yii2 上传图片的示例代码


						第一步： 搭建上传类基础工作，具体请看：//www.zwyuanma.com/article/120242.htm

第二步：建站一个product表，字段id,name,picurl.

第三步：生GII生成PRODUCT 模型，类，视图。

第四步：

main.css 放在frontend\web\css







.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% }



main.js 放在 frontend\web\assets





$(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){

 $('<img>').attr({"src":v,"style":"height:50px"}).insertAfter($('#product-picurl'));

 }

});





然后在frontend\assets\AppAsset.php中注册这两个文件





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 = [

    'yii\web\YiiAsset',

    'yii\bootstrap\BootstrapAsset',

  ];

}





UploadController.php





<?PHP

namespace frontend\controllers;



use Yii;

use yii\web\Controller;

use app\models\UploadForm;

use yii\web\UploadedFile;



class UploadController extends Controller

{

  public function actionIndex()

  {

    $model = new UploadForm();



    if (Yii::$app->request->isPost) {

      $model->file = UploadedFile::getInstance($model, 'file');



      if ($model->file && $model->validate()) {

        //$model->file->saveAs('uploads/' . $model->file->baseName . '.' . $model->file->extension);      

        $fileName='uploads/' . date("YmdHis") . '.' . $model->file->extension;

        $model->file->saveAs($fileName);

      }

      echo "<script src='assets/upload.js'></script>;";

      echo "<script>";

      echo "var oneinput=parent.document.getElementById('product-picurl');";

      echo "parent.document.getElementById('product-picurl').value='".$fileName."';";

      echo "var oneupload = parent.document.getElementById('oneupload');";

      echo "var img = document.createElement('img');";

      echo "img.setAttribute('style', 'height:50px');";

      echo "img.src ='".$fileName."';";

      echo "insertAfter(img,oneinput);";

      echo "oneupload.parentNode.removeChild(oneupload)";

      echo "</script>";

    }



    return $this->render('upload', ['model' => $model]);

  }

}

?>







UploadForm.php





<?PHP

namespace app\models;



use yii\base\Model;

use yii\web\UploadedFile;



/**

 * 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 [

      [['file'], 'file'],

    ];

  }

}

?>







upload.php





<?php

use yii\widgets\ActiveForm;

?>



<?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?>



<?= $form->field($model, 'file')->fileInput() ?>



<button>Submit</button>



<?php ActiveForm::end() ?>







以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持中文源码网。