yii2 怎么上傳圖片

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中注冊這兩個文件</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() ?>