Question

我仅在iOS 11.2中面临以下代码中的崩溃。我使用的是swift 4.0。我试图调试几个小时来重现崩溃，但无法成功。这是代码

func prepareNewConnection(conn:String) -> RTCPeerConnection {

    let uuid = UIDevice.current.identifierForVendor?.uuidString

    localAudioTrack = peerConnectionFactory.audioTrack(withTrackId: uuid!)

        mediaStream = peerConnectionFactory.mediaStream(withStreamId: LOCAL_MEDIA_STREAM_ID)
        if(localAudioTrack != nil && mediaStream != nil)
        {
            mediaStream.addAudioTrack(localAudioTrack!) //Crash on this line
        }

    let pc = peerConnectionFactory.peerConnection(with: rtcConfig, constraints: mediaConstraints, delegate: self)
    if(mediaStream != nil)
    {
        pc.add(mediaStream)
    }

return pc;
}

以下是崩解报告。

https://www.playframework.com/documentation/2.6.x/ScalaAsync#Creating-non-blocking-actions

我将非常感谢任何帮助。

Answer 1

请避免安全展开，如果让..

 func prepareNewConnection(conn:String) -> RTCPeerConnection {

   if let uuid = UIDevice.current.identifierForVendor?.uuidString {
localAudioTrack = peerConnectionFactory.audioTrack(withTrackId: uuid) //removed safely Unwrapping
    mediaStream = peerConnectionFactory.mediaStream(withStreamId: LOCAL_MEDIA_STREAM_ID)
 let pc = peerConnectionFactory.peerConnection(with: rtcConfig,constraints: mediaConstraints, delegate: self)
    if(localAudioTrack != nil && mediaStream != nil)
    {
        mediaStream.addAudioTrack(localAudioTrack)
        pc.add(mediaStream) 
    }
  }
 return pc
}

EXC_BAD_ACCESS KERN_INVALID_ADDRESS ios 11.2 swift 4.0

1 个答案: