Need Swift version

[lijing89]

install_plugin does not specify a Swift version and none of the targets (Runner) integrating it have the SWIFT_VERSION attribute set. Please contact the author or set the SWIFT_VERSION attribute in at least one of the targets that integrate this pod

[lijing89]

• install_plugin does not specify a Swift version and none of the targets (Runner) integrating it have the SWIFT_VERSION attribute set. Please contact the author or set the SWIFT_VERSION attribute in at least one of the targets that integrate this pod.

  /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/cocoapods-1.7.4/lib/cocoapods/installer/xcode/target_validator.rb:122:in verify_swift_pods_swift_version' /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/cocoapods-1.7.4/lib/cocoapods/installer/xcode/target_validator.rb:37:invalidate!' /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/cocoapods-1.7.4/lib/cocoapods/installer.rb:578:in validate_targets' /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/cocoapods-1.7.4/lib/cocoapods/installer.rb:158:ininstall!' /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/cocoapods-1.7.4/lib/cocoapods/command/install.rb:51:in run' /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/claide-1.0.2/lib/claide/command.rb:334:inrun' /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/cocoapods-1.7.4/lib/cocoapods/command.rb:52:in run' /Users/lijing/.rvm/rubies/ruby-2.6.3/lib/ruby/gems/2.6.0/gems/cocoapods-1.7.4/bin/pod:55:in<top (required)>' /usr/local/bin/pod:23:in load' /usr/local/bin/pod:23:in

  ' /Users/lijing/.rvm/rubies/ruby-2.6.3/bin/ruby_executable_hooks:24:in eval' /Users/lijing/.rvm/rubies/ruby-2.6.3/bin/ruby_executable_hooks:24:in

  '

Error output from CocoaPods: ↳

[!] Automatically assigning platform `ios` with version `8.0` on target `Runner` because no platform was specified. Please specify a platform for this target in your Podfile. See `https://guides.cocoapods.org/syntax/podfile.html#platform`.

Error running pod install

[lijing89]

原因是OC项目没有桥接swift,参考:http://www.freesion.com/article/3401520/#_200