我正在尝试创建一个函数来计算Spotify中歌曲的时间进度,但是我仍然停留在clearInterval函数上。问题是计时器在我尝试将其重置后仍保持加速。我正在使用Reactjs
第一次运行intervalToTick是1.6秒,但是如果我再次运行该函数,它的速度将提高一倍,并且每次重置(首次工作)的速度都会越来越快
我的解决方案是因为我使用mobX是将myTimer
添加为商店中的@observable,然后继续下面的答案
const ticker = function() {
if (store.timer < 100) {
store.addToTimer() //mobX store action to add 1+ to the store.timer
}
};
function progress() {
store.timer = 0
let time = Moment()
let songEnd = Moment().add(1, "minutes")
const durationToFinnish = Moment.duration(songEnd.diff(time));
const intervalToTick = 100000 / durationToFinnish.asMilliseconds()
//Dumb to have it 2 times but cant figure of another way
var myTimer = window.setInterval(ticker, intervalToTick * 1000);
clearInterval(myTimer);
myTimer = window.setInterval(ticker, intervalToTick * 1000);
}
<div className={classes.progressBar} id="progress">
<div className={classes.innerProgressBar}>
<span onClick={progress}>{store.timer}%</span><br></br>
</div>
</div>
答案 0 :(得分:3)
您应该使timer变量具有更大的作用域,以便可以从progress
和ticker
对其进行访问,并且如果已有一个正在运行,则需要清除该间隔,以免多个间隔同时运行:
var myTimer = null; // Declared here so it can be used in both functions
const ticker = function () {
if(store.timer < 100){
store.addToTimer() //mobX store action to add 1+ to the store.timer
}
};
function progress() {
store.timer = 0
let time = Moment()
let songEnd = Moment().add(1, "minutes")
const durationToFinnish = Moment.duration(songEnd.diff(time));
const intervalToTick = 100000 / durationToFinnish.asMilliseconds()
// Check to see if there is already a timer running
if(myTimer){
clearInterval(myTimer); // Stop the interval
}
myTimer = setInterval(ticker, intervalToTick * 1000);
}
<div className={classes.progressBar} id="progress">
<div className={classes.innerProgressBar}>
<span onClick={progress}>{store.timer}%</span><br></br>
</div>
</div>