public function actionAdminupdatemoment()
 {
     //判断信息是否填写完全
     if (empty($_POST["moment_content"]) || !isset($_POST["moment_content"]) || (empty($_POST["momentid"]) || !isset($_POST["momentid"]))) {
         echo '{"success":false,"msg":"内容填写错误"}';
         return;
     }
     $aimmoment = Moments::findOne($_POST['momentid']);
     $aimmoment->Content = \yii\helpers\Html::encode($_POST['moment_content']);
     $aimmoment->save(false);
     echo '{"success":true,"msg":"添加成功!"}';
 }