I've been trying to save a selected color with UserDefaults from UIColorPickerViewController. But I run into a color space fiasco. Anyway, here come my lines of code.
class ViewController: UIViewController, UIColorPickerViewControllerDelegate {
@IBOutlet weak var imageView: UIImageView!
@IBAction func selectTapped(_ sender: UIButton) {
let picker = UIColorPickerViewController()
picker.delegate = self
picker.selectedColor = .yellow
picker.supportsAlpha = false
present(picker, animated: true, completion: nil)
}
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
super.viewDidAppear(animated)
if let color = UserDefaultsUIColor.shared.readColor(key: "MyColor") {
print("Color being read: \(color)")
}
}
func colorPickerViewControllerDidFinish(_ viewController: UIColorPickerViewController) {
let color = viewController.selectedColor
print("Selected color: \(color)")
UserDefaultsUIColor.shared.saveColor(color: viewController.selectedColor, key: "MyColor")
}
func colorPickerViewControllerDidSelectColor(_ viewController: UIColorPickerViewController) {
imageView.backgroundColor = viewController.selectedColor
}
}
class UserDefaultsUIColor {
static let shared = UserDefaultsUIColor()
func saveColor(color: UIColor, key: String) {
let userDefaults = UserDefaults.standard
do {
let data = try NSKeyedArchiver.archivedData(withRootObject: color, requiringSecureCoding: false) as NSData?
userDefaults.set(data, forKey: key)
} catch {
print("Error UserDefaults: \(error.localizedDescription)")
}
}
func readColor(key: String) -> UIColor? {
let userDefaults = UserDefaults.standard
if let data = userDefaults.data(forKey: key) {
do {
if let color = try NSKeyedUnarchiver.unarchivedObject(ofClass: UIColor.self, from: data) {
return color
}
} catch {
print("Error UserDefaults")
}
}
return nil
}
}
I first start out with a yellow color (UIColor.yellow). And I select a color whose RGB values are 76, 212, 158, respectively. And the color picker guy returns the following.
kCGColorSpaceModelRGB 0.298039 0.831373 0.619608 1
And I get the following in reading the saved color data object.
UIExtendedSRGBColorSpace -0.270778 0.84506 0.603229 1
How can I save and read color data objects consistently? I could specify a color space when I save a color. But it doesn't go well.
Muchos thankos
Señor Tomato de Source
