Color wheel or color picker in iOS

Question

How can I make a color wheel, color picker, or hue selector in iOS for use on the iPad.

Here is an example picture of a color picker similar to what I want.

Answer 1

My color picker, easy to integrate https://github.com/sakrist/VBColorPicker

Answer 2

I know this question's been already answered and accepted, but all of github projects that's been mentioned here looks like deprecated and obsolete. I've found RSColorPicker which is easy to use and has all the functionalities that i was looking for. Most importantly it's not obsolete.

Answer 3

I did create a sector of a color wheel in draw(_ rect: CGRect). See here.

That my color wheel:

This view based on the next lines of code:

override func draw(_ rect: CGRect) {
    guard let context = UIGraphicsGetCurrentContext() else {
        return
    }

    // Choice width and x position of a rect where will be placed you picker
    for x in stride(from: bounds.midX - bounds.height, to: bounds.midX + bounds.height, by: elementSize) {

        // Choice height and y position of the rect
        for y in stride(from: 0, to: rect.height, by: elementSize) {

            // Select color for a point
            context.setFillColor(colorFor(x: x, y: y))

            // Select color for the point with elementSize which we declare and init as class property
            context.fill(CGRect(x: x, y: y, width: elementSize, height: elementSize))
        }
    }
}

Answer 4

This post could help you out. One easy way to pick a color is to get the color of a pixel in an image you supply. This github project also has full source for a color picker.

Answer 5

You don't need 3rd party code if you target your app to iOS 14. It has the UIColorPickerViewController and it's quite straightforward.

let picker = UIColorPickerViewController()
picker.delegate = self
present(picker, animated: true, completion: nil)

You can set the intitial selectedColor, or change supportsAlpha to false to hide the alpha slider and only allow opaque colors.

Answer 6

Nothing wrong with the other answers. I am just sharing another color picker created using Swift.