某一天零时相对于参考时间的 TimeInterval

Swift 代码

    /// 某一天零点时刻的 timeInterval
    ///
    /// - Parameter date: 某个日期
    /// - Returns: timeInterval
    private func someDayZeroClockTimeInterval(date: Date) -> TimeInterval {
        let calendar = Calendar.current
        var compoents = calendar.dateComponents([.year, .month, .day], from: Date.init())
        
        let date = calendar.date(from: compoents)!
        let interval = date.timeIntervalSinceReferenceDate
        return interval
        
    }