Question

I have two UIViewControllers each with their own nib files. Each controller serves a different purpose. The idea was to add a UIScrollController and add both UIViewControllers to it so the user can easily scroll between them both.

Q1) Is this even possible? Or have I got the whole purpose of UIScollControllers incorrect, if so, what is the best alternative.

I have been poking around the internet and the best I can come up with is this:

ScoreViewController *scoreController = [[ScoreViewController alloc] initWithNibName:@"ScoreViewController" bundle:nil];
scoreController.view.frame = CGRectMake(0.0f, 0.0f, 960f, 640f);
[self.scrollview addSubview:scoreController.view];
[scoreController release];

SettingsViewController *settingsController = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController" bundle:nil];
settingsController.view.frame = CGRectMake(0.0f, 0.0f, 960f, 640f);
[self.scrollview addSubview:settingsController.view];
[settingsController release];

This code is entered inside my RootViewController class. It doesn’t seem to work though as I can’t scroll between the two UIViewControllers I have added (score and settings). All what is displayed on the screen is the second controller added – the SettingsViewController.

Q2) Why is this broken?

Thank you. 🙂

Answer 1

Actually you place the first controller correctly, then you put the second above it.

settingsController.view.frame = CGRectMake(0.0f, 0.0f, 960f, 640f);

1. 960×640 – this is not the correct way to enter coordinates (320×480 is the actual size) double size is used only for image files
2. 0.0f, 0.0f means x: 0, y: 0, so in the second controller you need x: 320, y: 0

then, you have to set the contentSize of the scrollView

scrollview.contentSize = CGSizeMake(320*2, 480);

Then enable the paging of the scrollView;

scrollview.pagingEnabled = YES;

And that should work 🙂