Kotlin 事件处理的最佳实践包括以下几点:
equals()
、hashCode()
和 toString()
方法,方便事件对象的比较和日志记录。data class MyEvent(val message: String)
class EventPublisher {
private val subscribers = mutableListOf<EventHandler<MyEvent>>()
fun subscribe(handler: EventHandler<MyEvent>) {
subscribers.add(handler)
}
fun unsubscribe(handler: EventHandler<MyEvent>) {
subscribers.remove(handler)
}
fun publish(event: MyEvent) {
subscribers.forEach { it.handle(event) }
}
}
class MyEventHandler : EventHandler<MyEvent> {
override fun handle(event: MyEvent) {
// 处理 MyEvent 类型的逻辑
}
}
fun MyEvent.logEvent() {
println("Event: $message")
}
fun EventHandler<MyEvent>.logHandler() {
handle = { event ->
event.logEvent()
handle(event)
}
}
fun EventHandler<MyEvent>.handle(event: MyEvent?) {
event?.let {
// 处理非空事件
} ?: run {
// 处理空事件
}
}
fun EventHandler<MyEvent>.handle(event: MyEvent) {
val (message) = event
// 处理事件
}
forEach
遍历订阅者列表:在发布事件时,使用 forEach
遍历订阅者列表,确保每个订阅者都收到事件通知。fun EventPublisher.publish(event: MyEvent) {
subscribers.forEach { it.handle(event) }
}
遵循以上最佳实践,可以提高 Kotlin 事件处理的代码质量和可维护性。