I am at my whits end trying to skin a UINavigationController in iOS 4.X (yes
iOS 4.x not 5.X, 5 is easy, that is taken care of).
So time and time again I am brought back to having to somehow override or
otherwise mangle the UINavigationBar.. So my question is this :
Can anyone show me how to override (or otherwise mangle) the UINavigationBar
AND get it inside the UINavigationController ? In Objective C, I could Swizzle
to swap implementations or use Category to essentially write an override.
If not, then I guess I'll have to roll my own NavigationController from
scratch. but I really would prefer to some how register an override as a
Category as that is probably the "cleanest" way to go.
FYI: Here is some code I tried with no luck (this should have been an XIBless
way to reconstitue the UINavigationController with an instance of my
CustomNavigationBar but it didn't fly.
[Register("CustomUINavigationBar")]
public class CustomUINavigationBar:UINavigationBar{
public CustomUINavigationBar(IntPtr handler):base(handler){}
public string BgFile{get;set;}
public override void Draw (RectangleF area)
{
UIImage image = new UIImage (BgFile);
image.Draw(new RectangleF(0,0,this.Frame.Width, this.Frame.Height));
}
}
then this little pare of methods acting like a "factory"
public static UINavigationController CreateNavController (UIViewController
rootView, UINavigationControllerDelegate navDelegate, string fileLoc)
{
UINavigationController newController = new UINavigationController ();
newController = styleNavController (newController, fileLoc);
newController.Delegate = navDelegate;
newController.PushViewController(rootView,false);
return newController;
}
public static UINavigationController styleNavController (UINavigationController
navController, string fileLoc)
{
if ((UIDevice.CurrentDevice.SystemVersion.CompareTo ("5") >= 0)) {
UINavigationBar bar = navController.NavigationBar;
UIImage image = UIImage.FromBundle (fileLoc);
bar.TintColor = UIColor.FromRGB (49, 37, 27);
bar.SetBackgroundImage (image, UIBarMetrics.Default);
return navController;
}
NSKeyedUnarchiver unarchiver = new NSKeyedUnarchiver
(NSKeyedArchiver.ArchivedDataWithRootObject (navController));
Class c = new Class(typeof(CustomUINavigationBar));
unarchiver.SetClass (new Class (typeof(CustomUINavigationBar)),
"UINavigationBar");
UINavigationController controller =
(UINavigationController)unarchiver.DecodeObject ("root");
((CustomUINavigationBar) controller.NavigationBar).BgFile = fileLoc;
return controller;
}
Despite the effort, the unarchive.SetClass() doesn't seem to actually change
the class of "UINavigationBar" like it should. because the DecodeObject call
just returns a NavigationController with the default UINavigationBar
initialized.
Thanks
Josh
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