Yii 怎么接收图片数据 Yii::$app->request->post() [ 2.0 版本 ]

\yii\web\UploadedFile::getInstanceByName('name')

$model = new Model();
$file = \yii\web\UploadedFile::getInstanceByName('name');
$model->file = $file;
$model->save();