ios - Undefined symbols for architecture x86_64: "_OBJC_CLASS_$_ToDoItem" -


i'm trying xcode tutorial on ios todoapp. i've done steps , i've got compile errors.

i've searched around , i've seen i'm not 1 problem, , have tried peoples solutions no success. error message:

undefined symbols architecture x86_64:   "_objc_class_$_todoitem", referenced from:       objc-class-ref in todolisttableviewcontroller.o ld: symbol(s) not found architecture x86_64 clang: error: linker command failed exit code 1 (use -v see invocation)

it seems missing todoitem.m (or better said @implementation todoitem) in project. either it's not there @ or file not included in build target.

try search @implementation todoitem in project. if it's missing, have add it. if it's not missing, make sure file added target trying build.


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