在苹果发布Swift语言之后，ReactiveCocoa使用Swift进行了重写。该框架创建了一个桥用来连接Swift和Objective-CAPI(ReactiveSwift和ReactiveObjC)。
示例代码：
extesio ActioProtocol where Iput: AyObject, Output: AyObject { fuc toRACCommad() -> RACCommad<Iput, Output>}extesio ActioProtocol where Iput: OptioalProtocol, Iput.Wrapped: AyObject, Output: AyObject { fuc toRACCommad() -> RACCommad<Iput.Wrapped, Output>}extesio ActioProtocol where Iput: AyObject, Output: OptioalProtocol, Output.Wrapped: AyObject { fuc toRACCommad() -> RACCommad<Iput, Output.Wrapped>}extesio ActioProtocol where Iput: OptioalProtocol, Iput.Wrapped: AyObject, Output: OptioalProtocol, Output.Wrapped: AyObject { fuc toRACCommad() -> RACCommad<Iput.Wrapped, Output.Wrapped>}
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