是否可以格式化dateComponent以显示为hh：mm：ss？

Question

我正在尝试以hh：mm：ss格式显示倒计时，但由于我没有输出Date而是dateComponents，所以我不能使用formatter.dateFormat。是否有可能格式化dateComponents？

目前我得到的输出如下：

小时：5，分钟：12，秒：45

func nextEventCalculator() -> DateComponents {
    let now = Date()
    let calendar = Calendar.current
    let components = DateComponents(calendar: calendar, hour: 12, minute: 15)  // <- 12:15 pm
    let nextEvent = calendar.nextDate(after: now, matching: components, matchingPolicy: .nextTime)!

    let diff = calendar.dateComponents([.hour, .minute, .second], from: now, to: nextEvent)
    dateCountdownLabel.text = "\(diff)"
    return diff
}

Answer 1

将DateComponentsFormatter与.positional let formatter = DateComponentsFormatter() formatter.unitsStyle = .positional dateCountdownLabel.text = formatter.string(from: diff) ：

一起使用

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