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]);
}
}