cocoaPod pod install 出现错误

在项目xcworkspace中新增一个project，Podfile写好新分支的target

target 'heNanXinXiang' do
    platform :ios, '8.0'
    project 'heNanXinXiang/heNanXinXiang.xcodeproj'
    pod 'MJRefresh'
    pod 'MBProgressHUD'
    pod 'SDWebImage'
    pod 'FMDB'
    pod 'TYKYLibrary'
    pod 'Bugly'
     pod 'UMCShare/Social/ReducedWeChat'
    pod 'JPush'
    
end

项目也设置好支持最低版本支持

Deployment Info.png

但是运行的时候会出现以下的错误，为了详细。。。 这里全部列出来

### Command


/Users/tjsoft/.rvm/rubies/ruby-2.2.0/bin/pod install


### Report

* What did you do?

* What did you expect to happen?

* What happened instead?


### Stack


   CocoaPods : 1.3.1
        Ruby : ruby 2.2.0p0 (2014-12-25 revision 49005) [x86_64-darwin14]
    RubyGems : 2.6.7
        Host : Mac OS X 10.13.5 (17F77)
       Xcode : 9.4.1 (9F2000)
         Git : git version 2.15.2 (Apple Git-101.1)
Ruby lib dir : /Users/tjsoft/.rvm/rubies/ruby-2.2.0/lib
Repositories : master - https://github.com/CocoaPods/Specs.git @ bb1ecc39b9f60055d2b89572fe141aec6a3b5476


### Plugins


cocoapods-deintegrate : 1.0.1
cocoapods-plugins     : 1.0.0
cocoapods-search      : 1.0.0
cocoapods-stats       : 1.0.0
cocoapods-trunk       : 1.2.0
cocoapods-try         : 1.1.0


### Podfile

```ruby
workspace 'TYKYOnlineWall_iOS.xcworkspace'

target 'TYKYWallBaseSDK' do
    platform :ios, '8.0'
    project 'TYKYWallBaseSDK/TYKYWallBaseSDK.xcodeproj'
    pod 'MJRefresh'
    pod 'MBProgressHUD'
    pod 'SDWebImage'
    pod 'FMDB'
    pod 'TYKYLibrary'
    pod 'Bugly'
     pod 'UMCShare/Social/ReducedWeChat'
#    pod 'UMengAnalytics-NO-IDFA'
    pod 'JPush'
    
end


target 'kaiFengZiMaoQu2.0' do
    platform :ios, '8.0'
    project 'kaiFengZiMaoQu2.0/kaiFengZiMaoQu2.0.xcodeproj'
    pod 'MJRefresh'
    pod 'MBProgressHUD'
    pod 'SDWebImage'
    pod 'FMDB'
    pod 'TYKYLibrary','1.4.5'
    pod 'Bugly'
    pod 'ZFPlayer'
     pod 'UMCShare/Social/ReducedWeChat'
    #    pod 'UMengAnalytics-NO-IDFA'
    pod 'JPush'
    
end

target 'nanYang' do
    platform :ios, '8.0'
    project 'nanYang/nanYang.xcodeproj'
    pod 'MJRefresh'
    pod 'MBProgressHUD'
    pod 'SDWebImage'
    pod 'FMDB'
    pod 'TYKYLibrary','1.4.5'
    pod 'Bugly'
    pod 'UMCShare/Social/ReducedWeChat'
    pod 'JPush'
    
end


target 'huNanLiuYangJingKai' do
    platform :ios, '8.0'
    project 'huNanLiuYangJingKai/huNanLiuYangJingKai.xcodeproj'
    pod 'MJRefresh'
    pod 'MBProgressHUD'
    pod 'SDWebImage'
    pod 'FMDB'
    pod 'TYKYLibrary','1.4.5'
    pod 'Bugly'
    pod 'UMCShare/Social/ReducedWeChat'
    pod 'JPush'
    
end


### Error

RuntimeError - [Xcodeproj] Unknown object version.
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/xcodeproj-1.5.1/lib/xcodeproj/project.rb:217:in `initialize_from_file'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/xcodeproj-1.5.1/lib/xcodeproj/project.rb:102:in `open'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer/analyzer.rb:903:in `block (2 levels) in inspect_targets_to_integrate'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer/analyzer.rb:902:in `each'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer/analyzer.rb:902:in `block in inspect_targets_to_integrate'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/user_interface.rb:64:in `section'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer/analyzer.rb:897:in `inspect_targets_to_integrate'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer/analyzer.rb:69:in `analyze'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer.rb:242:in `analyze'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer.rb:154:in `block in resolve_dependencies'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/user_interface.rb:64:in `section'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer.rb:153:in `resolve_dependencies'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/installer.rb:116:in `install!'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/command/install.rb:41:in `run'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/claide-1.0.2/lib/claide/command.rb:334:in `run'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/lib/cocoapods/command.rb:52:in `run'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/gems/cocoapods-1.3.1/bin/pod:55:in `'
/Users/tjsoft/.rvm/rubies/ruby-2.2.0/bin/pod:22:in `load'
/Users/tjsoft/.rvm/rubies/ruby-2.2.0/bin/pod:22:in `
'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/bin/ruby_executable_hooks:15:in `eval'
/Users/tjsoft/.rvm/gems/ruby-2.2.0@global/bin/ruby_executable_hooks:15:in `
'


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[!] Oh no, an error occurred.

Search for existing GitHub issues similar to yours:
https://github.com/CocoaPods/CocoaPods/search?q=%5BXcodeproj%5D+Unknown+object+version.&type=Issues

If none exists, create a ticket, with the template displayed above, on:
https://github.com/CocoaPods/CocoaPods/issues/new

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Looking for related issues on cocoapods/cocoapods...
 - RuntimeError - [Xcodeproj] Unknown object version.
   https://github.com/CocoaPods/CocoaPods/issues/7697 [closed] [22 comments]
   5 days ago

 - Unknown object version
   https://github.com/CocoaPods/CocoaPods/issues/7760 [closed] [1 comment]
   5 weeks ago

 - RuntimeError - [Xcodeproj] Unknown object version. 
   https://github.com/CocoaPods/CocoaPods/issues/7712 [closed] [9 comments]
   07 May 2018

and 40 more at:
https://github.com/cocoapods/cocoapods/search?q=[Xcodeproj]%20Unknown%20object%20version.&type=Issues&utf8=✓

刚开始没有注意看，一看到错误就直接谷歌和百度，给出的方法，是升级cocoPod版本。

sudo rm -fr ~/.cocoapods/repos/master

pod setup

但是我这种情况还是不行。在仔细查看错误，其实cocoaPod最后有列出跟这个问题接近的issues，在https://github.com/CocoaPods/CocoaPods/issues/7697 这个issues中找到了解决方案。

Xcode9.3版本之后，创建新的project文件，这里会自动设置为Xcode 9.3 - compatible

Projece Format.jpg

将Projece Format 修改为 Xcode 8.0 - compatible 即可。

Projece Format 设置project的文件格式，当我们设置为Xcode 9.3 - compatible的时候，使用9.3以下版本Xcode是无法打开。应该是三方库的project文件低于9.3的时候，cocoaPod会出现错误（如果理解不到位，麻烦大佬指出）

问题记录下。