Instance Property

commonKey

The common key of the metadata item.

Declaration

@property(nonatomic, readonly, copy) AVMetadataKey commonKey;

Discussion

This property contains the key that most closely corresponds to the key in the key property but that belongs to the common key space (AVMetadataKeySpaceCommon) as opposed to a format-specific key space. You can use this key to locate metadata items irrespective of the underlying media format.

If the value of the keySpace property is AVMetadataKeySpaceCommon, this property contains the same key as the key property.

See Also

Getting Keys and Key Spaces

key

The key of the metadata item.

keySpace

The key space for the metadata item’s key.

AVMetadataKeySpace

A value that defines a metadata key space.

AVMetadataKey

A value that specifies a type of metadata