I’m using Ionic 3 to countdown timer with hour, minute, and second…
This is my code:
timer.ts:
/* Initialize and setup the time for question */
ngOnInit() {
this.initTimer();
}
initTimer() {
// Pomodoro is usually for 25 minutes
if (!this.timeInSeconds) {
this.timeInSeconds = 1500;
}
this.time = this.timeInSeconds;
this.runTimer = false;
this.hasStarted = false;
this.hasFinished = false;
this.remainingTime = this.timeInSeconds;
this.displayTime = this.getSecondsAsDigitalClock(this.remainingTime);
}
startTimer() {
this.runTimer = true;
this.hasStarted = true;
this.timerTick();
}
pauseTimer() {
this.runTimer = false;
}
resumeTimer() {
this.startTimer();
}
timerTick() {
setTimeout(() => {
if (!this.runTimer) { return; }
this.remainingTime--;
this.displayTime = this.getSecondsAsDigitalClock(this.remainingTime);
if (this.remainingTime > 0) {
this.timerTick();
}
else {
this.hasFinished = true;
}
}, 1000);
}
getSecondsAsDigitalClock(inputSeconds: number) {
var sec_num = parseInt(inputSeconds.toString(), 10); // don't forget the second param
var hours = Math.floor(sec_num / 3600);
var minutes = Math.floor((sec_num - (hours * 3600)) / 60);
var seconds = sec_num - (hours * 3600) - (minutes * 60);
var hoursString = '';
var minutesString = '';
var secondsString = '';
hoursString = (hours < 10) ? "0" + hours : hours.toString();
minutesString = (minutes < 10) ? "0" + minutes : minutes.toString();
secondsString = (seconds < 10) ? "0" + seconds : seconds.toString();
return hoursString + ':' + minutesString + ':' + secondsString;
}
HTML:
<ion-item>
<h1 text-center>{{displayTime}}</h1>
</ion-item>
I don’t want to use button ‘Play’ and ‘Resume’, and I wished when load screen, the timer will auto countdown time…
How to auto start to countdown timer ?