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更新 Xcode 14.0 之后，使用 pod 命令，提示Xcode 版本和 CocoaPods 的版本不匹配，需要更新 CocoaPods
proj] Unknown object version (56). (RuntimeError)
11: from /Users/sinking/.rvm/gems/ruby-2.7.0/bin/ruby_executable_hooks:24:in `<main>'
10: from /Users/sinking/.rvm/gems/ruby-2.7.0/bin/ruby_executable_hooks:24:in `eval'
9: from /Users/sinking/.rvm/gems/ruby-2.7.0/bin/pod:23:in `<main>'
8: from /Users/sinking/.rvm/gems/ruby-2.7.0/bin/pod:23:in `load'
7: from /Users/sinking/.rvm/gems/ruby-2.7.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
6: from /Users/sinking/.rvm/gems/ruby-2.7.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
5: from /Users/sinking/.rvm/gems/ruby-2.7.0/gems/claide-1.0.3/lib/claide/command.rb:324:in `run'
4: from /Users/sinking/.rvm/gems/ruby-2.7.0/gems/claide-1.0.3/lib/claide/command.rb:337:in `rescue in run'
3: from /Users/sinking/.rvm/gems/ruby-2.7.0/gems/claide-1.0.3/lib/claide/command.rb:396:in `handle_exception'
2: from /Users/sinking/.rvm/gems/ruby-2.7.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:66:in `report_error'
1: from /Users/sinking/.rvm/gems/ruby-2.7.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:34:in `report'
我尝试下面命令，安装预发行版本，但是不行
gem install cocoapods --pre
最终解决方法是安装新的 ruby (3.0.0 版本).
ps: rvm 是 ruby 管理命令，如果电脑没安装，具体安装方法可自行去搜索
rvm install 3.0.0
如果想看 3 版本最新，可输入 rvm list known 查看最新版本
输入命令，查看本地是否安装成功
rvm list
看到 3.0.0 版本即为成功，然后切换默认版本为 3.0.0.
rvm use 3.0.0 --default
输入 rvm list 查看一下是否切换成功
rvm list
ruby-2.7.0 [ x86_64 ]
=* ruby-3.0.0 [ x86_64 ]
3.0.0 版本前面出现 =* 即为切换成功，这时候
切换了 ruby，所以要重新下载 CocoaPods.
gem install -n /usr/local/bin cocoapods
下载完成，就可以去使用 pod 了
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