Question

我已将日期选择器设置为文本字段的输入视图。日期选择器的最小日期和间隔分钟为15.现在它给出了更改值更改委托中的旋转的正确日期。但是如果我没有旋转选择器并点击完成按钮并且首先选择默认值，则它仅提供当前日期。我希望它能给我一个默认显示在选择器中的日期。这是代码：

class ViewController: UIViewController {

    @IBOutlet weak var timeField: UITextField!

    var datePicker:UIDatePicker!

    override func viewDidLoad() {
        super.viewDidLoad()

    }

    @IBAction func CallPicker(sender: UITextField) {

        let datePickerView:UIDatePicker = UIDatePicker()
        datePickerView.datePickerMode = UIDatePickerMode.DateAndTime
        datePickerView.minuteInterval = 15
        datePickerView.minimumDate = NSDate()
        datePicker = datePickerView

        let toolBar = UIToolbar()
        toolBar.sizeToFit()
        let spaceButton = UIBarButtonItem(barButtonSystemItem: .FlexibleSpace, target: nil, action: nil)
        let doneButton = UIBarButtonItem(title: "Done", style: .Plain, target: self, action: "doneTapped")
        toolBar.setItems([spaceButton, doneButton], animated: false)
        toolBar.userInteractionEnabled = true

        sender.inputView = datePickerView
        sender.inputAccessoryView = toolBar
        datePickerView.addTarget(self, action: Selector("datePickerValueChanged:"), forControlEvents: UIControlEvents.ValueChanged)
    }

    func doneTapped() {
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateStyle = .MediumStyle
        dateFormatter.timeStyle = .MediumStyle
        timeField.text = dateFormatter.stringFromDate(datePicker.date)
        timeField.resignFirstResponder()
    }

    func datePickerValueChanged(sender: UIDatePicker) {
        let dateFormatter = NSDateFormatter()
        dateFormatter.dateStyle = .MediumStyle
        dateFormatter.timeStyle = .MediumStyle
        timeField.text = dateFormatter.stringFromDate(sender.date)
    }

}

场景：现在假设它的8:42。日期选择器将显示8:30作为第一个条目，但是当我点击完成按钮时，它将仅提供当前时间8:42。然而，如果我滚动旋转并返回第一个条目，它的效果会很好。

Answer 1

选择日期后，请尝试使用以下代码

    let userDateFormate = NSDateFormatter()
    userDateFormate.dateFormat = "MMMM dd, yyyy"
    let dateString = userDateFormate.stringFromDate(date)

    dateFormate.dateFormat = "MMMM dd, yyyy"
    dateFormate.timeZone = NSTimeZone.init(forSecondsFromGMT: 0)
    let dateValue = dateFormate.dateFromString(dateString)

Answer 2

我也面临同样的问题，解决方法是在Calender.current.dateComponents的帮助下为UIDatePicker设置一个较晚的时间。

func patchTime(){
    var components = Calendar.current.dateComponents([.hour, .minute], from: self.timePicker.date);
    components.hour = (components.hour ?? 0) + 1
    components.minute = 0

    let calendar = Calendar.current
    let date = calendar.date(from: components)
    self.timePicker.date = date!;

}

当前我用于时间选择器，但如果还需要日期，则模式将相同

Answer 3

你只需要将datePicker的date属性从当前日期设置为custom，然后就可以了。

ios swift datepicker完成按钮，错误的日期与间隔

3 个答案: