Contents

predicate(forChannelCount:operatorType:)

Creates a NSPredicate for audio channel count which can be used with other NSPredicates to express variant preferences.

Declaration

class func predicate(forChannelCount channelCount: Int, operatorType: NSComparisonPredicate.Operator) -> NSPredicate

Parameters

  • channelCount:

    The RHS value for the channel count in the predicate equation.

  • operatorType:

    The valid values are NSLessThanPredicateOperatorType, NSLessThanOrEqualToPredicateOperatorType, NSGreaterThanPredicateOperatorType, NSGreaterThanOrEqualToPredicateOperatorType, NSEqualToPredicateOperatorType and NSNotEqualToPredicateOperatorType.

Discussion

Predicate will be evaluated on the media selection option selected for the asset. Media selection options for primary assets may be specified in the AVAssetDownloadConfiguration mediaSelections property. Media selection options for interstitial assets may be circumscribed by -[AVAssetDownloadConfiguration setInterstitialMediaSelectionCriteria: forMediaCharacteristic:].

See Also

Building predicates