Swift - 创建自定义颜色数组

Question

Is there a way to create an array of custom colors? I know I can create custom colors in class UIColors but in my case I need an array of my custom colors.

I would like to achieve something like this:

let listColors: [UIColor] = [
    let color1 = UIColor(displayP3Red: 1, green: 1, blue: 1, alpha: 1),
    let color2 = UIColor(displayP3Red: 2, green: 2, blue: 2, alpha: 1),
    let color3 = UIColor(displayP3Red: 3, green: 3, blue: 3, alpha: 1),
]

Answer 1

You don't need a subclass to create an array do

let listColors = [  
    UIColor(displayP3Red: 1, green: 1, blue: 1, alpha: 1),
    UIColor(displayP3Red: 2, green: 2, blue: 2, alpha: 1),
    UIColor(displayP3Red: 3, green: 3, blue: 3, alpha: 1)
]

access

listColors[index]

or

class Colors {

   static let color1 = UIColor(displayP3Red: 1, green: 1, blue: 1, alpha: 1)
   static let color2 = UIColor(displayP3Red: 2, green: 2, blue: 2, alpha: 1) 
   static let color3 = UIColor(displayP3Red: 3, green: 3, blue: 3, alpha: 1)

}

access

Colors.color1

or as global

let color1 = UIColor(displayP3Red: 1, green: 1, blue: 1, alpha: 1)
let color2 = UIColor(displayP3Red: 2, green: 2, blue: 2, alpha: 1) 
let color3 = UIColor(displayP3Red: 3, green: 3, blue: 3, alpha: 1)

access

color1

When you create a color divide by 255

UIColor(displayP3Red: 2/255.0, green: 2/255.0, blue: 2/255.0, alpha: 1)

Answer 2

Or if you want to be able to reference them by name or by array index:

let color1 = UIColor(red: 1.0, green: 1.0, blue: 1.0, alpha: 1.0), //White
let color2 = UIColor(red: 0.5, green: 0.5, blue: 0.5, alpha: 1.0), //Gray
let color3 = UIColor(red: 1.0, green: 0.0, blue: 0.0, alpha: 1.0), //Red

let listColors: [UIColor] = [color1, color2, color3]

Answer 3

If you are supporting dark and light modes in your App, it is best to define your custom colors as assets in your App and then access them something like this

extension String {
    static let blueColorName = "Blue"
    static let brownColorName = "Brown"
    static let crustaColorName = "Crusta"
    static let darkRedColorName = "DarkRed"
    static let defaultColorName = "Default"
    static let flamingoColorName = "Tango"
    static let khakiColorName = "Khaki"
    static let greenColorName = "Green"
    static let limeColorName = "Lime"
    static let lustColorName = "Lust"
    static let oliveColorName = "Olive"
    static let orangeColorName = "Orange"
    static let pinkColorName = "Pink"
    static let purpleColorName = "Purple"
    static let roseColorName = "Rose"
    static let redColorName = "Red"
    static let skyColorName = "Sky"
    static let steelColorName = "Steel"
    static let sunColorName = "Sun"
    static let tealColorName = "Teal"
    static let yellowColorName = "Yellow"
    // Tile Background Colors
    static let tileGrayColorName = "TileGray"
    static let tileGreenColorName = "TileGreen"
    static let tileRedColorName = "TileRed"
    static let tileYellowColorName = "TileYellow"
}

extension UIColor {
    
    // MARK: - Custom Color List For Color Picker

    static let customColorsList: [(colorName: String, uiColor: UIColor)] = [
        ("Orange", UIColor(named: .orangeColorName)!),
        ("Tango", UIColor(named: .flamingoColorName)!),
        ("Crusta", UIColor(named: .crustaColorName)!),
        ("Yellow", UIColor(named: .yellowColorName)!),
        ("Sun", UIColor(named: .sunColorName)!),
        ("Khaki", UIColor(named: .khakiColorName)!),
        ("Lime", UIColor(named: .limeColorName)!),
        ("Green", UIColor(named: .greenColorName)!),
        ("Olive", UIColor(named: .oliveColorName)!),
        ("Teal", UIColor(named: .tealColorName)!),
        ("Sky", UIColor(named: .skyColorName)!),
        ("Blue", UIColor(named: .blueColorName)!),
        ("Steel", UIColor(named: .steelColorName)!),
        ("Pink", UIColor(named: .pinkColorName)!),
        ("Rose", UIColor(named: .roseColorName)!),
        ("Purple", UIColor(named: .purpleColorName)!),
        ("Lust", UIColor(named: .lustColorName)!),
        ("Dark Red", UIColor(named: .darkRedColorName)!),
        ("Brown", UIColor(named: .brownColorName)!),
        ("Default", UIColor(named: .defaultColorName)!)
    ]
}