How to overide UIToolbar method with later version of iOS 4.2 - iphone

Question

This code works fine with iPad Simulator 4.2, but not with later version of iOS4.3 or after that.I am not able to Override the UIToolbar class methods.
#implementation UIToolbar (CustomImage)
- (void)drawRect:(CGRect)rect
{
UIImage *image = [[UIImage imageNamed:#"ToolBar.png"] retain];
[image drawInRect:rect];
[image release];
}
//return 'best' size to fit given size. does not actually resize view. Default is return existing view size
- (CGSize)sizeThatFits:(CGSize)size {
CGSize result = [super sizeThatFits:size];
result.height = 80;
return result;
};
What would be the alternate solution for this ?Please guide me.
In later version ..- (void)drawRect:(CGRect)rect is never called .
Running with iPad Simulator 4.2 code works fine but with iPad Simulator 4.3 drawRect in never called.
Below is the Screenshot of Toolbar:

Answer 1

What about something like this?
#implementation UIToolbar (UIToolbarCategory)
- (void)drawRect:(CGRect)rect
{
[super drawRect:rect];
if([self isMemberOfClass: [UIToolbar class]]){
[super drawRect:rect];
UIImage *image = [UIImage imageNamed:#"bar_gradient.png"];
[image drawInRect:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
}
}
#end

Answer 2

you are implementing it as a category, you need to subclass UIToolBar based on the iOS5 change log
In the iOS 5 beta, the UINavigationBar,
UIToolbar, and UITabBar implementations have changed so that the
drawRect: method is not called on instances of these classes unless it
is implemented in a subclass.
Apps that have re-implemented drawRect: in a category on any of these
classes will find that the drawRect: method isn’t called.
UIKit does link-checking to keep the method from being called in apps
linked before iOS 5 but does not support this design on iOS 5 or
later. Apps can either:
Use the customization API for bars that in iOS 5 and later, which is the preferred way.
Subclass UINavigationBar (or the other bar classes) and override drawRect: in the subclass.