yii2 怎么上传图片

框架(架构)  /  管理员 发布于 7年前   326

第一步：搭建上传类基础工作，具体请看：http://www.yiichina.com/tutorial/328

第二步：建站一个product表，字段id,name,picurl.

第三步：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

<?PHPnamespace 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

<?PHPnamespace 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

<?phpuse yii\widgets\ActiveForm;?><?php $form = ActiveForm::begin(['options' => ['enctype' => 'multipart/form-data']]) ?><?= $form->field($model, 'file')->fileInput() ?><button>Submit</button><?php ActiveForm::end() ?>

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