由于SVN代码提交习惯的问题，都是在SVN客户端直接找到自己添加或者修改的文件commit 上传，往往忽略了依赖的cocapods三方库，从而每次新的代码都需要pod install一下，不过大多数时候不同开发人员用到的pod版本也不同，从而往往造成各种问题，比如Pods文件爆红，找不着或者报出别的错误，大多数时候一般问题网上搜搜都能解决，但有时候按照下面步骤才能解决问题的根源（比如我）
$ which openssl
/usr/bin/openssl
$ openssl version
OpenSSL 0.9.8zh 14 Jan 2016
$ /usr/bin/ruby -e "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/master/install)"
$ brew update
$ brew install openssl
$ brew upgrade openssl
`` If you need to have this software first in your PATH run: echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.bash_profile
$ echo 'export PATH="/usr/local/opt/openssl/bin:$PATH"' >> ~/.bash_profile
$ source ~/.bash_profile
$ which openssl
/usr/local/opt/openssl/bin/openssl
$ openssl version
OpenSSL 1.0.2n 7 Dec 2017
$ brew install rbenv ruby-build
$ echo 'export PATH="$HOME/.rbenv/bin:$PATH"' >> ~/.bash_profile
$ echo 'if which rbenv > /dev/null; then eval "$(rbenv init -)"; fi' >> ~/.bash_profile
$ source ~/.bash_profile
$ rbenv install --list
Available versions:
1.8.5-p52
1.8.5-p113
1.8.5-p114
1.8.5-p115
1.8.5-p231
1.8.6
:
2.5.0-rc1
2.5.0
2.6.0-dev
:
$ rbenv install 2.5.0
$ rbenv versions
* system (set by /Users/username/.rbenv/version)
2.5.0
$ ruby --version
ruby 2.0.0p648 (2015-12-16 revision 53162) [universal.x86_64-darwin16]
$ rbenv global 2.5.0
$ rbenv versions
system
* 2.5.0 (set by /Users/username/.rbenv/version)
$ ruby --version
ruby 2.5.0p0 (2017-12-25 revision 61468) [x86_64-darwin16]
$ gem install cocoapods -n /usr/local/bin
$ which pod
/usr/local/bin/pod
$ pod --version
1.4.0
最后
pod update
这个看着是更新pods，其实是updated ruby version，毕竟pods就是用ruby实现的。。。。。。
