iphone - Symbol not found: _OBJC_CLASS_$_UIPopoverController

Question

I am having problems with my universal app. I have set the Base SDK to iPhone 3.2 and set the target to 3.1.

I have moved the files that are using the UIPopoverController to their own files and they shouldn't be loaded when loading the app on the iPhone. Still, when I build my app I get the following error when I build and debug to my device:

dyld: Symbol not found: _OBJC_CLASS_$_UIPopoverController Referenced from: /var/mobile/Applications/B3B90643-92DC-4E5C-8B2F-83A42D6D57E0/citybikes.app/citybikes Expected in: /System/Library/Frameworks/UIKit.framework/UIKit in /var/mobile/Applications/B3B90643-92DC-4E5C-8B2F-83A42D6D57E0/citybikes.app/citybikes

I really hope someone can help me.

Best regards, Paul Peelen

Answer 1

Even if they're not loaded in runtime, those files are still processed in linking. The symbol _OBJC_CLASS_$_UIPopoverController is therefore added into your app as one of those requiring dynamic linking.

There are 2 workarounds,

1. Replace all appearance of UIPopoverController in a message (e.g. [UIPopoverController alloc]) with NSClassFromString(@"UIPopoverController"), or
2. Make UIKit weakly linked.