yii2.0 点击验证码图片不刷新

修改vender\yiisoft\yii2\captcha\CaptchaAction下的run方法

public function run()
{
    if (Yii::$app->request->getQueryParam(self::REFRESH_GET_VAR) !== null) {
        // AJAX request for regenerating code
        $code = $this->getVerifyCode(true);
        Yii::$app->response->format = Response::FORMAT_JSON;
        return [
            'hash1' => $this->generateValidationHash($code),
            'hash2' => $this->generateValidationHash(strtolower($code)),
            // we add a random 'v' parameter so that FireFox can refresh the image
            // when src attribute of image tag is changed
            'url' => Url::to([$this->id, 'v' => uniqid()]),
        ];
    } else {
        $this->setHttpHeaders();
        Yii::$app->response->format = Response::FORMAT_RAW;
        return $this->renderImage($this->getVerifyCode());
    }
}

将

return $this->renderImage($this->getVerifyCode());这行代码getVerifyCode()函数加一个参数true改为：

getVerifyCode(true)