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NSDate来自周数(NSDate from week number)

我正在尝试使用Swift创建每周重复的本地通知。 通知将设置为每周的第一天和10:00。 当然我不想为过去的日期设置通知,因此我需要查看它是否已经过了第10周的第一天。 如果没有,我将在今天10:00创建通知,否则在下周一周一10:00创建通知。

我创建了一个扩展来计算当前日期的周数。

    extension NSDate {

        func weekOfYear() -> Int {
        let calendar = NSCalendar.currentCalendar()
        let components = calendar.components(NSCalendarUnit.WeekOfYear, fromDate: self)
        let weekOfYear = components.weekOfYear

        return weekOfYear
        }
    }

我不能再这样了。 任何帮助表示赞赏。 问候。


I am trying to create a weekly recurring local notification using Swift. Notification is going to be set to first day of every week, and in 10:00. Ofcourse I don't want to set a notification for a past date, so I need to see if now it has passed first day of week 10:00. If not, I will create notification for today 10:00, else next week monday 10:00.

I created an extension to calculate week number for current date.

    extension NSDate {

        func weekOfYear() -> Int {
        let calendar = NSCalendar.currentCalendar()
        let components = calendar.components(NSCalendarUnit.WeekOfYear, fromDate: self)
        let weekOfYear = components.weekOfYear

        return weekOfYear
        }
    }

I couldn't go any further than this. Any help is appreciated. Regards.


原文:
更新时间:2022-09-14 15:09

最满意答案

你的"#{price}".to_i没有做任何有意义的事情。 它只是在代码中的该位置留下一个整数,并且不使用。 如果你做price = price.to_i ,那么它可能会起作用。

作为一般性提示,当您想要查看正在发生的事情时,请使用p而不是puts 。 你的使用puts让你很难在比较之前判断price仍然是一个字符串。 如果您使用了p ,那么您就可以区分字符串和数字。


Your "#{price}".to_i is not doing anything meaningful. It is just leaving an integer in that position in the code, and is not used. If you do price = price.to_i, then it will probably work.

As a general tip, when you want to look into what is happening, use p rather than puts. Your using puts made it difficult for you to tell that price is still a string right before the comparison. If you had used p, then you would have been able to distinguish a string and numeral.

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