IOS Xcode: compiler error, access to Ivar in Objective-C

Question

I work in a large existing objective-c codebase, currently writing unit tests. The project makes extensive use of instance variables.

I wrote a small method to grab ivar for something. It worked in another unit test in the same project, but does not work in this case.

the code:

-(id)getObjectForIvarNamed:(NSString *)ivarNameString
 {
    const char *ivarName = [ivarNameString UTF8String];

    Ivar ivarValue = class_getInstanceVariable([textFieldOverlay class], ivarName);
    id objectAtIvar = object_getIvar(textFieldOverlay, ivarValue);

    return objectAtIvar;
}

The compiler complains about a line starting Ivar ivarValuewith the following error:

"Declaration of 'Ivar' must be imported from module 'ObjectiveC.runtime' before it is required"

A web search for this error code has zero images. Not sure why it works in another file, all the headers look the same between the two classes XCUnitTest.

Answer 1

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