PROMPT> gem uninstall cocoapods

Select gem to uninstall:
 1. cocoapods-0.32.1
 2. cocoapods-0.33.1
 3. cocoapods-0.36.0.beta.2
 4. cocoapods-0.38.2
 5. cocoapods-0.39.0
 6. cocoapods-1.0.0
 7. All versions
> 6
Successfully uninstalled cocoapods-1.0.0
PROMPT> gem install cocoapods -v 0.39.0
Successfully installed cocoapods-0.39.0
Parsing documentation for cocoapods-0.39.0
Done installing documentation for cocoapods after 1 seconds
1 gem installed
PROMPT> pod --version
0.39.0
PROMPT>

在我的情况下，我不得不从自制程序卸载

brew uninstall cocoapods

如果您需要安装旧版本(例如0.25):

pod _0.25.0_ install

PROMPT> gem uninstall cocoapods

Select gem to uninstall:
 1. cocoapods-0.32.1
 2. cocoapods-0.33.1
 3. cocoapods-0.36.0.beta.2
 4. cocoapods-0.38.2
 5. cocoapods-0.39.0
 6. cocoapods-1.0.0
 7. All versions
> 6
Successfully uninstalled cocoapods-1.0.0
PROMPT> gem install cocoapods -v 0.39.0
Successfully installed cocoapods-0.39.0
Parsing documentation for cocoapods-0.39.0
Done installing documentation for cocoapods after 1 seconds
1 gem installed
PROMPT> pod --version
0.39.0
PROMPT>

在某些情况下，需要在主目录中删除一些隐藏的工件，以便up或降级生效:

rm -rf ~/.cocoapods

要删除您的当前版本，您可以运行:

sudo gem uninstall cocoapods

您可以通过以下命令安装特定版本的可可荚:

sudo gem install cocoapods -v 0.25.0

您可以使用以下命令使用旧的安装版本:

pod _0.25.0_ setup