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iPhone: how to test if UIApplicationExitsOnSuspend is working?

Answer 1

+3 A:

One difference I have found to test this is using the iPhone 4 Simulator or Device connected to the Xcode debugger. If you have it enabled properly, when you hit the home button it will exit the debugger. If "multitasking" is enabled, when you hit the home button, the debugger will not exit - touching your icon and bringing it back will continue with your debugging session.

Eric 2010-07-06 16:32:49

hm... I'm using Device "iPhone 4" but debugger is ALWAYS exited, no matter how I configured the property. Base SDK "iPhone Simulator 4.0" and "iPhone OS Deployment Target" "Compiler Default" (there is no version 4, the highest is 3.2). Am I missing something?

swalkner 2010-07-06 16:40:37

Something doesn't sound right - you've got Xcode 3.2.3? I set my Base SDK to "iPhone Device 4.0" and the "iPhone OS Deployment Target" to "iPhone OS 3.1". Where is there no "version 4"?

Eric 2010-07-06 17:00:06

I also set Base SDK to "iPhone Device 4.0" and "iPhone OS Deployment Target" to "iPhone OS 3.1". In my simulator, I always get "Debugger stopped. Program exited with status value:0." when clicking on the home button... "UIApplicationExitsOnSuspend" with boolean type, checkbox selected.

swalkner 2010-07-06 17:04:57

If you are using the iPhone 4 simulator and you uncheck this box it should "suspend" (if not, try removing the property entirely and/or cleaning all targets and rebuilding). If you're using the iPhone 3.2 simulator, it will always exit as this property is iOS 4 only.

Eric 2010-07-06 17:09:59

I just don't get it... my "UIApplicationExitsOnSuspend" is completely ignored... when I ask for "[device respondsToSelector:@selector(isMultitaskingSupported)]" => on Simulator 4.0 it's always true, on 3.2 it's always false. But I really need to be sure that multitasking is turned off... I don't know if I can trust the plist-parameter, when I cant test it without 3GS :(

swalkner 2010-07-06 18:46:58

I think that is to be expected; iOS 4 will always respond true, 3.2 false. The behavior on "exit" is what changes based on the property setting. I wish I could help more - for me, setting the UIApplicationExitsOnSuspend property to YES exits the debugger, removing the property does not. The only time it didn't work was when I had a typo - UIApplicationExistsOnSuspend... :)

Eric 2010-07-06 20:40:49

can you give me one more hint? did you configure something different than I did - comparing my configuration above? thanks a lot, really...

swalkner 2010-07-06 21:10:43

Settings look generally the same, I'm not using libxml, but that won't matter. Changing the Active Executable to "YourApp - iPhone Simulator 4.0" should follow the Info.plist property value. Try doing a "clean all targets" and then compiling+running from scratch. Not sure what else to try.

Eric 2010-07-06 23:05:42

Answer 2

A:

The key UIApplicationExitsOnSuspend works fine only on device iPhone 4. It doesn't work on iPhone 3GS even if you installed iOS4 and have multitasking. That's what our tests show.

2010-08-12 17:44:42

Answer 3

A:

http://www.drobnik.com/touch/2010/07/understanding-ios-4-backgrounding-and-delegate-messaging/

A must read for that problem with a FLowChart what happens when on iOS4

festival 2010-09-06 14:08:13

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iPhone: how to test if UIApplicationExitsOnSuspend is working?

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