What should I do to adapt my app to iOS 5.0 keeping compatibility with iOS 4

Question

I\'ve started playing with iOS 5 today and I\'ve seen that XCode 4.2 only let me select iOS 5 as Base SDK but not iOS 4.

Until now I\'ve overwriting drawRect: method in

Answer 1

Another way to customized your header is like this.

UIImage *image = [UIImage imageNamed:@"header.png"];

if([navigationBar respondsToSelector:@selector(setBackgroundImage:forBarMetrics:)] ) {
    //iOS 5 new UINavigationBar custom background
    [navigationBar setBackgroundImage:image forBarMetrics: UIBarMetricsDefault];
} 
else{
    UIImageView *imgView = [[[UIImageView alloc] initWithImage:image] autorelease];
    [imgView setUserInteractionEnabled:NO];
    [imgView setTag:TOOLBAR_TAG];
    [navigationBar insertSubview:imgView atIndex:0];
}

Using the respondsToSelector you can know if the function is here.