It's pretty simple really. First, you need to make a view controller that sits under the one that's visible. You can send that view to the back like this:
[self.view sendSubviewToBack:menuViewController.view];
Then, you put a menu button on the left side of your navigation bar, and write a handler kind of like this:
- (void)menuButtonPressed:(id)sender {
CGRect destination = self.navigationController.view.frame;
if (destination.origin.x > 0) {
destination.origin.x = 0;
} else {
destination.origin.x += 254.5;
}
[UIView animateWithDuration:0.25 animations:^{
self.navigationController.view.frame = destination;
} completion:^(BOOL finished) {
self.view.userInteractionEnabled = !(destination.origin.x > 0);
}];
}
That's the general idea. You may have to change the code to reflect your view hierarchy, etc.
