emitter-kit:Swift的类型安全事件处理

发射器套件v5.2.2 类型安全且不冗长的NSNotificationCenter#addObserver和NSObject#addObserver替代品。 import EmitterKit // A generic event emitter (but type-safe)! var event = Event < T> () // Any emitted data must be the correct type. event. emit (data) // This listener will only be called once. // You are *not* required to retain it. event. once { data : T in print (data) } // This listener won't stop listening;