如果你想使用iOS11+,你可以使用AudioKit的渲染到文件:
/// Render output to an AVAudioFile for a duration.
/// - Parameters
/// - audioFile: An file initialized for writing
/// - seconds: Duration to render
/// - prerender: A closure called before rendering starts, use this to start players, set initial parameters, etc...
///
@available(iOS 11.0, macOS 10.13, tvOS 11.0, *)
public func renderToFile(_ audioFile: AVAudioFile, seconds: Double, prerender: (() -> Void)? = nil) throws {
如果您需要支持 iOS9+,请使用 AKOfflineRenderNode 的渲染到 URL 功能:
@available(iOS,已废弃:11)
@可用(tvOS,已废弃:11)
@available(macOS,已废弃:10.13)
开放类 AKOfflineRenderNode:AKNode、AKComponent、AKInput {
public typealias AKAudioUnitType = AKOfflineRenderAudioUnit
public static let ComponentDescription = AudioComponentDescription(effect: "mnrn")
private var internalAU: AKAudioUnitType?
open var internalRenderEnabled: Bool {
get { return internalAU!.internalRenderEnabled }
set { internalAU!.internalRenderEnabled = newValue }
}
open func renderToURL(_ url: URL, seconds: Double, settings: [String: Any]? = nil) throws {
return try internalAU!.render(toFile: url, seconds: seconds, settings: settings)
}