Recently I read this article about observing variable changes using combine. It's working great but I like to wrap UserDefaults in another class just not to mix UserDefaults functions with my custom made ones and once I used the same code not in an extension but part of the wrapping class itself (UserDefaultsManager), the combine publisher was never executed.
class UserDefaultsManager : NSObject {
@objc var musicVolume: Float {
get {
return float(forKey: "music_volume")
}
set {
set(newValue, forKey: "music_volume")
}
}
}
...
UserDefaultsManager.shared.publisher(for: \.musicVolume) // this doesn't work now
When I move the musicVolume definition into an extension, combine publisher starts to work again:
class UserDefaultsManager : NSObject {
}
extension UserDefaultsManager {
@objc var musicVolume: Float {
get {
return float(forKey: "music_volume")
}
set {
set(newValue, forKey: "music_volume")
}
}
}
...
UserDefaultsManager.shared.publisher(for: \.musicVolume) // this works now
Anyone has an idea why it works only in extension?
I tried to look in the docs of extension and combine but I think I missed something. I will be happy to know why it's like this.
