1.移除现有Ruby默认源
$gem sources --remove https://rubygems.org/
2.使用新的源
$gem sources -a https://ruby.taobao.org/
3.验证新源是否替换成功
$gem sources -l
4.安装CocoaPods
(1) $sudo gem install cocoapods 备注：苹果系统升级 OS X EL Capitan 后改为$sudo gem install -n /usr/local/bin cocoapods
(2) $pod setup
5.更新gem
$sudo gem update --system
6. 新建工程，并在终端用cd指令到文件夹内
$pod search 第三方
7.新建文件 vim “Podfile”，
$vim Podfile
写入以下内容并保存 小提示：（终端vim文件 按 i 可编辑 ，esc 退出编辑，：wq 可保存退出）
platform:ios, '6.0'
pod 'AFNetworking', '~>2.3.1'<-------第三方
8.导入第三方库
$pod install
9.退出终端
以下是我用以前的安装流程安装时出现的一些错误
终端 cocoapods 下载bug调试：
错误1：
Error fetching http://ruby.taobao.org/:
bad response Not Found 404 (http://ruby.taobao.org/specs.4.8.gz)
解决方案：把安装流程中 $gem sources -a http://ruby.taobao.org/ ---改为---->$gem sources -a https://ruby.taobao.org/
错误2：
ERROR: While executing gem ... (Errno::EPERM)
Operation not permitted - /usr/bin/pod
解决方案：苹果系统升级OS X EL Capitan后会出现的插件错误，将安装流程 4.安装CocoaPods 的 (1)sudo gem install cocoapods ——>改为sudo gem install -n /usr/local/bin cocoapods
错误3：
[!] Unable to satisfy the following requirements: - `AVOSCloud (~>3.1.6.3)` required by `Podfile`
Specs satisfying the `AVOSCloud (~>3.1.6.3)` dependency were found, but they required a higher minimum deployment target.
解决方案：安装流程：Podfile文件 中 platform:ios, ‘6.0’ 后边的 6.0 是平台版本号 ，一定要加上
如题，使用xcode9.3后新建工程，然后初始化pod init，结果报错：
报错信息
pod init
――― MARKDOWN TEMPLATE ――――――
### Command
```
/usr/local/bin/pod init
```
### Report
* What did you do?
* What did you expect to happen?
* What happened instead?
### Stack
```
CocoaPods : 1.3.1
Ruby : ruby 2.3.3p222 (2016-11-21 revision 56859) [universal.x86_64-darwin17]
RubyGems : 2.6.14
Host : Mac OS X 10.13.4 (17E202)
Xcode : 9.3 (9E145)
Git : git version 2.15.1 (Apple Git-101)
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.3/usr/lib
Repositories : master - https://github.com/CocoaPods/Specs.git @ 8e9a8f04aa2579345661be7afc6f6fafdfb09d51
PrivatePods - https://github.com/ModulizationDemo/PrivatePods.git @ 22ad9a433c6e02afeef4d32da95ba0fe64799a0d
```
### Plugins
```
cocoapods-deintegrate : 1.0.1
cocoapods-plugins : 1.0.0
cocoapods-search : 1.0.0
cocoapods-stats : 1.0.0
cocoapods-trunk : 1.3.0
cocoapods-try : 1.1.0
```
### Error
```
RuntimeError - [Xcodeproj] Unknown object version.
/Library/Ruby/Gems/2.3.0/gems/xcodeproj-1.5.3/lib/xcodeproj/project.rb:217:in `initialize_from_file'
/Library/Ruby/Gems/2.3.0/gems/xcodeproj-1.5.3/lib/xcodeproj/project.rb:102:in `open'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.3.1/lib/cocoapods/command/init.rb:41:in `validate!'
/Library/Ruby/Gems/2.3.0/gems/claide-1.0.2/lib/claide/command.rb:333:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.3.1/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.3.0/gems/cocoapods-1.3.1/bin/pod:55:in `'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `'
```
――― TEMPLATE END ―――
'''
[!] Oh no, an error occurred.
Search for existing GitHub issues similar to yours:
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https://github.com/CocoaPods/CocoaPods/issues/new
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