How to set default label color based on dark/light mode (in Swift)

Question

I am trying to update my iOS app for dark mode, but am having trouble with setting the dark mode colors in code. Upon editing a UITextView, the color I want the text color to be white in dark mode, and black in light mode (which is default label color), but to my knowledge I do not know how to write this in code, how do I do it?

extension AddCardsVC: UITextViewDelegate {
    func textViewDidBeginEditing(_ textView: UITextView) {
        if #available(iOS 13.0, *) {
            definitionInput.textColor = UIColor.(need default label color)
        } else {
            definitionInput.textColor = UIColor.black
        }
        if(definitionInput.text == "organizing items into familiar, manageable units; often occurs automatically"){
            definitionInput.text = ""
        }
    }

}

score 21 · Answer 1 · answered Aug 07 '20 at 16:02

21

Or use UIColor.label to get system label color.

answered Aug 07 '20 at 16:02

G.Song

310
2
5

score 10 · Answer 2 · answered Mar 27 '20 at 06:08

10

you have call this line of code , it works fine both dark mode and light mode. goodluck

label.textColor = .none

answered Mar 27 '20 at 06:08

Raj.Rathod

99
4

This works great for UILabels as the documentation says : The default value for this property is the system’s label color, which adapts dynamically to Dark Mode changes. However it does NOT work for me for a UITextView, documentation : The default text color is black. – Michael Pirotte Nov 18 '20 at 11:07

score 3 · Accepted Answer · answered Jan 29 '20 at 22:04

   textView.textColor =  UIColor { tc in
            switch tc.userInterfaceStyle {
            case .dark:
                return UIColor.white
            default:
                return UIColor.black
            }
        }

This is the easiest way, the UIColor can be passed a closure with traitCollection (TC) and the traitCollection has a property called userInterfaceStyle which tells if the user is using the dark mode, then you just implement switch statement to choose what color you wanna return

score 0 · Answer 4 · answered Jan 30 '20 at 06:44

0

you just need to assign UIColor.systemBackground to your UITextView Text Color

textView.textColor =  UIColor.systemBackground

it will automatically change text color white in dark mode and text color black in light mode

answered Jan 30 '20 at 06:44

Chetan Hedamba

293
2
9

You have it opposite. This would make the text white in light mode, and dark in dark mode.... – Eric May 28 '21 at 21:17

score 0 · Answer 5 · edited Aug 21 '22 at 20:24

0

textView.textColor =  .placeholderText

edited Aug 21 '22 at 20:24

shim

9,289
12
69
108

answered Aug 20 '22 at 13:37

Akel barbosa

1

1

Please add a short explanation for why this addresses the question. – Bek Aug 21 '22 at 14:26

How to set default label color based on dark/light mode (in Swift)

5 Answers5