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Today when testing app on iOS 5, I've found a problem, it crashes on starting.

dyld: Symbol not found: _OBJC_CLASS_$_UIActivityViewController Referenced from: /var/mobile/Applications/6F884421-A676-434B-89E0-598F4F8F277F/HGroupware.app/HGroupware Expected in: /System/Library/Frameworks/UIKit.framework/UIKit in /var/mobile/Applications/6F884421-A676-434B-89E0-598F4F8F277F/HGroupware.app/HGroupware

So what should I do? Change deployment target to iOS >= 6.0 or any solution? Please help me.

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    Personally, I think iOS 5 is a very tiny portion of the install base right now, so it shouldn't be worth supporting it... But your mileage may vary. Commented Apr 18, 2014 at 8:48
  • thank you... but my customers are still using iOS 5 ... Commented Apr 18, 2014 at 9:30
  • OK, then you will need to implement an alternative code path for iOS 5 (i.e., use something other that UIActivityViewController; perhaps roll ypur own...) Commented Apr 18, 2014 at 9:44
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    yes, I understand... the problem here is new tapku library. There're some UIActivityViewController was used. I'm trying to remove it. Thank you again :) Commented Apr 18, 2014 at 9:55

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Yes only solution is IOS >=6. Because UIActivityViewController is only available from IOS6. See this apple's doc

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UIActivityViewController is "Available in iOS 6.0 and later.", so ideally, yes, change deployment target. Or change it on something else in code if [UIActivityViewController class] returns nil.

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