一、重装cocoapods

1.卸载原有cocoapods

rm -fr ~/.cocoapods/

2.查询Ruby源地址为：https://gems.ruby-china.com/

gem sources -a https://gems.ruby-china.com/
gem source -l

3.安装homebrew (时间略久，等就完事儿)

/bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"

4.安装rvm

curl -L get.rvm.io | bash -s stable

source ~/.bashrc

source ~/.bash_profile

5.安装ruby

rvm install 3.2.2

6.设置成默认版本

rvm use 3.2.2 --default

7.安装cocoapods

sudo gem install -n /usr/local/bin cocoapods

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pod setup

finish
遇到 command not found: pod
直接卸载重装

二、repo源

目前有两种常用的repo，一个master，一个trunk，分情况使用，如果trunk不能拉取可在podfile中添加
source "https://github.com/CocoaPods/Specs.git"
使用master源拉取代码，然后再行 pod install

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问题：如果在pod update时报错 CocoaPods was not able to update the cocoapods repo. If this is an unexpected issue and persists you can inspect it running pod repo update --verbose

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解决：
1.查看repo

pod repo

2.只保留master和trunk，把不用的repo删除

pod repo remove cocoapods 

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3.再次拉取 恭喜成功

pod install

此为将trunk源更换为master拉取

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