iOS - Globally change navigation bar title color using appearance?

Question

This crashes the app:

[[UINavigationBar appearance] setTitleColor:[UIColor darkGrayColor] forState:UIControlStateNormal];

Is there a way to do

Answer 1

I used following code to change the title bar's color.

NSShadow *shadow = [[NSShadow alloc] init];
shadow.shadowColor = [UIColor blackColor];
shadow.shadowOffset = CGSizeMake(1, 0);

NSDictionary *titleTextAttributes = @{NSForegroundColorAttributeName:[UIColor whiteColor],
                                            NSShadowAttributeName:shadow};

[[UINavigationBar appearance] setTitleTextAttributes:titleTextAttributes];