如何将日期字符串添加到 UIDatePicker SWIFT

Question

I have a date string, and I want setDate in UIDatePicker

@IBOutlet weak var dp: UIDatePicker!    

override func viewDidLoad() {

    super.viewDidLoad()

    var dateFormatter = NSDateFormatter()

    dateFormatter.dateFormat = "dd-MM-yyyy"

    var dateString = "02-05-2016"

    dp.date = dateFormatter.dateFromString(dateString)!


}

not work

Error: fatal error: unexpectedly found nil while unwrapping an Optional value

Answer 1

The method dateFromString returns an optional. If the conversion fails, it returns a nil. You are getting a nil, so there must be something wrong with your format string.

I don't use date format strings often enough to have them memorized, so I'd have to go read the specs. I suggest you do that.