Yii2上传图片插件使用

例子：

1.在表单中：

<?php $form = \yii\widgets\ActiveForm::begin([
        'options'=>[
            'class' => 'form-horizontal',
            'enctype' => 'multipart/form-data'
        ],
        'fieldConfig' => [
            'template' => '{input}{error}',
            'options' => ['class' => 'form-field'],
        ],
    ]); ?>

注意：上传图片必须修改表单提交必须是以二进制数据流的形式；必须配置

'enctype' => 'multipart/form-data'

<?= $form->field($model, 'wms_check_certificate')->label("差异清单截图")->widget(\kartik\widgets\FileInput::className(), [
                'options' => [
                    'accept' => 'image/jpg, image/jpeg, image/png, image/gif',
                    'multiple' => false,
                ],
                'pluginOptions' => [
                    'previewFileType' => 'image',
                    'initialPreview' => !empty($model->wms_check_certificate) ? $model->wms_check_certificate : "",
                    'initialPreviewConfig'=>[],
                    'overwriteInitial'=>true,
                    'initialPreviewAsData' => true,
                    'uploadUrl' => \yii\helpers\Url::toRoute(['upload']),
                    'uploadExtraData' => ['id'=>$model->id],
                    'allowedFileExtensions' => ['jpg', 'png','gif', 'jpeg'],
                    'uploadAsync' => true,
                    'minFileCount' => 0,
                    'maxFileCount' => 1,
                    'showRemove' => true,
                    'showUpload' => true,
                    'showBrowse' => true,
                    'showPreview' => true,
                    'showCaption' => false,
                    'browseOnZoneClick' => true,
                    'fileActionSettings' => [
                        'showZoom' => true,
                        'showUpload' => true,
                        'showRemove' => true,
                    ],
                ],
                'pluginEvents' => [
                    "fileclear" => "function() { $('#wmscheck-wms_check_certificate').val(''); }",
                    "fileuploaded" => "function (event, data, id, index) {
                    console.log(data);
                  }",
                ],
            ]) ?>

注意：

'accept' => 'image/jpg, image/jpeg, image/png, image/gif', 指的是上传的文件的格式必须是jpg，png和gif

'multiple' => false,指的是不支持上传多个文件

'previewFileType' => 'image',指的是上传的文件必须是图片

'initialPreview' => !empty($model->wms_check_certificate) ? $model->wms_check_certificate : "",指的是刚进入页面时默认显示的文件

'uploadUrl' => \yii\helpers\Url::toRoute(['upload']),指的是上传文件的ur地址

'uploadExtraData' => ['id'=>$model->id],指的是上传文件时附带的数据

'allowedFileExtensions' => ['jpg', 'png','gif', 'jpeg'],指的是支持的文件后缀

'uploadAsync' => true,指的是是否以异步形式上传

'showUpload' => true,是否显示上传按钮

'showBrowse' => true,是否显示打开文件对话框按钮

'showRemove' => true,是否显示移除按钮

'showCaption' => false,是否显示方法查看按钮

2.在后台处理上传：

public function actionUpload(){
        $id = $_REQUEST['id'];
        if(!empty($_FILES['WmsCheck']['tmp_name']['wms_check_certificate'])){
            $wms_check_certificate = \common\models\Base::uploadCloud($_FILES['WmsCheck']['tmp_name']['wms_check_certificate'], $_FILES['WmsCheck']['name']['wms_check_certificate'], 'wms');
            $model = \core\models\WmsCheck::findOne(['id'=>$id]);
            if (empty($model)){
                echo json_encode(['msg'=>false]);
            }else{
                $model->wms_check_certificate = $wms_check_certificate;
                $save_handler = $model->save(false);
                echo json_encode(['msg'=>$save_handler]);
            }
        }else{
            echo json_encode(['msg'=>false]);
        }
    }