iOS5以上修改导航条上字体颜色

gistfile1.m

    NSMutableDictionary *titleBarAttributes = [NSMutableDictionary dictionaryWithDictionary: [[UINavigationBar appearance] titleTextAttributes]];
    [titleBarAttributes setValue:navBarTitleColor forKey:UITextAttributeTextColor];
    [titleBarAttributes setValue:[NSValue valueWithUIOffset:UIOffsetMake(0.f, 0.f)] forKey:UITextAttributeTextShadowOffset];
    [[UINavigationBar appearance] setTitleTextAttributes:titleBarAttributes];
    [[UINavigationBar appearance] setBackgroundColor:[UIColor clearColor]];
    [[UINavigationBar appearance] setTintColor:kNAVIGATIONBAR_BARBUTTON_COLOR];
    
    NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                [UIColor blackColor],
                                UITextAttributeTextColor,
                                [UIColor clearColor],
                                UITextAttributeTextShadowColor, nil];
    [[UIBarButtonItem appearance] setTitleTextAttributes: attributes
                                                forState: UIControlStateNormal];
    
    NSDictionary *highlightedAttributes = [NSDictionary dictionaryWithObjectsAndKeys:
                                           [UIColor blackColor],
                                           UITextAttributeTextColor,
                                           [UIColor clearColor],
                                           UITextAttributeTextShadowColor, nil];
    [[UIBarButtonItem appearance] setTitleTextAttributes: highlightedAttributes
                                                forState: UIControlStateHighlighted];