Xcode 9中CocoaPods RxCocoa 3.6.1构建失败

Question

RxCocoa版本3.6.1无法在Xcode 9中构建，并显示错误消息：

Initializer 'init(parentObject:)' with Objective-C selector   'initWithParentObject:' conflicts with initializer 'init(parentObject:)' from superclass 'RxScrollViewDelegateProxy' with the same Objective-C selector      

Answer 1

这似乎是由@objc推断引起的。奇怪的是，关闭Swift 3风格的@objc推理似乎解决了这个问题。把它放在Podfile的末尾：

post_install do |installer|
  installer.pods_project.targets.each do |target|
    target.build_configurations.each do |config|
      config.build_settings['SWIFT_VERSION'] = '3.2'
      if target.name == 'RxCocoa' then
        config.build_settings['SWIFT_SWIFT3_OBJC_INFERENCE'] = 'Off'
      end
    end
  end
end

这将设置所有使用Swift 3.2构建的Pod，禁用RxCocoa的@objc推理。