yii2 怎么上传图片

main.css 放在frontendwebcss .onedialog{position:absolute; left: 300px; top: 500px; z-index: 10; width: 700px; height: 400px;border -radius:5px; box-shadow:5px 2px 6px #000; border: 2px solid #666} .oneiframe{ width: 100%; height: 100% }

$(function(){ $('#product-picurl').click(function(){ $('#oneupload').remove(); $('<div>').appendTo($('body')).attr({"class":"onedialog",'id':"oneupload"}); $('<iframe>').appendTo($('#oneupload')).attr({"src":"?r=upload","class":"oneiframe"}) });     var v=$('#product-picurl').val(); if(v){ $('@@##@@').attr({"src":v,"style":"height:50px"}).insertAfter($('#product-picurl')); } });<p>然后在frontendassetsAppAsset.php中注册这两个文件</p> <pre class="brush:php;toolbar:false">class AppAsset extends AssetBundle {     public $basePath = '@webroot';     public $baseUrl = '@web';     public $css = [         'css/site.css',         'css/main.css',     ];     public $js = [         'assets/main.js'     ];     public $depends = [         'yiiwebYiiAsset',         'yiibootstrapBootstrapAsset',     ]; }

<?PHP namespace frontendcontrollers; use Yii; use yiiwebController; use appmodelsUploadForm; use yiiwebUploadedFile; class UploadController extends Controller {     public function actionIndex()     {         $model = new UploadForm();         if (Yii::$app->request-&gt;isPost) {             $model-&gt;file = UploadedFile::getInstance($model, 'file');             if ($model-&gt;file &amp;&amp; $model-&gt;validate()) {                 //$model-&gt;file-&gt;saveAs('uploads/' . $model-&gt;file-&gt;baseName . '.' .$model-&gt;                 file-&gt;extension);                  $fileName='uploads/' . date("YmdHis") . '.' . $model-&gt;file-&gt;extension;                 $model-&gt;file-&gt;saveAs($fileName);             }             echo "<script></script>;";             echo "<script>";             echo "var oneinput=parent.document.getElementById(&#39;product-picurl&#39;);";             echo "parent.document.getElementById(&#39;product-picurl&#39;).value=&#39;".$fileName."&#39;;";             echo "var oneupload = parent.document.getElementById(&#39;oneupload&#39;);";             echo "var img = document.createElement(&#39;img&#39;);";             echo "img.setAttribute(&#39;style&#39;, &#39;height:50px&#39;);";             echo "img.src =&#39;".$fileName."&#39;;";             echo "insertAfter(img,oneinput);";             echo "oneupload.parentNode.removeChild(oneupload)";             echo "</script>";         }         return $this-&gt;render('upload', ['model' =&gt; $model]);     } } ?&gt;

<?PHP namespace appmodels; use yiibaseModel; use yiiwebUploadedFile; /**  * UploadForm is the model behind the upload form.  */ class UploadForm extends Model {     /**      * @var UploadedFile file attribute      */     public $file;     /**      * @return array the validation rules.      */     public function rules()     {         return [             [[&#39;file&#39;], &#39;file&#39;],         ];     } } ?>

<?php use yiiwidgetsActiveForm; ?><?php  $form = ActiveForm::begin([&#39;options&#39; => ['enctype' =&gt; 'multipart/form-data']]) ?&gt; = $form-&gt;field($model, 'file')-&gt;fileInput() ?&gt; <button>Submit</button> <?php  ActiveForm::end() ?>