选择下拉列表中的Prestashop php formfield设置值

我有一个用FormField从php创建的表单，还有一个country字段，其中包含一个国家列表。我的问题是如何从php而不是html模板中设置要选择的国家（因为它在tpl文件中被创建为{form_field field=$field}）

这是我的密码：

$countries = Country::getCountries($this->context->language->id);
    $format['country'] = (new FormField)
        ->setName('country')
        ->setType('countrySelect')
        ->setLabel(
            $this->translator->trans(
                'Country', [], 'Shop.Forms.Labels'
            )
        )
        ->setRequired(true)
    ;

    foreach ($countries as $country) {
        $format['country']->addAvailableValue(
            $country['id_country'],
            $country['country']
        );
    }

如果我可以从php设置它，那将是很棒的，因为我不想更改核心文件或其他东西。提前感谢。

（新表单字段）->setValue（$value）

应该完成这项工作，请查看

classes/form/FormField.php

public function setValue($value)

或

现在，如果计划设置相对必需值，则需要在类内创建一个私有变量：

              $countries = Country::getCountries($this->language->id,true);
                $format['country'] = (new FormField())
                    ->setName('country')
                    ->setType('countrySelect')
                    ->setLabel($this->translator->trans('Country', [], 'Shop.Forms.Labels'))
                    ->setRequired($this->country_is_required)
                    ->setValue($this->country);
                    foreach ($countries as $country) {
                        $format['country']->addAvailableValue(
                            $country['id_country'],
                            $country['name']);
                    }

或设置不同的私有变量：

          $countries = Country::getCountries($this->language->id,true);
            $format['country'] = (new FormField())
                ->setName('country')
                ->setType('countrySelect')
                ->setLabel($this->translator->trans('Country', [], 'Shop.Forms.Labels'))
                ->setRequired($this->password_is_required)
                ->setValue($this->country);
                foreach ($countries as $country) {
                    $format['country']->addAvailableValue(
                        $country['id_country'],
                        $country['name']);
                }

              $countries = Country::getCountries($this->language->id,true);
                $format['country'] = (new FormField())
                    ->setName('country')
                    ->setType('countrySelect')
                    ->setLabel($this->translator->trans('Country', [], 'Shop.Forms.Labels'))
                    ->setRequired($this->country_is_required)
                    ->setValue($this->country);
                    foreach ($countries as $country) {
                        $format['country']->addAvailableValue(
                            $country['id_country'],
                            $country['name']);
                    }

          $countries = Country::getCountries($this->language->id,true);
            $format['country'] = (new FormField())
                ->setName('country')
                ->setType('countrySelect')
                ->setLabel($this->translator->trans('Country', [], 'Shop.Forms.Labels'))
                ->setRequired($this->password_is_required)
                ->setValue($this->country);
                foreach ($countries as $country) {
                    $format['country']->addAvailableValue(
                        $country['id_country'],
                        $country['name']);
                }