我正在使用钩子来更新状态。在我的代码中，我有一个 AppState 事件监听器，每当它触发时，我都会使用setAppState更新appState，但是事件监听器内的 appState 没有改变。但该值正在侦听器外部更新。谁能解释为什么会有这样的行为？
这是我的代码：
import React, { FunctionComponent, useEffect, useState } from "react"
import { View, AppState, AppStateStatus } from "react-native"
const Test: FunctionComponent<any> = (props: any) => {
const [appState, setAppState] = useState < AppStateStatus > (AppState.currentState)
useEffect(() => {
AppState.addEventListener("change", _handleAppStateChange)
},[])
const _handleAppStateChange = (nextAppState: AppStateStatus) => {
//appState not Changing here
console.log(appState, "app state")
if (appState.match(/inactive|background/) && nextAppState === "active") {
console.log("App has come to the foreground!")
activateRealtime()
} else if …