObject);
        } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
            echo(@"%@",error);
        }];
    }
}