cocoapods安装问题

sudo gem install cocoapods -v 1.8.4

Password:
Fetching: cocoapods-core-1.8.4.gem (100%)
Successfully installed cocoapods-core-1.8.4
Fetching: claide-1.0.3.gem (100%)
Successfully installed claide-1.0.3
Fetching: cocoapods-deintegrate-1.0.4.gem (100%)
Successfully installed cocoapods-deintegrate-1.0.4
Fetching: cocoapods-downloader-1.3.0.gem (100%)
Successfully installed cocoapods-downloader-1.3.0
Fetching: cocoapods-plugins-1.0.0.gem (100%)
Successfully installed cocoapods-plugins-1.0.0
Fetching: cocoapods-search-1.0.0.gem (100%)
Successfully installed cocoapods-search-1.0.0
Fetching: cocoapods-stats-1.1.0.gem (100%)
Successfully installed cocoapods-stats-1.1.0
Fetching: netrc-0.11.0.gem (100%)
Successfully installed netrc-0.11.0
Fetching: cocoapods-trunk-1.4.1.gem (100%)
Successfully installed cocoapods-trunk-1.4.1
Fetching: cocoapods-try-1.1.0.gem (100%)
Successfully installed cocoapods-try-1.1.0
Fetching: molinillo-0.6.6.gem (100%)
Successfully installed molinillo-0.6.6
Fetching: atomos-0.1.3.gem (100%)
Successfully installed atomos-0.1.3
Fetching: CFPropertyList-3.0.2.gem (100%)
Successfully installed CFPropertyList-3.0.2
Fetching: colored2-3.1.2.gem (100%)
Successfully installed colored2-3.1.2
Fetching: nanaimo-0.2.6.gem (100%)
Successfully installed nanaimo-0.2.6
Fetching: xcodeproj-1.15.0.gem (100%)

ERROR:  While executing gem ... (Gem::FilePermissionError)
    You don't have write permissions for the /usr/bin directory.
Desktop 

解决方案

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

说明gem install cocoapods

需要从rubygems.org上下载cocoapods，所以如果不替换镜像，可能会出现问题

因此：

1.查询镜像列表

gem sources -l 查询镜像列表

2.移除镜像

gem sources -r https://rubygems.org/

3.添加镜像

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