ERROR: Could not find a valid gem 'cocoapods' (= 1.5.2), here is why: Unable to download

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今天遇到一个问题

ERROR:  Could not find a valid gem 'cocoapods' (>= 0), here is why:
          Unable to download data from https://gems.ruby-china.org/ - bad response Not Found 404 (https://gems.ruby-china.org/specs.4.8.gz)

后来找到原因

解决办法:

1查看当前源

➜  ~ gem source -l

*** CURRENT SOURCES ***

https://gems.ruby-china.org/

2删除当前源

 ~ gem sources --remove https://gems.ruby-china.org/
https://gems.ruby-china.org/ removed from sources

3添加新的源,就可以就可以更新了

gem sources --add https://gems.ruby-china.com/
https://gems.ruby-china.com/ added to sources
➜  ~ gem source -l                                 
*** CURRENT SOURCES ***

https://gems.ruby-china.com/
➜  ~ sudo gem install cocoapods  
Password:
Fetching: cocoapods-core-1.5.3.gem (100%)
Successfully installed cocoapods-core-1.5.3
Fetching: cocoapods-1.5.3.gem (100%)
Successfully installed cocoapods-1.5.3
Parsing documentation for cocoapods-core-1.5.3
Installing ri documentation for cocoapods-core-1.5.3
Parsing documentation for cocoapods-1.5.3
Installing ri documentation for cocoapods-1.5.3
Done installing documentation for cocoapods-core, cocoapods after 4 seconds
2 gems installed