I want to change below code with storyboard with Xcode 4.2.
UIViewController * example = [[ExampleViewController alloc] initWithNibName:@\"ExampleViewCon
If neither of the above are true, i.e. your view controller is on the storyboard but no segue connects to it, then you want UIStoryboard's instantiateViewControllerWithIdentifier:
method described in the documentation. You have to set the identifier in the storyboard for this to work.
The UIStoryboard class is your friend:
UIStoryboard* sb = [UIStoryboard storyboardWithName:@"mystoryboard"
bundle:nil];
UIViewController* vc = [sb instantiateViewControllerWithIdentifier:@"ExampleViewController"];