cocopod依赖不同库swift版本不一样

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遇到swift版本不一致情况怎么办,操作如下,如AFNetworking,ReactiveSwift默认会根据Xcode10.1支持最高版本4.2,但是EmptyDataSet-Swift和PagingKit只支持4.0情况就可以像下面写。是要命令pod install才执行的,报错请把.lock文件删除

  pod 'AFNetworking'
  pod 'MBProgressHUD'
  pod 'IQKeyboardManager'
  pod 'EmptyDataSet-Swift'
  pod 'PagingKit'
  pod 'YYModel'
  pod 'ReactiveSwift'

  swift4 = ['EmptyDataSet-Swift', 'PagingKit']
  
  post_install do |installer|
      installer.pods_project.targets.each do |target|
          target.build_configurations.each do |config|
              if swift4.include?(target.name)
                  config.build_settings['SWIFT_VERSION'] = '4.0'
              end
          end
      end
  end