### 方法 文件控件實例： ```php $file= $formControl->file(); ``` 設置允許添加文件的最大數量：`默認1` ```php $file->max(1); ``` 設置控件標簽：`默認 空` ```php $file->label('文件'); ``` 設置默認值： ```php $file->defaultValue('/uploads/image/57c5dfs235dsfsettsfcc.png'); ``` 設置為必填： ```php $file->required(true); ``` 設置注釋文本： ```php $file->comment('這里是一個注釋文本'); ``` 設置柵欄布局 (默認:12`)： ```php $file->layout(6); ``` 設置ui類： ```php $file->uiClass(['f13']); ``` 設置style樣式： ```php $file->style(); ``` 設置類型場景: ```php $file->scenarioImage(); // 圖片 $file->scenarioVideo(); // 視頻 $file->scenarioAudio(); // 音頻 $file->scenarioOther(); // 其他 ``` ### 鏈式調用 ~~~ $this->formControl->file() ->label('測試一下') ->max(5) ->scenarioImage() ->scenarioVideo() ->scenarioAudio() ->scenarioOther() ->defaultValue('https://tfs.alipayobjects.com/images/partner/TB1TrI3cTVyDuNk6XeaXXXCWXXa') ~~~ ### 代碼示例 ~~~ /** * @return string * @throws \yii\base\InvalidConfigException */ public function actionTree() { if ($this->isPost) { return $this->asOk('success'); } else { $formBuilder = FormBuilder::instance(); $formBuilder->setTitle('xm-select') ->setFormControl([ 'a' => $this->formControl->xselect()->label('xm-select')->defaultValue([1])->data($this->getData())->tips('請選擇一哈!')->filterable()->radio()->clickClose(), 'd' => $this->formControl->xselectTree() ->label('xm-select-tree') ->defaultValue(['6']) ->data($this->getTreeData()) ->tips('請選擇一哈!') ->filterable() //->radio() //->strict(false) ->expandedKeys(true) ->addPluginOption('height', '500px') /*->clickClose()*/, 'e' => $this->formControl->xselectRemote() ->label('xm-select-remote') ->tips('請選擇一哈!') ->filterable() ->radio() ->clickClose() ->toolbar([ 'show' => true, ]) ->addPluginOption('tree', [ 'show' => true, ]) ->url(Url::to('form/remote', '')) ->httpMethod('get'), 'f' => $this->formControl->xselectCascader() ->label('xm-select-cascader') ->defaultValue(['6']) ->data($this->getTreeData()) ->tips('請選擇一哈!') ->radio() ->clickClose() ->strict(false), 'g' => $this->formControl->file() ->label('測試一下') ->max(5) ->scenarioImage() ->scenarioVideo() ->scenarioAudio() ->scenarioOther() ->defaultValue('https://tfs.alipayobjects.com/images/partner/TB1TrI3cTVyDuNk6XeaXXXCWXXa'), ]) ->setResetBtn() ->setSubmitBtn(); return $formBuilder->render(); } } ~~~