带有最小日期的Swift Datepicker

Question

Goord Morning在一起，

我有一个iOS 8和Swift的应用程序。 在UIViewcontroller中有一个UIDatepicker

我设定了最低日期。 例如今天的日期：2 | 五月 使用此解决方案的2015年，应该无法设置过去的日期

但如果要将此日期设置为15 | 一月 2016年我将第一天设置为比一月的第一天15，但随后UIDatepicker返回最短日期2015年5月2日

我们是否有可能将日期更改为15，将月份更改为一月，将年份自动更改为2016？

Answer 1

让您的minimumDate取消设置，然后尝试通过代码进行配置...

尝试这个：

@IBAction func changeValue(sender: UIDatePicker) 
{

    //Get time Now, and convert to a NSCalendar
    //Specify the minimun date if you want.
    let now = NSDate()
    let nowCalendar = NSCalendar.currentCalendar()
    let nowComponents = nowCalendar.components([.Day, .Month, .Year], fromDate: now)

    //Compare if date is lesser than now and then create a new date
    if nowCalendar.compareDate(sender.date, toDate: now, toUnitGranularity: [.Day, .Month, .Year]) == NSComparisonResult.OrderedAscending
    {

        let dateCalendar = NSCalendar.currentCalendar()
        let dateComponents = dateCalendar.components([.Day, .Month, .Year], fromDate: sender.date)

        dateComponents.year = nowComponents.year + 1
        let newDate = dateCalendar.dateFromComponents(dateComponents)
        sender.date = newDate!
    }

}

Answer 2

///Swift4 Version - I think it may works with 3 too.
@IBAction func changeValue(sender: UIDatePicker)
{

    //Get time Now, and convert to a NSCalendar
    //Specify the minimun date if you want.
    let now = Date()
    let nowCalendar = Calendar.current
    let nowComponents = nowCalendar.dateComponents([.day, .month, .year], from: now)

    //Compare if date is lesser than now and then create a new date
    if nowCalendar.compare(sender.date, to: now, toGranularity: Calendar.Component.day) == ComparisonResult.orderedAscending
    {
        var dateCalendar = Calendar.current
        var dateComponents = dateCalendar.dateComponents([.day, .month, .year], from: sender.date)

        guard let year = nowComponents.year else { return }

        dateComponents.year = year + 1
        let newDate = dateCalendar.date(from:dateComponents)
        sender.date = newDate!
    }
}

如果您想玩一点，我发布了一个在操场上工作的完整示例。 https://gist.github.com/dedeexe/4878f78d7e1d5fe8b372ef84de629b59

Answer 3

快速4：

我有这个 1.我的功能：

func AddDaysToToday(days: Int) -> Date? {
    var dateComponents = DateComponents()
    dateComponents.day = days

    return Func.GetCalendar(tz: .utc).date(byAdding: dateComponents, to: Date()) //you can return your own Date here.
}

2. 在我的VC中：

    let today = DateFunc.AddDaysToToday(days: 0) datePicker.minimumDate = today