can't find gem cocoapods (>= 0.a) with executable pod (Gem::GemNotFoundException)

Traceback (most recent call last):

2: from /usr/local/bin/pod:23:in `<main>'

1: from /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems.rb:302:in `activate_bin_path'

/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/rubygems.rb:283:in `find_spec_for_exe': can't find gem cocoapods (>= 0.a) with executable pod (Gem::GemNotFoundException)

 

 

pod install 失败  ，报这个错，试过了

解决步骤：
1、sudo gem update --system
2、gem install cocoapods

没成功，然后使用

1.rvm get stable  

2.gem install cocoapods  

成功了，遇到这种问题的可以尝试