Question

为了找到当周的开始和结束，我设法做到了：

<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.12.4/jquery.min.js"></script>
<script src="http://maxcdn.bootstrapcdn.com/bootstrap/3.3.6/js/bootstrap.min.js"></script>

如何更新此代码以获取上周的开始/结束？

Answer 1

// Getting first day of the previous week 
func getPreviousWeekStartDay() -> Date? {
    let gregorian = Calendar(identifier: .gregorian)
    let sunday = gregorian.date(from: 
    gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self))
    return gregorian.date(byAdding: .day, value: -7, to: sunday!)!
}

// Getting last day of previous week 
func getPreviousWeekEndDay() -> Date? {        
    let gregorian = Calendar(identifier: .gregorian)
    let sunday = gregorian.date(from: gregorian.dateComponents([.yearForWeekOfYear, .weekOfYear], from: self))
    return gregorian.date(byAdding: .day, value: -1, to: sunday!)!
}

Answer 2

您可以从一周前开始计算：

let weekInSeconds: Double = 60 * 60 * 24 * 7
calendar.rangeOfUnit(.WeekOfMonth, startDate: &startOfWeek, interval: &interval, forDate: NSDate(timeIntervalSinceNow: -weekInSeconds))

现在，您可以使用weekInSeconds的倍数（未来几周为正，过去几周为负，本周为0）控制您希望在过去的哪一周（从现在开始）查看。

如何找出上周的开始和结束日

2 个答案: