无法为AVAudioSession设置类别

Question

Trying to record audio with AVAudioSession . But not able to set category end up with ambiguous without context error.

I'm using swift 4.

@objc func setupRecorder() {
    recordingSession = AVAudioSession.sharedInstance()

    do {
        try recordingSession?.setCategory(.playAndRecord, mode: .default)
        try recordingSession.setActive(true)
        recordingSession.requestRecordPermission() { [unowned self] allowed in
            DispatchQueue.main.async {
                if allowed {
                    self.startRecording()
                } else {
                    // failed to record!
                }
            }
        }
    } catch {
        // failed to record!
    }
}

Answer 1

If you are using "Swift4", then the method to set category is different, ie,

AVAudioSession.sharedInstance().setCategory(String, mode: String, options: AVAudioSessionCategoryOptions)

ad you can use this via following way:

try? AVAudioSession.sharedInstance().setCategory(AVAudioSessionCategoryPlayAndRecord, mode: AVAudioSessionModeDefault, options: AVAudioSessionPortBuiltInSpeaker)