重复任务，如何用代码实现
我正在开发任务管理器应用程序，并且想要添加重复/重复任务功能。我一直在思考如何让它发挥作用，但无法真正弄清楚其中的机制，以及重复任务如何在未来的某个时间范围内重新创建自己。
假设我将从下周开始每周一的 8:00 创建一个重复任务。现在假设我在接下来的 3 周内不使用该应用程序，那么当我打开该应用程序时，我是否应该看到过去 3 周的每一周有 3 个任务？或者只是下周一的新任务？如果我选择第一个选项，我什么时候需要创建这些任务，当用户打开应用程序或退出时？
如果有人能详细说明这一点，我会很好。
I'm working on a task manager app and want to add a recurring/repeating tasks feature. I have been thinking on how to get this working but can't really figure out the mechanics, how a recurring task recreate itself some time-frame in the future.
Suppose I would create a recurring task for every Monday at 8:00 starting from next week. Now suppose I don't use the app for the next 3 weeks, then when I open the app should I see 3 task for each of the last 3 weeks ? Or only a new task for the next Monday ? In case I would choose the first option, when do I need to create those task, when the user opens the app or when he exits ?
I would be great if some could elaborate on this.
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这完全取决于你。如果您使用您的应用程序，您会更喜欢哪个？就我个人而言，我更希望旧的任务无论如何都存在，但其他人可能会有不同的感觉。选择一个或在您的设置中为用户提供一个选项。
我认为正确的选择是在任务第一次可见时创建任务。例如，如果您有日历，请在第一次向用户显示该日/月/周时创建任务。这样您就可以只在需要时创建任务。
我必须强调一点，这实际上取决于您如何向用户呈现此信息。
This is entirely up to you. If you were using your app which would you prefer? Personally I would prefer that the old tasks are there regardless, but others might feel otherwise. Pick one or offer the user an option in your settings.
I think the right choice is to create the task when it becomes visible for the first time. For example, if you have a calendar, create the task the first time you display that day/month/week to the user. This way you are only creating tasks as they are needed.
I cannot stress enough though that it really depends on how you are presenting this information to the user.