UIAlertView performSelectorInBackground

Question

on iOS5 I can use method to show UIAlertView:

[alert performSelectorInBackground: @ selector (show) withObject: nil];

on iOS6 crash my app, why?

That the replacing?

Thanks

Any particular error message, crash log? – basvk Dec 07 '12 at 13:01 — basvk, Dec 07 '12 at 13:01

Max · Answer 1 · 2012-12-07T13:12:04.280

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Why are you performing that selector in the background? Showing an alert view probably isn't something you want to be doing on a background thread.

edited Dec 07 '12 at 13:12

answered Dec 07 '12 at 12:58

Max

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performSelector in background runs that selector on a background thread so that it doesn't stop other tasks from performing on the main thread. I don't think it's really what you're looking for here. Just change it to [alert show] – Max Dec 07 '12 at 13:15

score 0 · Answer 2 · answered Dec 07 '12 at 13:24

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You aren't suppose to do UI stuff in the background. It will make your app crash. You normally do stuff like loading data from a server in the background or computational expensive operation, but never do anything that's in the UIKit framework in a background thread.

answered Dec 07 '12 at 13:24

Yuliani Noriega

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on iOS5 don't have this problem, why? – Edi Dec 07 '12 at 14:06

UIAlertView performSelectorInBackground

2 Answers2