Comments (1)
如果你想严格地控制
Timer
的执行次数,请使用使用useRef
+clearInterval
,并且在useEffect
中的return => {}
里调用
import { useEffect, useRef, useState } from 'react'
type CountDown = (second: number) => [number, (seconds: number) => void]
export const useCountDown: CountDown = second => {
const [seconds, setSeconds] = useState(second)
const timer = useRef<number>()
useEffect(() => {
if (seconds > 0) {
timer.current = window.setTimeout(() => {
console.log('update')
setSeconds(seconds - 1)
}, 1000)
}
return () => window.clearInterval(timer.current)
}, [seconds])
return [seconds, setSeconds]
}
from code-more.
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