颤振本地通知 "The hour of the day, expressed as in a 24-hour clock [0..23]."

Question

我正在使用flutter本地通知，我想了解一下上面的时间。在 date_time.dart 中，这是一个用于 flutter 本地通知的代码文件，我发现：

"The hour of the day, expressed as in a 24-hour clock [0..23]."

这意味着我需要在早上 8 点创建一个通知，我应该输入代码 07。但是flutter local notification的例子，本来是上午10点的通知，但是他们在代码中写的是10.也就是说范围是[1..24]，不是吗？ 调度示例代码为：

  Future<void> _scheduleDailyTenAMNotification() async {
    await flutterLocalNotificationsPlugin.zonedSchedule(
        0,
        'daily scheduled notification title',
        'daily scheduled notification body',
        _nextInstanceOfTenAM(),
        const NotificationDetails(
          android: AndroidNotificationDetails(
              'daily notification channel id',
              'daily notification channel name',
              'daily notification description'),
        ),
        androidAllowWhileIdle: true,
        uiLocalNotificationDateInterpretation:
            UILocalNotificationDateInterpretation.absoluteTime,
        matchDateTimeComponents: DateTimeComponents.time);
  }

  tz.TZDateTime _nextInstanceOfTenAM() {
    final tz.TZDateTime now = tz.TZDateTime.now(tz.local);
    tz.TZDateTime scheduledDate =
        tz.TZDateTime(tz.local, now.year, now.month, now.day, 10);
    if (scheduledDate.isBefore(now)) {
      scheduledDate = scheduledDate.add(const Duration(days: 1));
    }
    return scheduledDate;
  }

Answer 1

这里通过在范围为 [0..23]

的参数上传递 10 来获取上午 10 点的下一个实例

  tz.TZDateTime _nextInstanceOfTenAM() {
    final tz.TZDateTime now = tz.TZDateTime.now(tz.local);
    tz.TZDateTime scheduledDate =
        tz.TZDateTime(tz.local, now.year, now.month, now.day, 10); //here 10 is for 10:00 AM
    if (scheduledDate.isBefore(now)) {
      scheduledDate = scheduledDate.add(const Duration(days: 1));
    }
    return scheduledDate;
  }

因为值对应于 24 小时格式。 0 代表 00:00。和 23 用于 23:00，即分别为 12:00 AM 和 11:00 PM。

因此，要在 8:00 AM 的下一个实例中设置，您需要传递 8。这意味着 8:00 在 24 小时和 8:00 AM 在 12 小时格式。

颤振本地通知 "The hour of the day, expressed as in a 24-hour clock [0..23]."

flutter local notification "The hour of the day, expressed as in a 24-hour clock [0..23]."

dart

flutter

flutter-local-notification