/**
  * @return string|\yii\web\Response 用户登录
  */
 public function actionLogin()
 {
     $model = new UserForm();
     if ($model->load(Yii::$app->request->post(), '')) {
         if ($model->login()) {
             //查询未读消息
             echo "login success";
         } else {
             return "login failure";
         }
     }
 }
 public function actionLogin()
 {
     $model = new UserForm();
     if ($model->load(Yii::$app->request->post())) {
         if ($model->validate()) {
             //验证通过,执行用户登录
             if ($model->login()) {
                 return $this->redirect(['admin/index/index', array('#1/2')]);
             } else {
                 return $this->render('login', ['model' => $model]);
             }
         }
     }
     return $this->render('login', ['model' => $model]);
 }