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Editorial Team
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Asked: 2026-06-02T23:29:05+00:00

I present a modal table view within a navigation view with a Back button.

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I present a modal table view within a navigation view with a Back button. The back button sends a message to the modal view’s delegate to dismiss the modal view. If I scroll the table view and then tap the Back button on the navigation bar while the table view is still scrolling, the app crashes with this message:

*** -[UILayoutContainerView setUseFastMode:]: message sent to deallocated instance 0xef74650

When I PO 0xef74650 I get this:

(int) $1 = 251086416 [no Objective-C description available]

Anyone experience this before? What is the workaround or fix?

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1 Answer

  1. Editorial Team

    I believe this is a bug in iOS 5.1 that occurs when animating the dismissing of a modal that is currently scrolling. I was getting reports from users that my app was crashing, and when I investigated I had the same error.

    I created a new project with the minimal amount of code/views and was able to reproduce this crash. The only workaround I’ve found so far is to disable animation when dismissing a modal. I’ve submitted a bug report to Apple.

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