views

{
                        title: "发票照片",
                        data: "BILLPIC",
                        edit: {
                        type: "file",
                        options: {
                            "id": "file",
                            "name": "UploadForm[BILLPIC]",
                            "input-name": "BILLPIC",
                            "input-type": "ace_file",
                            "file-name": "BILLPIC",
                        }
                        },
                        
                    },
                    {
                        title: "图书照片",
                        data: "BOOKPIC",
                        edit: {
                        type: "file",
                        options: {
                            "id": "file1",
                            "name": "UploadForm[BOOKPIC]",
                            "input-name": "BOOKPIC",
                            "input-type": "ace_file",
                            "file-name": "BOOKPIC",
                        }
                        },
                        
                    },

Controller
public $strUploadPath = '../uploads/pictures/';
//上传路径


//重新定义上传路径
    public function init(){
            $dirName = $this->strUploadPath.MyFunc_GetNow('dir').'/';       
            \yii\helpers\FileHelper::createDirectory($dirName);
            $this->strUploadPath = $dirName;
    }

vendor\jinxing\yii2-admin\src\models\forms\UploadForm.php
//
 public $BILLPIC;
 public $BOOKPIC;

 public function scenarios()
 {
  return [
   'BILLPIC' => ['BILLPIC'],
   'BOOKPIC' => ['BOOKPIC'],
  ];
 }

 // 验证规则
 public function rules()
 {
  return [  
   [['attachment'], 'file', 'extensions' => \Yii::$app->params['UploadFileExt_BackForm'], 'on' => 'attachment', "checkExtensionByMimeType" => false],
   [['BILLPIC'], 'image', 'extensions' => ['png', 'jpg', 'gif', 'jpeg'], 'on' => 'BILLPIC', "checkExtensionByMimeType" => false],
   [['BOOKPIC'], 'image', 'extensions' => ['png', 'jpg', 'gif', 'jpeg'], 'on' => 'BOOKPIC', "checkExtensionByMimeType" => false],
  ];
 }