我必须将倒计时设定为每个月的15号。我能够成功获得倒数到15日所需的差值。
计算差异后,我计算天数,小时数,分数,秒数。
除了days之外的其他所有内容都返回值0
export default React.createClass({
tick: function() {
var currentDate = new Date();
var date_till_15 = new Date();
if (currentDate.getDate() < 15) {
var days_till_15 = 15 - currentDate.getDate();
date_till_15 = new Date(date_till_15.setDate(currentDate.getDate() + days_till_15 ));
} else if(currentDate.getDate() > 15){
date_till_15 = new Date(date_till_15.setMonth(currentDate.getMonth() + 1));
date_till_15 = new Date(date_till_15.setDate(15));
}
var difference = date_till_15 - currentDate;
var daysLeft = 0, hoursLeft = 0, minutesLeft = 0, secondsLeft = 0;
if (difference > 0) {
daysLeft = Math.floor( difference / (1000*60*60*24) );
difference -= daysLeft * (1000*60*60*24);
hoursLeft = Math.floor( difference / (1000*60*60) );
difference -= hoursLeft * (1000*60*60);
minutesLeft = Math.floor( difference / (1000*60) );
difference -= minutesLeft * (1000*60);
secondsLeft = Math.floor( difference/1000 );
this.setState({
days: daysLeft,
hours: hoursLeft,
minutes: minutesLeft,
seconds: secondsLeft
});
} else {
clearInterval( this.timeInterval );
this.setState({ expired: true });
}
},
componentDidMount: function(){
this.timeInterval = setInterval( this.tick.bind(this), 1000);
},
render() {
return (
<div>
{this.state &&
<div>
<div>{this.state.days}</div>
<div>{this.state.minutes}</div>
</div>
}
</div>
)
}
});
答案 0 :(得分:0)
试试这个:
console.log(getTimeToNext(15));
function getTimeToNext(dayOfMonth) {
var currentDate = new Date();
var target;
if (currentDate.getDate() < dayOfMonth) {
target = new Date(
currentDate.getFullYear(),
currentDate.getMonth(),
dayOfMonth, 0, 0, 0, 0);
} else {
var currentMonth = currentDate.getMonth();
if (currentMonth === 11) {
target = new Date(
currentDate.getFullYear() + 1,
0,
dayOfMonth, 0, 0, 0, 0);
} else {
target = new Date(
currentDate.getFullYear(),
currentMonth + 1,
dayOfMonth, 0, 0, 0, 0);
}
}
var delta = target - currentDate;
var daysLeft = Math.floor(delta/(1000*60*60*24));
delta -= daysLeft * (1000*60*60*24);
var hoursLeft = Math.floor(delta/(1000*60*60));
delta -= hoursLeft * (1000*60*60);
var minutesLeft = Math.floor(delta/(1000*60));
delta -= minutesLeft * (1000*60);
var secondsLeft = Math.floor(delta/(1000));
return {
days: daysLeft,
hours: hoursLeft,
minutes: minutesLeft,
seconds: secondsLeft};
}