datePicker date using segue

Question

In SWIFT, I am using a viewcontroller (VC2) to hold a datePicker which I get the date from and pass it back to VC1. VC1 have a button which load VC2 through segue. The problem that when I get the first date and unwindsegue back to VC1 and next I try to tap the button in VC1 again to change the date I find the datePicker date is set to Today and not the last I chosen. How can I keep the first chosen date/time in the datePicker when I next try to change it?

I mean when the datePicker is used in the same VC the date/time chosen the first time will be kept in the datePicker if you decided to change the date again.

Regards, Mohamed

I tried the following: In VC1:

let storyBoard = UIStoryboard(name: "Main", bundle: nil)

var vc = storyBoard.instantiateViewControllerWithIdentifier("datePickerVc1") as! UIViewController

self.presentViewController(vc, animated: true, completion: nil)

In VC2:

@IBAction func exit(sender: AnyObject) {

  self.dismissViewControllerAnimated(true, completion: nil)

}

And still the datePicker returns to its default state i.e., the date will be back to Today's date.

Mohamed, may you provide some code to start with? Because the question is too generic — Farside, Apr 04 '16 at 11:30

score 1 · Answer 1 · edited May 23 '17 at 11:45

1

Thank you guys for your answers. I found the solution. Put the following code before leaving the modal view VC2:

let currentDate = datePicker.date
    NSUserDefaults.standardUserDefaults().setObject(currentDate, forKey: "Current-Date")

In viewDidLoad in VC2 put the following:

if let date = NSUserDefaults.standardUserDefaults().objectForKey("Current-Date") as? NSDate {
        datePicker.setDate(date, animated: true)

Thanks to David Silverfarmer in this link Save datePicker value using NSUserdefaults(xcode,swift2)

Thanks

Mohamed

edited May 23 '17 at 11:45

Community

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answered Apr 06 '16 at 06:24

hamoti71

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Thanks for sharing your solution while being a newbee here – TheBlastOne Apr 06 '16 at 07:01

score 0 · Answer 2 · answered Apr 04 '16 at 11:08

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If you create a local variable to keep hold of a reference to VC2 and show it on VC1 rather than using a segue then the state of VC2 will not change back to the default when you show it for a second time. I would suggest using a lazy variable to store it

answered Apr 04 '16 at 11:08

Swinny89

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No problem :) If this has fixed your issue please can you mark it as the correct answer? – Swinny89 Apr 04 '16 at 11:42

score 0 · Answer 3 · answered Apr 04 '16 at 11:11

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You can either keep a pointer to the date picker VS as Swinny suggests, or you can give your date picker view controller a startingDate property. If you do that, set startingDate in your VC1 prepareForSegue, and then in your date picker VC's viewWillAppear, install the starting date into the date picker.

answered Apr 04 '16 at 11:11

Duncan C

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I want to add that I am using present modally in segue. I know very easier solutions to utilize the datePicker like from the textField instead of the keyboard however, I liked that to show the datePicker as an alert or actionSheet. I am doing it like this url: http://www.totem.training/swift-ios-tips-tricks-tutorials-blog/ux-chops-dim-the-lights – hamoti71 Apr 04 '16 at 11:40
Understood. Both Swinny's and my answers assume that your date picker is in a separate view controller. – Duncan C Apr 04 '16 at 12:09

datePicker date using segue

3 Answers3