It is not possible to dismiss a controller and present another within the same runloop.

Originator:steipete
Number:rdar://19045528 Date Originated:20-Nov-2014 06:10 PM
Status:Open Resolved:
Product:iOS Product Version:iOS 8.1.1
Classification:Serious Bug Reproducible:Always
 
Summary:
It is not possible to dismiss a controller and present another within the same runloop. This seems like an arbitrary restriction which is especially problematic with the transition to UIViewController-based alert views.

Steps to Reproduce:
Open the attached example, click on the button inside the popover, then check the log.

Expected Results:
Should show an alert view displaying “Will never be displayed”. But doesn’t happen.

Actual Results:
Shows another alert after some time explaining the bug.

Regression:
This worked with UIAlertView.

Notes:
Using a dispatch_async on the main thread would fix the issue, but this is code smell.

Comments

Example: http://cl.ly/143o2r2N3Y42/download/ViewControllerDismissalWarning%20(rdar%3A%3A19045528).zip

By steipete at Nov. 20, 2014, 6:14 p.m. (reply...)

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