快速约会 - 每日至每周

Question

请帮助Swift 3中的日期。我尝试做的是： 1.获取Date数组中的第一个元素;如果不是星期一，则将此日期设置为星期一;获得下周一的日期。 2.制作一个循环：当下一个元素与当前周相关时......（执行smth）

    func d2w(daily: [Date], data: [Double]) -> ([Date], [Double]) {
        var weekly = [Date]()
        var wdata = [Double]()

        var calendar = Calendar.current
        var wday = calendar.component(.weekday, from: daily[0]) - calendar.firstWeekday
        //if wday != 1 { ... }
        //any other solution with Sunday is the first day of week?

        //while daily == *current week { wdata += data }
        //weekly.append()
        return (weekly, wdata)
    }