很簡(jiǎn)單，應(yīng)該可以看懂吧
private var engine: AVAudioEngine?
extension PithyisCool {
? ? private func startEarReturn() {
? ? ? ? engine = AVAudioEngine()
? ? ? ? guard let engine = engine else { return }
? ? ? ? let playNode = AVAudioPlayerNode()
? ? ? ? engine.attach(playNode)
? ? ? ? let input = engine.inputNode
? ? ? ? let output = engine.outputNode
? ? ? ? engine.connect(input,to: output,format: input.inputFormat(forBus: 0))
? ? ? ? engine.prepare()
? ? ? ? do {
? ? ? ? ? ? try engine.start()
? ? ? ? } catch {
? ? ? ? }
? ? }
? ? private func stopEarReturn() {
? ? ? ? engine?.stop()
? ? ? ? engine?.inputNode.removeTap(onBus: 0)
? ? ? ? engine = nil
? ? }
}
