swift - "EEE, dd MMM yyyy hh:mm:ss zzz"字符串转日期

Question

亲爱的，帮助将字符串转换为“Mon, 10 Apr 2017, 10:00:00 PDT” to Date我的代码如下，不幸的是它会导致错误:

extension String {    
    func getDate() -> Date {
       let formatter = DateFormatter()

       formatter.dateFormat = "EEE, dd MMM yyyy hh:mm:ss zzz"
       return formatter.date(from: self)! // Returns "Mon, 10 Apr 2017, 10:00:00 PDT"
    }
}

Answer 1

有两个问题。您需要在年份之后添加一个逗号，并在日期格式中使用 HH(24 小时)而不是 hh(12 小时):

extension Formatter {
    static let date = DateFormatter()
}

extension String {
    var getDate: Date? {
        Formatter.date.locale = Locale(identifier: "en_US_POSIX")
        Formatter.date.dateFormat = "EEE, dd MMM yyyy, HH:mm:ss zzz"
        return Formatter.date.date(from: self)
    }
}

---

let dateString =  "Mon, 10 Apr 2017, 10:00:00 PDT"
if let date = dateString.getDate {
    Formatter.date.timeZone = TimeZone(abbreviation: "PDT")
    Formatter.date.string(from: date)  // Mon, 10 Apr 2017, 10:00:00 PDT
}