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I haven’t had any problems using UIKit classes until I tried to use a UIPopoverController, now I get the linker error:
Undefined symbols:
"_OBJC_CLASS_$_UIPopoverController", referenced from:
__objc_classrefs__DATA@0 in Tweak.xm.c4a09c77.o
ld: symbol(s) not found
I’ve made sure I have UIKit in my make file so I’m not sure what the problem is.
The issue is most certainly that you have a version of the development sysroot that doesn’t yet have
UIPopoverController(i. e. it’s older than the iOS 3.2 SDK). Change to a newer version of development sysroot. The latest available is 6.1.