Yii 扩展

扩展是专门设计用于在Yii应用程序中使用的包。您可以将自己的代码作为扩展共享，也可以使用第三方扩展来为应用程序添加功能。

使用扩展

大多数扩展都作为Composer包分发。Composer从Packagist（Composer包的存储库）安装包。

要安装第三方扩展，您应该−

将扩展添加到 composer.json 文件中。
运行composer install。

添加日期和时间部件

让我们为我们的项目添加一个漂亮的 datetime 部件。

步骤1 −以以下方式修改基本应用程序模板的 composer.json 文件。

{
   "name": "yiisoft/yii2-app-basic",
   "description": "Yii 2 Basic Project Template",
   "keywords": ["yii2", "framework", "basic", "project template"],
   "homepage": "http://www.yiiframework.com/",
   "type": "project",
   "license": "BSD-3-Clause",
   "support": {
      "issues": "https://github.com/yiisoft/yii2/issues?state=open",
      "forum": "http://www.yiiframework.com/forum/",
      "wiki": "http://www.yiiframework.com/wiki/",
      "irc": "irc://irc.freenode.net/yii",
      "source": "https://github.com/yiisoft/yii2"
   },
   "minimum-stability": "stable",
   "require": {
      "php": ">=5.4.0",
      "yiisoft/yii2": ">=2.0.5",
      "yiisoft/yii2-bootstrap": "*",
      "yiisoft/yii2-swiftmailer": "*",
      "kartik-v/yii2-widget-datetimepicker": "*"
   },
   "require-dev": {
      "yiisoft/yii2-codeception": "*",
      "yiisoft/yii2-debug": "*",
      "yiisoft/yii2-gii": "*",
      "yiisoft/yii2-faker": "*"
   },
   "config": {
      "process-timeout": 1800
   },
   "scripts": {
      "post-create-project-cmd": [
         "yii\\composer\\Installer::postCreateProject"
      ]
   },
   "extra": {
      "yii\\composer\\Installer::postCreateProject": {
         "setPermission": [
            {
               "runtime": "0777",
               "web/assets": "0777",
               "yii": "0755"
            }
         ],
         "generateCookieValidationKey": [
            "config/web.php"
         ]
      },
      "asset-installer-paths": {
         "npm-asset-library": "vendor/npm",
         "bower-asset-library": "vendor/bower"
      }
   }
}

我们已经将依赖项 “kartik-v/yii2-widget-datetimepicker”: “*” 添加到了必需部分。

步骤2 - 现在，在项目根目录下运行composer update来更新所有依赖项。

Yii 扩展

我们刚刚安装了这个扩展。你可以在 vendor/kartik-v/yii2widget-datetimepicker 文件夹内找到它。

步骤3 - 要在页面上显示新安装的小部件，请修改 About 视图文件中的 actionAbout 方法。

<?php
   /* @var this yii\web\View */
   use kartik\datetime\DateTimePicker;
   use yii\helpers\Html;this->title = 'About';
   this->params['breadcrumbs'][] =this->title;
   this->registerMetaTag(['name' => 'keywords', 'content' => 'yii, developing, views,
      meta, tags']);this->registerMetaTag(['name' => 'description',
      'content' => 'This is the description of this page!'], 'description');
?>
<div class="site-about">
   <h1><?= Html::encode($this->title) ?></h1>
   <p>
      This is the About page. You may modify the following file to customize its content:
   </p>
   <?php
      echo DateTimePicker::widget([
         'name' => 'dp_1',
         'type' => DateTimePicker::TYPE_INPUT,
         'value' => '23-Feb-1982 10:10',
         'pluginOptions' => [
            'autoclose'=>true,
            'format' => 'dd-M-yyyy hh:ii'
         ]
      ]);
   ?>
</div>