从日期范围创建日期的字符串数组 [英] Create string array of dates from Dates range

问题描述

我具有Date()属性. startingAt和endingAt.还有一个Date()数组，它们是alreadyRegistred.我必须创建一个日期在startingAt和endingAt之间的字符串数组.包括StartingAt和endingAt，最后一个要求是排除alreadyRegistred日期.

I have Date() properties. startingAt and endingAt. And an array of Date(), which are alreadyRegistred. I have to create an array of strings with dates between startingAt and endingAt. StartingAt and endingAt are included and the last requirement is to exclude alreadyRegistred dates.

您有一些优雅的主意，怎么做?感谢您的帮助！

Do you have some elegant idea, how to do it? Thanks for help!

最终数组中的最大日期数约为7天.

Maximum number of dates in final array will be about 7 days.

推荐答案

尝试一下，看看:

// Start & End date string
let startingAt = "01/01/2018"
let endingAt = "08/03/2018"

// Sample date formatter
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy"

// start and end date object from string dates
var startDate = dateFormatter.date(from: startingAt) ?? Date()
let endDate = dateFormatter.date(from: endingAt) ?? Date()

// String date array, to be excluded
let alreadyRegistred = ["01/01/2018", "15/01/2018", "10/02/2018", "20/02/2018", "05/03/2018"]

// Actual operational logic
var dateRange: [String] = []
while startDate <= endDate {
    let stringDate = dateFormatter.string(from: startDate)

    startDate = Calendar.current.date(byAdding: .day, value: 1, to: startDate) ?? Date()
    if (alreadyRegistred.contains(stringDate)) {
        continue
    } else {
        dateRange.append(stringDate)
    }

}

print("Resulting Array - \(dateRange)")

这是结果:

结果数组-["02/01/2018"，"03/01/2018"，"04/01/2018"，"05/01/2018"，"06/01/2018"，"07/01/2018，" 08/01/2018，" 09/01/2018，" 10/01/2018，" 11/01/2018，" 12/01/2018，" 13/01/2018，" 14/01/2018，" 16/01/2018，" 17/01/2018，" 18/01/2018，" 19/01/2018，" 20/01/2018"，"21/01/2018"，"22/01/2018"，"23/01/2018"，"24/01/2018"，"25/01/2018"，"26/01/2018"，"27/01/2018"，"28/01/2018"，"29/01/2018"，"30/01/2018"，"31/01/2018"，"01/02/2018"，"02/02/2018"，"03/02/2018"，"04/02/2018"，"05/02/2018"，"06/02/2018"，"07/02/2018"，"08/02/" 2018，" 09/02/2018，" 11/02/2018，" 12/02/2018，" 13/02/2018，" 14/02/2018，" 15/02/2018"，"16/02/2018"，"17/02/2018"，"18/02/2018"，"19/02/2018"，"21/02/2018"，"22/02/2018"，"23/02/2018"，"24/02/2018"，"25/02/2018"，"26/02/2018"，"27/02/2018"，"28/02/2018"，"01/03/2018"，"02/03/2018"，"03/03/2018"，"04/03/2018"，"06/03/2018"，"07/03/2018"，"08/03/2018]

Resulting Array - ["02/01/2018", "03/01/2018", "04/01/2018", "05/01/2018", "06/01/2018", "07/01/2018", "08/01/2018", "09/01/2018", "10/01/2018", "11/01/2018", "12/01/2018", "13/01/2018", "14/01/2018", "16/01/2018", "17/01/2018", "18/01/2018", "19/01/2018", "20/01/2018", "21/01/2018", "22/01/2018", "23/01/2018", "24/01/2018", "25/01/2018", "26/01/2018", "27/01/2018", "28/01/2018", "29/01/2018", "30/01/2018", "31/01/2018", "01/02/2018", "02/02/2018", "03/02/2018", "04/02/2018", "05/02/2018", "06/02/2018", "07/02/2018", "08/02/2018", "09/02/2018", "11/02/2018", "12/02/2018", "13/02/2018", "14/02/2018", "15/02/2018", "16/02/2018", "17/02/2018", "18/02/2018", "19/02/2018", "21/02/2018", "22/02/2018", "23/02/2018", "24/02/2018", "25/02/2018", "26/02/2018", "27/02/2018", "28/02/2018", "01/03/2018", "02/03/2018", "03/03/2018", "04/03/2018", "06/03/2018", "07/03/2018", "08/03/2018"]

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