ios - Swift 3日历添加分钟不改变日期

Question

在 Swift 3 中，我无法通过在一天中添加分钟来更改日期。时间按照预期变化，但日期没有变化，例如，将 180 分钟添加到 31.10.2016 2200 会导致 31.10.2016 0100，而不是 01.11.2016 0100。

func getDayByAddingMinutes(date: String, minutes: Int) -> String{
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "dd.MM.yyyy hh:mm"
    let calendar = Calendar.current
    let akt = (dateFormatter.date(from: date)! as Date?)!
    let calculatedDate = calendar.date(byAdding: .minute, value: minutes, to: akt )
    print("\(akt) +  \(minutes)")
    let dateFormatter2 = DateFormatter()
    dateFormatter2.dateFormat = "dd.MM.yyyy"
    let newDate = dateFormatter2.string(from: calculatedDate!);
    print("\(date) +  \(newDate)")
    return "\(newDate)";
}

Answer 1

试试这个:

func getDayByAddingMinutes(date: String, minutes: Int) -> String{
    let dateFormatter = DateFormatter()
    dateFormatter.dateFormat = "dd.MM.yyyy HH:mm" 
    let calendar = Calendar.current
    let akt = (dateFormatter.date(from: date)! as Date?)!
    let calculatedDate = calendar.date(byAdding: .minute, value: minutes, to: akt )
    print("\(akt) +  \(minutes)")
    let dateFormatter2 = DateFormatter()
    dateFormatter2.dateFormat = "dd.MM.yyyy"
    let newDate = dateFormatter.string(from: calculatedDate!);
    print("\(date) +  \(newDate)")
    return "\(newDate)";
}

您使用了hh而不是HH。

希望这对你有帮助:)