我正在进行一个项目，该项目需要firebase和一些其他可可荚，我可以安装firebase，但无法安装一些其他荚。每次我试图安装pod时，它都会在下面抛出错误，两天前没有问题。。
xcode select：error：工具"xcodebuild"需要xcode，但活动的开发人员目录"/Library/developer/CommandLineTools"是命令行工具实例
命令
/usr/local/bin/pod install
堆栈
CocoaPods : 1.9.3
Ruby : ruby 2.6.3p62 (2019-04-16 revision 67580) [universal.x86_64-darwin19]
RubyGems : 3.0.3
Host : Mac OS X 10.15.1 (19B88)
Xcode : ()
Git : git version 2.19.0
Ruby lib dir : /System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib
Repositories : master - git - https://github.com/CocoaPods/Specs.git @ 241fe3335bd01f8cc484053cf0a694498679863a
trunk - CDN - https://cdn.cocoapods.org/
插件
cocoapods-deintegrate : 1.0.4
cocoapods-plugins : 1.0.0
cocoapods-search : 1.0.0
cocoapods-stats : 1.1.0
cocoapods-trunk : 1.5.0
cocoapods-try : 1.2.0
Podfile
# Uncomment the next line to define a global platform for your project
# platform :ios, '9.0'
target 'Blab' do
use_frameworks!
# Pods for Blab
# Firebase
pod 'Firebase/Core'
pod 'Firebase/Auth'
pod 'Firebase/Database'
# Pods
pod 'MessageKit'
pod 'JGProgressHUD'
pod 'RealmSwift'
pod 'SDWebImage'
end
错误
JSON::ParserError - 416: unexpected token at '"S'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/json/common.rb:156:in `parse'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/json/common.rb:156:in `parse'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.9.3/lib/cocoapods-core/specification/json.rb:61:in `from_json'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.9.3/lib/cocoapods-core/specification.rb:742:in `from_string'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.9.3/lib/cocoapods-core/specification.rb:716:in `from_file'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-core-1.9.3/lib/cocoapods-core/source.rb:186:in `specification'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/resolver/lazy_specification.rb:37:in `specification'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/delegate.rb:348:in `block in delegating_block'
/System/Library/Frameworks/Ruby.framework/Versions/2.6/usr/lib/ruby/2.6.0/delegate.rb:349:in `block in delegating_block'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/resolver.rb:178:in `dependencies_for'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:18:in `block in dependencies_for'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:70:in `with_no_such_dependency_error_handling'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/delegates/specification_provider.rb:17:in `dependencies_for'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:807:in `block in group_possibilities'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:806:in `reverse_each'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:806:in `group_possibilities'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:778:in `possibilities_for_requirement'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:761:in `push_state_for_requirements'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:746:in `require_nested_dependencies_for'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:729:in `activate_new_spec'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:686:in `attempt_to_activate'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:254:in `process_topmost_state'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolution.rb:182:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/molinillo-0.6.6/lib/molinillo/resolver.rb:43:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/resolver.rb:94:in `resolve'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1065:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:1063:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer/analyzer.rb:124:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:410:in `analyze'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:235:in `block in resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/user_interface.rb:64:in `section'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:234:in `resolve_dependencies'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/installer.rb:156:in `install!'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command/install.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/claide-1.0.3/lib/claide/command.rb:334:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/lib/cocoapods/command.rb:52:in `run'
/Library/Ruby/Gems/2.6.0/gems/cocoapods-1.9.3/bin/pod:55:in `<top (required)>'
/usr/local/bin/pod:23:in `load'
/usr/local/bin/pod:23:in `<main>'
[！]哦，不，发生了错误。
[！]由于未指定平台，因此在目标Blab上自动为平台iOS分配版本为13.0。请在您的Podfile中为此目标指定一个平台。参见https://guides.cocoapods.org/syntax/podfile.html#platform。
我试图取消对下列行的注释。。
平台：ios，'9.0'
但无法弄清楚问题出在哪里！如果有人能告诉我问题出在哪里，那就太好了。
尝试以下步骤：
rm -rf ~/.cocoapods/repos/trunk/
#Uncomment the platform part in Podfile
pod repo update --verbos
pod install
我想它的工作得很好
sudo arch -x86_64 gem install ffi
arch -x86_64 pod install