ios - AudioKit 后台音频电池使用

Question

我刚从 AVAudio 切换到 AudioKit。为了让一切正常运行，我必须启用背景音频，从那时起电池使用情况就很糟糕。

一旦序列或播放器开始和结束，清理和退出背景音频的最佳方法是什么？

如有任何帮助，我们将不胜感激。

Answer 1

在您的应用委托(delegate)中:

func applicationDidEnterBackground(_ application: UIApplication) {
    conductor.checkIAAConnectionsEnterBackground()
}

func applicationWillEnterForeground(_ application: UIApplication) {
    conductor.checkIAAConnectionsEnterForeground()
}

在您的音频引擎或导体中(根据其他 AudioKit 示例)执行:

var iaaTimer: Timer = Timer()

func checkIAAConnectionsEnterBackground() {

    if let audiobusClient = Audiobus.client {

        if !audiobusClient.isConnected && !audiobusClient.isConnectedToInput {
            deactivateSession()
            AKLog("disconnected without timer")
        } else {
            iaaTimer.invalidate()
            iaaTimer = Timer.scheduledTimer(timeInterval: 20 * 60,
                                            target: self,
                                            selector: #selector(self.handleConnectionTimer),
                                            userInfo: nil, repeats: true)
        }
    }
}

func checkIAAConnectionsEnterForeground() {
    iaaTimer.invalidate()
    startEngine()
}

func deactivateSession() {

    stopEngine()

    do {
        try AKSettings.session.setActive(false)
    } catch let error as NSError {
        AKLog("error setting session: " + error.description)
    }

    iaaTimer.invalidate()

    AKLog("disconnected with timer")
}

@objc func handleConnectionTimer() {
    AKLog("should disconnect with timer")
    deactivateSession()
}