react－native 计算时间差

//计算时间

var sendTime = this.props.obj.send_time;

console.log(sendTime);

//当前时间

var nowTime = (new Date()).valueOf();

console.log(nowTime);

//差值

var date3 = nowTime - sendTime;

console.log(date3);

//天

var days=Math.floor(date3/(24*3600*1000))

//时

var leave1=date3%(24*3600*1000)

var hours=Math.floor(leave1/(3600*1000))

//分

var leave2=leave1%(3600*1000)

var minutes=Math.floor(leave2/(60*1000))

//秒

var leave3=leave2%(60*1000)

var seconds=Math.round(leave3/1000)

var disAndTimeText;

if(days>0){

var myText = '600m '+days+'天前'

disAndTimeText = <Text style={styles.disAndTimeText}>{myText}</Text>

}

if(days==0&&hours>0){

var myText = '600m '+hours+'小时前'

disAndTimeText = <Text style={styles.disAndTimeText}>{myText}</Text>

}

if(days==0&&hours==0&&minutes>0){

var myText = '600m '+minutes+'分钟前'

disAndTimeText = <Text style={styles.disAndTimeText}>{myText}</Text>

}

if(days==0&&hours==0&&minutes==0&&seconds>0){

var myText = '600m 刚刚'

disAndTimeText = <Text style={styles.disAndTimeText}>{myText}</Text>

}