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

The @RyJ answer is great and worked for me. Thought I'd chip in that there's a good tutorial on this in Ray Wenderlich's site, titled (excuse the pun):

User Interface Customization in iOS 6

See the section Customizing UINavigationBar

Here's the code snippet for the navigation bar title, to change globally:

// Customize the title text for *all* UINavigationBars
[[UINavigationBar appearance] setTitleTextAttributes:
 [NSDictionary dictionaryWithObjectsAndKeys:
  [UIColor colorWithRed:255.0/255.0 green:255.0/255.0 blue:255.0/255.0 alpha:1.0],
  UITextAttributeTextColor,
  [UIColor colorWithRed:0.0 green:0.0 blue:0.0 alpha:0.8],
  UITextAttributeTextShadowColor,
  [NSValue valueWithUIOffset:UIOffsetMake(0, -1)],
  UITextAttributeTextShadowOffset,
  [UIFont fontWithName:@"Arial-Bold" size:0.0],
  UITextAttributeFont,
  nil]];

One other minor point is that it seems there's a default shadow on the title bar, so to get rid of it, you can't just remove the attribute. Instead you have to set a shadow offset:

UITextAttributeTextShadowOffset : [NSValue valueWithUIOffset:UIOffsetMake(0, 0)]