无法将 Jetstream 包安装到 Laravel 项目

Can't install Jetstream package to Laravel project

我使用 Laravel 8 框架。 PHP 版本为 7.4。 运行命令后

composer require laravel/jetstream

我有一些错误：

Your requirements could not be resolved to an installable set of packages.

Problem 1 - laravel/jetstream 1.x-dev requires laravel/fortify ^1.0 -> satisfiable by laravel/fortify[1.x-dev, v1.0.0, v1.0.1, v1.1.0, v1.2.0, v1.2.1, v1.3.0, v1.3.1, v1.4.0, v1.4.1, v1.4.2, v1.4.3, v1.5.0, v1.6.0, v1.6.1, v1.6.2]. - laravel/jetstream v1.5.0 requires laravel/fortify ^1.0 -> satisfiable by laravel/fortify[1.x-dev, v1.0.0, v1.0.1, v1.1.0, v1.2.0, v1.2.1, v1.3.0, v1.3.1, v1.4.0, v1.4.1, v1.4.2, v1.4.3, v1.5.0, v1.6.0, v1.6.1, v1.6.2]. - laravel/jetstream v1.5.1 requires laravel/fortify ^1.0 -> satisfiable by laravel/fortify[1.x-dev, v1.0.0, v1.0.1, v1.1.0, v1.2.0, v1.2.1, v1.3.0, v1.3.1, v1.4.0, v1.4.1, v1.4.2, v1.4.3, v1.5.0, v1.6.0, v1.6.1, v1.6.2]. - laravel/fortify 1.x-dev requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.0.0 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.0.1 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.1.0 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.2.0 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.2.1 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.3.0 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.3.1 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.4.0 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.4.1 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.4.2 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.4.3 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.5.0 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.6.0 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.6.1 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - laravel/fortify v1.6.2 requires bacon/bacon-qr-code ^2.0 -> satisfiable by bacon/bacon-qr-code[2.0.0, 2.0.1, 2.0.2]. - bacon/bacon-qr-code 2.0.2 requires ext-iconv * -> the requested PHP extension iconv is missing from your system. - bacon/bacon-qr-code 2.0.1 requires ext-iconv * -> the requested PHP extension iconv is missing from your system. - bacon/bacon-qr-code 2.0.0 requires ext-iconv * -> the requested PHP extension iconv is missing from your system. - Installation request for laravel/jetstream ^1.5 -> satisfiable by laravel/jetstream[1.x-dev, v1.5.0, v1.5.1].

To enable extensions, verify that they are enabled in your .ini files: - /etc/php/php.ini - /etc/php/conf.d/igbinary.ini - /etc/php/conf.d/redis.ini You can also run php --ini inside terminal to see which files are used by PHP in CLI mode.

Installation failed, reverting ./composer.json to its original content.

我看过一些手册，但没有看到类似的错误。请帮忙。

您需要通过取消注释 extension= iconv 行来启用文件 'etc/php/ini.php' 的扩展 iconv，我不确定 Windows 和 Mac Os 因为我用 Linux