sudo gem update --system

然后重启电脑

由于React Native 0.70和macOS Monterrey，最终使用了下面的步骤。

$ brew install ruby

Edit

open -e ~/.zshrc

设置环境变量$PATH。将此添加到~/的末尾。zshrc中。Mac英特尔:

if [ -d "/usr/local/opt/ruby/bin" ]; then
  export PATH=/usr/local/opt/ruby/bin:$PATH
  export PATH=`gem environment gemdir`/bin:$PATH
  eval "$(rbenv init -)"
fi

苹果硅

if [ -d "/opt/homebrew/opt/ruby/bin" ]; then
  export PATH=/opt/homebrew/opt/ruby/bin:$PATH
  export PATH=`gem environment gemdir`/bin:$PATH
  eval "$(rbenv init -)"
fi

不想brew更新你的版本?

$ brew pin ruby

打开终端并运行

curl -sSL https://raw.githubusercontent.com/rvm/rvm/master/binscripts/rvm-installer | bash -s stable

完成后，您需要重新启动您的终端，以便rvm命令能够工作。

现在，运行rvm list known

这显示了Ruby解释器的版本列表。

现在，运行rvm install ruby@latest来获取最新的Ruby版本。

如果在终端中输入ruby -v，则应显示ruby x.x.x.x

如果它仍然显示ruby 2.0。，执行rvm use ruby-X.X命令。X——违约。

Windows 10操作系统的前提条件:

C编译器。你可以使用http://www.mingw.org/ 使命令可用，否则它将抱怨“bash: Make: command not found”。可以通过mingw-get install msys-make命令进行安装 在path环境变量中添加“C:\MinGW\msys\1.0\bin”和“C:\MinGW\bin”

我推荐rbenv* https://github.com/rbenv/rbenv

*如果这符合你的标准:https://github.com/rbenv/rbenv/wiki/Why-rbenv?:

rbenv does… Provide support for specifying application-specific Ruby versions. Let you change the global Ruby version on a per-user basis. Allow you to override the Ruby version with an environment variable. In contrast with RVM, rbenv does not… Need to be loaded into your shell. Instead, rbenv's shim approach works by adding a directory to your $PATH. Override shell commands like cd or require prompt hacks. That's dangerous and error-prone. Have a configuration file. There's nothing to configure except which version of Ruby you want to use. Install Ruby. You can build and install Ruby yourself, or use ruby-build to automate the process. Manage gemsets. Bundler is a better way to manage application dependencies. If you have projects that are not yet using Bundler you can install the rbenv-gemset plugin. Require changes to Ruby libraries for compatibility. The simplicity of rbenv means as long as it's in your $PATH, nothing else needs to know about it.

安装

安装Homebrew http://brew.sh

然后:

$ brew update
$ brew install rbenv ruby-build

# Add rbenv to bash so that it loads every time you open a terminal
echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile
source ~/.bash_profile

$ rbenv install --list
Available versions:
 1.8.5-p113
 1.8.5-p114
 […]
 2.3.1
 2.4.0-dev
 jruby-1.5.6
 […]
$ rbenv install 2.3.1
[…]

设置全局版本:

$ rbenv global 2.3.1
$ ruby -v
ruby 2.3.1p112 (2016-04-26 revision 54768) [x86_64-darwin15]

如果您没有显示更新的版本，那么

$ rbenv rehash

通过在存储库根目录中添加.ruby-version来设置存储库的本地版本:

$ cd ~/whatevs/projects/new_repo
$ echo "2.3.1" > .ruby-version

对于OS X，请访问此链接。

如果你在Mac上，使用rvm来安装特定版本的Ruby。参见如何在MacOS Mojave上使用Ruby版本管理器(RVM)安装Ruby

确保你遵循了所有的步骤。这对我很管用。

在终端:rvm gemset使用全局