安装cocoapods

这个装cocoapods 遇到了好多问题，折腾了几天总算装好了，下面说下步骤，省的其他小伙伴踩坑。

1.首先设置ruby源

gem sources -l #查看当前ruby源

gem sources --remove https://rubygems.org/ #移除当前ruby源

gem sources -a https://gems.ruby-china.org/ #设置当前ruby源

2.更新gem

sudo gem update --system

3.安装cocoapods

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

下一步执行 pod setup，然后坑就来了，试了好多次都失败

报错如下：

[!] /usr/bin/git clonehttps://github.com/CocoaPods/Specs.git master

Cloning into 'master'...

error: RPC failed; curl 56 SSLRead() return error -36

fatal: The remote end hung up unexpectedly

fatal: early EOF

fatal: index-pack failed

试了各种方式也解决不了，包括直接下载Cocoapods包放到～／.cocoapods/repos/ 下并命名为master

但是这个方法给了我启发，下载包放到那里后，使用pod search AFNetworking能搜到东西了，但是在项目里使用pod install 还是会出错

错误如下：

[!] Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `master-1`.

You can try adding it manually in `~/.cocoapods/repos` or via `pod repo add`.

然后我就纳闷了，~/.cocoapods/repos 目录下不是有一个master了吗？为什么还要添加一个 master-1 ？ 然后我想肯定是下载的那个包有问题，原因是下载的包里没有git文件！

然后我就想明白了！于是直接到~/.cocoapods/repos 目录下执行 

git clone https://github.com/CocoaPods/Specs.git  然后就等吧，这时要网好，等下载完成后，把下载下的文件夹的名字改为master

然后在项目里就能使用pod install 安装想要的包了

结果运行 pod install  的时候又出问题了，崩溃啊

Address$ pod install

From https://github.com/CocoaPods/Specs

a4f097d..43b2172master-> origin/master

error: Your local changes to the following files would be overwritten by merge:

Specs/5/f/3/TypeWriting/0.0.1/TypeWriting.podspec.json

Specs/6/6/2/EmptyKit/3.0.0/EmptyKit.podspec.json

Specs/f/0/4/TangramKit/1.0.0/TangramKit.podspec.json

Please commit your changes or stash them before you merge.

Aborting

Updating a4f097d..43b2172

[!] Unable to add a source with url `https://github.com/CocoaPods/Specs.git` named `master-1`.

You can try adding it manually in `~/.cocoapods/repos` or via `pod repo add`.

就是说有几个文件改动了，pod install 会拉取cocoapods的更新，然后本地的会被覆盖，所以执行不了

到这就简单了，到 ~/.cocoapods/repos/master下执行 git reset HEAD --hard 

然后再到项目目录下运行pod install 就没问题了！