Instance Property


The common key of the metadata item.


var commonKey: AVMetadataKey? { get }


This property contains the key that most closely corresponds to the key in the key property but that belongs to the common key space (common) 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 common, this property contains the same key as the key property.

See Also

Getting Keys and Key Spaces

var key: (NSCopying & NSObjectProtocol)?

The key of the metadata item.

var keySpace: AVMetadataKeySpace?

The key space for the metadata item’s key.

struct AVMetadataKeySpace

A value that defines a metadata key space.

struct AVMetadataKey

A value that specifies a type of metadata