Saving UIColor to RLMObject subclass - realm

Question

Does Realm support UIColors?
How does one go about adding a UIColor property to a subclass of RLMObject, and what is the recommended method for doing so?
Thank you for the help!

Answer 1

Realm does not directly support reading and writing UIColor objects.
That being said, it should be relatively easy to convert a UIColor to a format that can be saved to Realm, and then convert it back again on demand.
There's no officially recommended way, but the way I would recommend is to convert the UIColor to its hexadecimal version, and save it as a string to the Realm object.
There are many libraries on GitHub for performing UIColor to hexadecimal conversions, such as this one: https://github.com/nicklockwood/ColorUtils
Good luck!

Answer 2

I created a superclass which allows any NSObject that supports NSCoding to be saved as a Data object in realm.
class RLMArchiveableObject : Object {
dynamic var data: Data?
var object: Any? {
get {
return (data == nil) ? nil : NSKeyedUnarchiver.unarchiveObject(with: data!)
}
set {
data = (newValue == nil) ? nil : NSKeyedArchiver.archivedData(withRootObject: newValue!)
}
}
override class func ignoredProperties() -> [String] {
return ["object"]
}
}

Answer 3

you just need to convert color to string and save that string to realm
extension UIColor {
func toString() -> String {
let colorRef = self.cgColor
return CIColor(cgColor: colorRef).stringRepresentation
}
}

Answer 4

I was able to achieve the desired result by adding three float values to the subclassed RLMObject representing the RGB values of the UIColor.
For those having similar problems, I have included my solution below.
Interface File
#interface LFKColor : RLMObject
#property NSString *name;
#property float redColor;
#property float blueColor;
#property float greenColor;
#property (nonatomic, strong) UIColor *color;
#end
Implementation File
#implementation LFKColor
#synthesize color;
+ (NSString *)primaryKey {
return #"name";
}
+ (NSArray *)ignoredProperties {
return #[#"color"];
}
-(void)setColor:(UIColor *)selectedColor {
self->color = selectedColor;
const CGFloat* components = CGColorGetComponents(selectedColor.CGColor);
self.redColor = components[0];
self.greenColor = components[1];
self.blueColor = components[2];
}
-(UIColor *)color {
return [[UIColor alloc] initWithRed:self.redColor green:self.greenColor blue:self.blueColor alpha:1.0];
}
#end