An array of strings identifying the types of metadata objects to process.
- iOS 6.0+
- Mac Catalyst 13.0+
This property is used to filter the metadata objects reported by the receiver. Only metadata objects whose type matches one of the strings in this property are forwarded to the delegate’s
metadata method for processing.
The default is an empty
NSArray object, and as a result, no metadata objects are forwarded to the delegate’s
metadata method. The same result can be achieved by setting the property to
nil. This default behavior maximizes both performance and battery life.