排序日期数组已排序升序迅速

Question

我正在尝试按升序对日期进行排序。我可以用"MM/dd/yyyy"格式解决日期，但是当更改为"dd mmm yyyy"格式时，会出现错误。

此作品

var dateArray = [Date]()

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

dateArray.append(dateFormatter.date(from: "09/04/2016")!)
dateArray.append(dateFormatter.date(from: "01/01/2000")!)
dateArray.append(dateFormatter.date(from: "12/12/1903")!)
dateArray.append(dateFormatter.date(from: "04/23/2222")!)
dateArray.append(dateFormatter.date(from: "08/06/1957")!)
dateArray.append(dateFormatter.date(from: "11/11/1911")!)
dateArray.append(dateFormatter.date(from: "02/05/1961")!)

dateArray.sort { (date1, date2) -> Bool in
    return date1.compare(date2) == ComparisonResult.orderedAscending
}

for date in dateArray {
    print(dateFormatter.string(from: date))
}

但是这不是

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd mmm yyyy"

dateArray.append(dateFormatter.date(from:"01 Mar 2017")!)
dateArray.append(dateFormatter.date(from: "03 Feb 2017")!)
dateArray.append(dateFormatter.date(from: "15 Jan 1998")!)

dateArray.sort { (date1, date2) -> Bool in
    return date1.compare(date2) == ComparisonResult.orderedAscending
}

for date in dateArray {
    print(dateFormatter.string(from: date))
}

Answer 1

您需要MMM的mmm字母

 dateFormatter.dateFormat = "dd MMM yyyy"