今天在一个新的项目中用cocoapods添加第三方的的时候， 提示RuntimeError - [Xcodeproj] Unknown object version.Cocoapods这样的错误。还有其他的提示
### Command
```
/Users/qqqq/.rvm/rubies/ruby-2.0.0-p643/bin/pod install
```
### Report
* What did you do?
* What did you expect to happen?
* What happened instead?
### Stack
```
CocoaPods : 1.2.0
Ruby : ruby 2.0.0p643 (2015-02-25 revision 49749) [x86_64-darwin14.5.0]
RubyGems : 2.6.6
Host : Mac OS X 10.13.4 (17E199)
Xcode : 9.3 (9E145)
Git : git version 2.15.1 (Apple Git-101)
Ruby lib dir : /Users/qqqq/.rvm/rubies/ruby-2.0.0-p643/lib
Repositories : master - https://github.com/CocoaPods/Specs.git @ d0a0ba10caedbe7cc887411b987a5d458c8e9209
```
### Plugins
```
cocoapods-deintegrate : 1.0.1
cocoapods-plugins : 1.0.0
cocoapods-search : 1.0.0
cocoapods-stats : 1.0.0
cocoapods-trunk : 1.1.2
cocoapods-try : 1.1.0
```
### Podfile
```ruby
platform :ios, '8.0'
use_frameworks!
target 'SilverMeter' do
end
```
还有
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Looking for related issues on cocoapods/cocoapods...
- RuntimeError - [Xcodeproj] Unknown object version. 🌈
https://github.com/CocoaPods/CocoaPods/issues/7712 [closed] [9 comments]
a week ago
还有很多的提示， 在此不在复制了，有很多的方式解决， 但是我是先执行 sudo gem install cocoapods 时提示 ERROR：While executing gem ... 有这样字段的错误， 然后执行 sudo gem install -n /usr/local/bin cocoapods 以后 就可以了。希望能给遇到相同错误的同行提供一些思路。
还有， 我这边有个思路不知道对不对， 如果在使用cocoapods时出现错误并且找不到解决办法的时候， 可以找 cocoapods详细安装 过程的，按照步骤介绍有选择的执行命令行， 可能会解决你的问题
