Encode UIColor causes UIDeviceRGBColor leak

Number:rdar://29095801 Date Originated:03-Nov-2016
Status:Open Resolved:17-Nov-2016
Product:iOS SDK Product Version:iOS 10.1
Classification: Reproducible:Yes
Encoding a custom object with a UIColor in RGB color space causes a memory leak.

Steps to Reproduce:
1. Create custom class with NSCoding, that encodes a UIColor.
2. Instantiate instance variable of custom class with a UIColor using RGBA.
3. Run app and select Debug Memory Graph.
4. Open Issue Navigator, select Runtime, see memory leak.
(See code below)

Expected Results:
Expect to not see this memory leak.

Actual Results:
Memory leak message:
"runtime: Memory Issues – (1 leaked type): 1 instance of UIDeviceRGBColor leaked"

iOS 10.1

Instantiating the UIColor with a type property (i.e. UIColor.red) does not create the leak.

Code to reproduce: (project included in Apple bug reporter)
class ColorObject: NSObject, NSCoding {
    var detailsColor:UIColor
    init(detailsColor:UIColor) {
        self.detailsColor = detailsColor
    // MARK: NSCoding
    convenience required init?(coder aDecoder: NSCoder) {
        guard let detailsColor = aDecoder.decodeObject(forKey:"detailsColor") as? UIColor else { return nil }
            detailsColor: detailsColor
    func encode(with aCoder: NSCoder) {
        aCoder.encode(detailsColor, forKey: "detailsColor")

class ViewController: UIViewController {
    var colorObject:ColorObject = ColorObject(detailsColor: UIColor(red: 1, green: 1, blue: 1, alpha: 1))   //UIDeviceRGBColor Memory leak
    //var colorObject:ColorObject = ColorObject(detailsColor: UIColor.red) //No problem
    override func viewDidLoad() {


Problem seems to be resolved.

By craiggrummitt at March 13, 2017, 4 p.m. (reply...)

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