MAC_cocoapods switch mirror source_record

• step 1

cd ~/.cocoapods/repos 

• step 2

pod repo remove master

• Step 3 - This image source is Tsinghua source

git clone https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git master

 // 清华源
git clone https://mirrors.tuna.tsinghua.edu.cn/git/CocoaPods/Specs.git master
 // 北京外国语大学
git clone https://mirrors.bfsu.edu.cn/git/CocoaPods/Specs.git master
 // gitclub
git clone https://gitclub.cn/CocoaPods/Specs.git master
//  gitee
git clone https://gitee.com/mirrors/CocoaPods-Specs.git master