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.jb51.net/article/120242.htm第二步：建站一个produc

第一步： 搭建上传类基础工作，具体请看：//www.jb51.net/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脚本之家。