如何将setInterval
计时器重置为0?
var myTimer = setInterval(function() {
console.log('idle');
}, 4000);
我试过了,clearInterval(myTimer)
但这完全停止了间隔。我希望它从0重新启动。
Answers:
如果通过“重新启动”表示此时要开始一个新的4秒间隔,则必须停止并重新启动计时器。
function myFn() {console.log('idle');}
var myTimer = setInterval(myFn, 4000);
// Then, later at some future time,
// to restart a new 4 second interval starting at this exact moment in time
clearInterval(myTimer);
myTimer = setInterval(myFn, 4000);
您还可以使用一个带有重置功能的小计时器对象:
function Timer(fn, t) {
var timerObj = setInterval(fn, t);
this.stop = function() {
if (timerObj) {
clearInterval(timerObj);
timerObj = null;
}
return this;
}
// start timer using current settings (if it's not already running)
this.start = function() {
if (!timerObj) {
this.stop();
timerObj = setInterval(fn, t);
}
return this;
}
// start with new or original interval, stop current interval
this.reset = function(newT = t) {
t = newT;
return this.stop().start();
}
}
用法:
var timer = new Timer(function() {
// your function here
}, 5000);
// switch interval to 10 seconds
timer.reset(10000);
// stop the timer
timer.stop();
// start the timer
timer.start();
一旦清除间隔,clearInterval
您就可以setInterval
再次使用。为了避免重复执行回调,请将其外部化为一个单独的函数:
var ticker = function() {
console.log('idle');
};
然后:
var myTimer = window.setInterval(ticker, 4000);
然后当您决定重新启动时:
window.clearInterval(myTimer);
myTimer = window.setInterval(ticker, 4000);
setInterval(myTimer, 4000)
,应该是setInterval(ticker, 4000);
。