将未知格式（任何格式）的字符串转换为日期

Xpre 9•Swift 4 或 Xpre 8.3.2•Swift 3.1

您可以按以下方式使用NSDataDetector：

extension String {    var nsString: NSString { return self as NSString }    var length: Int { return nsString.length }    var nsRange: NSRange { return NSRange(location: 0, length: length) }    var detectDates: [Date]? {        return try? NSDataDetector(types: NSTextCheckingResult.CheckingType.date.rawValue)     .matches(in: self, range: nsRange)     .flatMap{$0.date}    }}extension Collection where Iterator.Element == String {    var dates: [Date] {        return flatMap{$0.detectDates}.flatMap{$0}    }}

测试：

let dateStrings = ["January 3, 1966","Jan 3, 1966", "3 Jan 1966"]for dateString in dateStrings {    if let dateDetected = dateString.detectDates?.first {        print(dateDetected)        // 1966-01-03 14:00:00 +0000        // 1966-01-03 14:00:00 +0000        // 1966-01-03 14:00:00 +0000    }}let dateStrings = ["January 3, 1966","Jan 3, 1966", "3 Jan 1966"]for date in dateStrings.dates {    print(date)    // 1966-01-03 14:00:00 +0000    // 1966-01-03 14:00:00 +0000    // 1966-01-03 14:00:00 +0000}