Ok, I figured it out. I wasn't getting the VNDectectBarcodesRequest involved. This fixed it.
VNRequest *vnRequest = [[VNDetectBarcodesRequest new] initWithCompletionHandler:^(VNRequest * _Nonnull request, NSError * _Nullable error) {
NSLog(@"vnRequest called %@, %@, error=%@",request, request.results, error);
}];
Topic:
Programming Languages
SubTopic:
General
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