generateSignature(from:completionHandler:)

Creates a signature with the asset you specify.

Declaration

class func generateSignature(from asset: AVAsset, completionHandler: @escaping  @Sendable (SHSignature?, (any Error)?) -> Void)

class func signature(from asset: AVAsset) async throws -> SHSignature

Parameters

asset:
An asset that contains the audio to convert.
completionHandler:
The system calls this completion block after creating the signature, or an error if the system couldn’t create it.
This block takes the following parameters:
signature
A new signature instance.
error
An error object if a problem occurs when creating thesignature; otherwise, nil.

Discussion

important:

You can call this method from synchronous code using a completion handler, as shown on this page, or you can call it as an asynchronous method that has the following declaration:

class func signature(from asset: AVAsset) async throws -> SHSignature

For information about concurrency and asynchronous code in Swift, see Calling Objective-C APIs Asynchronously.

The asset you specify can be any type of media that contains audio tracks. If the asset has multiple tracks, the system mixes them into one SHSignature.