Previous, Next, Done buttons appears in white color.
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"7.0")) {
[[UINavigationBar appearance]setBarTintColor:[UIColor whiteColor]];
[[UIBarButtonItem appearance] setTintColor:[UIColor whiteColor]];
} else {
[[UINavigationBar appearance]setTintColor:[UIColor whiteColor]];
}
[[UINavigationBar appearance]setBackgroundImage:[UIImage imageNamed:@"invite_friend_notify_bar"] forBarMetrics:UIBarMetricsDefault];
NSDictionary *attributes = [NSDictionary dictionaryWithObjectsAndKeys:
[UIFont fontWithName:@"Helvetica-Light" size:20], NSFontAttributeName,
[UIColor whiteColor], NSForegroundColorAttributeName, nil];
[[UINavigationBar appearance] setTitleTextAttributes:attributes];
[[UIBarButtonItem appearance] setTintColor:[UIColor whiteColor]];
}