iOS pod install报错

Traceback (most recent call last):
    10: from /usr/local/bin/pod:23:in `<main>'
     9: from /usr/local/bin/pod:23:in `load'
     8: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
     7: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
     6: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
     5: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command/install.rb:46:in `run'
     4: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:160:in `verify_podfile_exists!'
     3: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/config.rb:205:in `podfile'
     2: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/podfile.rb:293:in `from_file'
     1: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/podfile.rb:319:in `from_ruby'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/podfile.rb:319:in `tr!': invalid byte sequence in UTF-8 (ArgumentError)
    10: from /usr/local/bin/pod:23:in `<main>'
     9: from /usr/local/bin/pod:23:in `load'
     8: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
     7: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
     6: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:324:in `run'
     5: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:337:in `rescue in run'
     4: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:396:in `handle_exception'
     3: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:66:in `report_error'
     2: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:30:in `report'
     1: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:111:in `markdown_podfile'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:111:in `strip': invalid byte sequence in UTF-8 (ArgumentError)
NvrdeiMac:SDLG-LinEHome-ios nvr-dev$ pod install
Traceback (most recent call last):
    10: from /usr/local/bin/pod:23:in `<main>'
     9: from /usr/local/bin/pod:23:in `load'
     8: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
     7: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
     6: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
     5: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command/install.rb:46:in `run'
     4: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:160:in `verify_podfile_exists!'
     3: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/config.rb:205:in `podfile'
     2: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/podfile.rb:293:in `from_file'
     1: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/podfile.rb:319:in `from_ruby'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.11.3/lib/cocoapods-core/podfile.rb:319:in `tr!': invalid byte sequence in UTF-8 (ArgumentError)
    10: from /usr/local/bin/pod:23:in `<main>'
     9: from /usr/local/bin/pod:23:in `load'
     8: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/bin/pod:55:in `<top (required)>'
     7: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:52:in `run'
     6: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:324:in `run'
     5: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:337:in `rescue in run'
     4: from /Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:396:in `handle_exception'
     3: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/command.rb:66:in `report_error'
     2: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:30:in `report'
     1: from /Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:111:in `markdown_podfile'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.11.3/lib/cocoapods/user_interface/error_report.rb:111:in `strip': invalid byte sequence in UTF-8 (ArgumentError)

报错时，用xcode 打开项目，重新打开podfile文件，然后编译后，成功pod install