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iOS Build a Diary App Using Core Data Custom UITableViewCell UIAppearance to Customize the Navigation Bar

What did i do wrong? UIApperance

On challenge

 @property (strong,nonatomic) UINavigationBar *appearance;

 _appearance = [UINavigationBar appearance];

I got an error that said Bummer! The appearance proxy is accessed by calling the method 'appearance' on the classname: [Classname appearance]!

nevermind, i find solution by doing this :

UINavigationBar *appearance = [UINavigationBar appearance];