ios - 创建时间间隔 Swift 列表

Question

您好，我无法创建从一个时间开始直到到达另一个时间的固定时间间隔列表。你能帮助我吗？ ( swift 2.0)

例子:

我有两次 (8:00 - 23:00)。我知道间隔的持续时间(30 分钟)。作用域是创建一个时间间隔数组(8:00-8:30、8:30 - 9:00 等)。我使用对象调用 Time(start:Int, end:Int)

谢谢

Answer 1

您可以创建一个这样的类来生成那样的间隔，

struct Time {

    let start: TimeInterval
    let end: TimeInterval
    let interval: TimeInterval

    init(start: TimeInterval, interval: TimeInterval, end: TimeInterval) {
        self.start = start
        self.interval = interval
        self.end = end
    }

    init(startHour: TimeInterval, intervalMinutes: TimeInterval, endHour: TimeInterval) {
        self.start = startHour * 60 * 60
        self.end = endHour * 60 * 60
        self.interval = intervalMinutes * 60
    }

    var timeRepresentations: [String] {
        let dateComponentFormatter = DateComponentsFormatter()
        dateComponentFormatter.unitsStyle = .positional
        dateComponentFormatter.allowedUnits = [.minute, .hour]

        var dateComponent = DateComponents()
        return timeIntervals.map { timeInterval in
            dateComponent.second = Int(timeInterval)
            return dateComponentFormatter.string(from: dateComponent)!
        }
    }

    var timeIntervals: [TimeInterval]{
        return Array(stride(from: start, through: end, by: interval))
    }
}

然后您可以生成时间表示数组，

let time = Time(startHour: 8, intervalMinutes: 30, endHour: 23)

print(time.timeRepresentations)

然后生成，

["8:00", "8:30", "9:00", "9:30", "10:00", "10:30", "11:00", "11:30", "12:00", "12:30", "13:00", "13:30", "14:00", "14:30", "15:00", "15:30", "16:00", "16:30", "17:00", "17:30", "18:00", "18:30", "19:00", "19:30", "20:00", "20:30", "21:00", "21:30", "22:00", "22:30", "23:00"]

要检索范围，请将此代码放在末尾

let time = Time(startHour: 9, intervalMinutes: 30, endHour: 17)

let ranges = time.timeRepresentations.enumerated().compactMap { index, value -> String? in
    if index + 1 < time.timeRepresentations.count {
        return value + " - " + time.timeRepresentations[index + 1]
    }
    return nil
}

print(ranges.joined(separator: "\n"))

结果是，

9:00 - 9:30
9:30 - 10:00
10:00 - 10:30
10:30 - 11:00
11:00 - 11:30
11:30 - 12:00
12:00 - 12:30
12:30 - 13:00
13:00 - 13:30
13:30 - 14:00
14:00 - 14:30
14:30 - 15:00
15:00 - 15:30
15:30 - 16:00
16:00 - 16:30
16:30 - 17:00