網站跨域問題解決+

 public function behaviors()
    {
          return ArrayHelper::merge([
                [
                //Cors 過濾器必須在 Authentication / Authorization filters之前
                   //過濾器可以用來幫助 Yii2 配置是否允許跨域請求         
                        'class' => Cors::className(),
                        'cors' => [
                            'Origin' => ['*'],//允許的源.
                            'Access-Control-Request-Method' => ['GET','POST','DELETE','OPTIONS','PUT'],//允許請求方法
                            'Access-Control-Request-Headers'=>['*']//允許的請求頭
                        ],

                ],
                //授權
                'authenticator' =>[
                            'class' => CompositeAuth::className(),
                            'authMethods' => [
                                HttpBearerAuth::className(),
                            ],
                            'optional'  => [ 'login','authlogin','codelogin'],

                ]
        ], parent::behaviors());
    }