Urban Airship crashes when calling takeoff

Question

Upgrading to UrbanAirship 3.0.0 with Xcode 5.0, I'm getting an error when calling this code:

[UAirship takeOff:config];

The error is

+[NSJSONSerialization stringWithObject:]: unrecognized selector sent to class 0x3b2ca9fc
2013-09-19 15:02:31.981 [178:60b] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[NSJSONSerialization stringWithObject:]: unrecognized selector sent to class 0x3b2ca9fc'

This doesn't seem to appear when setting the key "inProduction" to "YES" in the AirshipConfig.plist, which makes sense as calling takeOff: populates the instance of UAirShip. It seems to be due to the category NSJSONSerialization+UAAdditions.

Any help on this one? Thanks

I'm setting a default config `UAConfig *config = [UAConfig defaultConfig];` — Jason LAPIERRE, Sep 19 '13 at 16:32
Just posted my solution which seems to work fine. Ask me if you have any problem regarding how I've done it. — Jason LAPIERRE, Sep 20 '13 at 17:04

ralepinski · Accepted Answer · 2013-09-20T18:55:39.950

16

To fix this issue, you must include "-ObjC" flag in "Other Linker Flags" found in your projects build settings.

UAirship library 3.x now makes use of Objective-C categories so this flag must be set to avoid the runtime exception.

Details on the issue can be found here:

https://developer.apple.com/library/mac/qa/qa1490/_index.html

Updated the docs:

http://docs.urbanairship.com/build/ios.html#build-settings http://docs.urbanairship.com/topic_guides/ios_migration.html#linker-flags

edited Sep 20 '13 at 18:55

answered Sep 20 '13 at 17:27

ralepinski

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Awesome, had this upgrading to 5.0.3 in XCode 6, worked fine one day and then the next it was crashing... very strange but adding the linker flag worked! – CMash Mar 25 '15 at 16:35

score 0 · Answer 2 · answered Sep 19 '13 at 18:09

0

Doesn't seam to be happening with the source: https://github.com/urbanairship/ios-library

answered Sep 19 '13 at 18:09

OscarVGG

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I'm using the source and carefully followed the UrbanAirship's tutorial found here http://docs.urbanairship.com/build/ios.html but it doesn't solve the problem – Jason LAPIERRE Sep 20 '13 at 09:12

score 0 · Answer 3 · answered Sep 20 '13 at 06:41

0

You must have included both the libraries:

libUAirship-3.0.0.a
libUAirship-iOS5-3.0.0.a

You have to use either of the library for respective iOS

answered Sep 20 '13 at 06:41

Akki

1

Actually, I've only added the library `libUAirship-iOS5-3.0.0` I'm running my app with iOS Deployment Target - iOS 5.0 and Base SDK is iOS 7.0 – Jason LAPIERRE Sep 20 '13 at 09:20

score 0 · Answer 4 · answered Sep 20 '13 at 12:06

After looking at different solutions, it turns out that this fixes the issue:

• Download sources from https://github.com/urbanairship/ios-library directly into your App folder (don't take .zip given on their website)

• Drag & drop the Airship folder in your Project (do not use the AirshipLib one)

• Don't link any of the libUAirship-3.0.0.a or libUAirship-iOS5-3.0.0.a

• Boom. It's working.

Hope it'll help some others out there looking to fix this for ages.

score 0 · Answer 5 · answered Jul 10 '14 at 00:42

Just to add, my problem was that I added -ObjC flag to the project, and it should be added to the target settings.

Also, if that does not compile, there is another option

-Wl,-force_load,<PathToYourLib>/libUAirship-4.0.0.a

Also should be added to the target. Fill the real path to your lib instead of <PathToYourLib>.

Urban Airship crashes when calling takeoff

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