UIAlertController presentation delay
| Originator: | Tomusm | ||
| Number: | rdar://19285091 | Date Originated: | 12/17/2014 |
| Status: | Open | Resolved: | |
| Product: | iOS SDK | Product Version: | 8.1.2 |
| Classification: | Reproducible: | Always |
Summary:
The presentation of UIAlertController is delayed if done repeatedly from tableView:didSelectRowAtIndexPath. The issue is not reproducible if the UIAlertController is presented by an action triggered by a UIButton.
Steps to Reproduce:
1 - Build and Run the sample project
2 - Tap on the first row of the tableView
3 - Dismiss the UIAlertController
4 - Repeat step 2 and 3 many times
Expected Results:
The UIAlertController should present fast
Actual Results:
The presentation is delayed after the first UIAlertController presentation.
Version:
iOS 8.0.2 & iOS 8.1.2
Notes:
As a workaround I use a dispatch_async(dispatch_get_main_queue(), ^{}); around the presentation code.
Sample project here: https://github.com/Tomusm/bugUIAlertController
Configuration:
iPad Air wifi 16 Go
Comments
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continued issues as of iOS version 9.2 same workaround still works
The situation is amplified if retaining the UIAlertController and attempting to re-present it. First presentation works as it should, and immediately. Use completion block of UIAlertAction to dismiss UIAlertController. Try presenting UIAlertController again, only with a changed title and/or message. Screen grays out and locks up, nothing is ever presented.
workaround does not work in this situation.