一种返回两个日期之间的日期数组的方法-Swift 3 [英] A method which returns an array of dates that are in between two dates - Swift 3

问题描述

我正在尝试获取一个对象的时间戳与未来30天之间的日期数组。

I'm trying to get an array of dates between the time stamp of one of my objects and 30 days into the future.

我使用了下面的代码，但是我没有得到想要的结果，并且在尝试创建标题中描述的方法时遇到了麻烦。任何帮助都会很棒，谢谢。

I've used the code below but i'm not getting the desired result and am having trouble trying to make a method described in the title. Any help would be great, thank you.

var dates = [Date]()
    func fetchDays() {
            let cal = Calendar.current

            var dateComponents = DateComponents()
            dateComponents.year = 2017
            dateComponents.month = 2
            dateComponents.day = 12

            guard let startDate = cal.date(from: dateComponents) else {
                return }

            var start = cal.startOfDay(for: startDate)

            for _ in 0 ... 30 {
    guard let daysBetween = cal.date(byAdding: .day, value: 1, to: startDate) else { return }
                start = daysBetween
                dates.append(start)
            }
        }

推荐答案

您将1加上相同的开始日期，因此您的数组将一遍又一遍地填充相同的日期。只需将 1 替换为循环索引+ 1。

You are adding 1 to the same start date so your array is filled with the same date over and over. Simply replace 1 with the loop index + 1.

for i in 0 ... 30 {
    if let newDate = cal.date(byAdding: .day, value: i + 1, to: startDate) {
        dates.append(newDate)
    }
}

您不需要开始变量。

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