Why can’t UIImagePickerController be pushed into navigation stack?

Question

When using pushViewController to push UIImagePickerController:

[self.navigationController pushViewController:pvc animated:YES];

an error will occur such as:

Pushing a navigation controller is not supported

The right solution is to use presentModalViewController:

[self presentModalViewController:pvc animated:YES];

Can someone explain why this is necessary? What‘s hidden in UIViewController?

Thanks!

score 17 · Accepted Answer · answered Jan 28 '11 at 14:04

17

Apple does not allow stacking of navigation bars. Since the image picker has its own navigation bar, it cannot be placed in a navigation stack. The result would cause user confusion since there would be two bars, two sets of navigation items, two titles, etc.

answered Jan 28 '11 at 14:04

taintedzodiac

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3

but it is possible to hide one of the bars, using the `navigationBarHidden` property – user102008 Oct 18 '11 at 03:07
3

Exactly, what if we want to use the UIImagePickerViewController with [picker setSourceType:UIImagePickerControllerSourceTypeCamera]; – David van Dugteren Jun 26 '12 at 23:28

Why can’t UIImagePickerController be pushed into navigation stack?

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