1.传入的值是一个秒的时间戳，要求当返回时间距离现在在24个小时之内，显示为多少小时或多少分钟之前，大于24个小时后直接显示年月日时分秒。

//timestamp.js
function timestamp(createdAt) {
    const date = new Date();
    const currentTimestamp = date.getTime(); //获取当前时间的时间戳
    const result = (currentTimestamp - createdAt * 1000) / (1000 * 60);//两个时间戳之间相隔的分钟数
    if (result > 24 * 60) {
        this.createTime = this.timestampChangeData(createdAt);
    } else if (result > 60 && result < 24 * 60) {
        this.createTime = Math.floor(result / 60) + '小时前';
    } else {
        this.createTime = Math.floor(result) + '分钟前';
    }
    return this.createTime;
}

// 时间戳转日期
timestampChangeData = (da) => {
    const times = new Date(da * 1000);
    const year = times.getFullYear();
    const month = times.getMonth() + 1;
    const day = times.getDate();
    const hour = times.getHours();
    const minutes = times.getMinutes();
    const seconds = times.getSeconds();
    return `${year}-${this.add0(month)}-${this.add0(day)} ${this.add0(hour)
    }:${this.add0(minutes)}:${this.add0(seconds)}`;
};

// 补0
add0 = number => number < 10 ? `0${number}` : number;

消息列表：

//messageItem.js
render() {
        const {data} = this.props;
        const createdAt = get(data, 'item.created_at');
        return (
          <Text>{timestamp(createdAt)}</Text>
        );
    }
}

2.传入的两个值分别是开始和结束的时间戳，要求实现
XXXX年XX月XX日 周X XX:XX:XX - XX:XX:XX (X小时)效果

import moment from 'moment';
render() {
    const time = this.timestampStringData(begin, end);  
    return(
            <Text>{time}</Text>
)
}
// 时间戳转日期
timestampStringData = (begin, end) => {
    const timesBegin = moment.unix(begin);
    const timesEnd = moment.unix(end);
    const week = timesBegin.day();
    const data = `${timesBegin.format(ext('orderDateFormat'))} ${this.changeWeek(week)}`;
    const time = `${timesBegin.format(ext('orderMinuteFormat'))} - ${timesEnd.format(ext('orderMinuteFormat'))}`;
    const hours = stringFormat(ext('resultHour'), (timesEnd.diff(timesBegin, 'minutes') * 1.0 / 60));
    return `${data} ${time} (${hours})`;
};

changeWeek = (week) => {
    let weekDay = '';
    const weekDayArray = [ext('sunday'), ext('monday'), ext('tuesday'), ext('wednesday'),
        ext('thursday'), ext('friday'), ext('saturday')];
    weekDay = weekDayArray[week];
    return weekDay;
}

// 时间戳计算相隔小时数
    getHours = (begin, end) => {
        const dateTime = (end - begin) * 1000;
        const leave = dateTime % (24 * 3600 * 1000);
        const hours = leave / (3600 * 1000);
        return hours;
    }

参考：
Js计算时间差（天、小时、分钟、秒)