AVFoundation Metadata Object Types

Question

I\'m trying to use the AVFoundation to read barcodes with the below code, but I keep getting the error below. Help as to why would be much appreciated. Thanks in advance!

Answer 1

This is one of those rare cases where the error message is very useful.

Call [output availableMetadataObjectTypes] and make sure what you're trying to set is in there. If not, then don't try to set that value.