如何在Swift中传递C回调？考虑这个例子:classAudioQueue{vardesc:AudioStreamBasicDescriptionvarqueue:AudioQueue?funcaudioQueueHandleBuffer(ctx:UnsafeMutablePointer,inAQ:AudioQueue!,inBuffer:AudioQueueBufferRef){//dostuff}funcinitialize(){//thisdoesnotwork!varerr=AudioQueueNewOutput(&desc,audioQueueHandleBuffer,nil

如何在Swift中传递C回调？考虑这个例子:classAudioQueue{vardesc:AudioStreamBasicDescriptionvarqueue:AudioQueue?funcaudioQueueHandleBuffer(ctx:UnsafeMutablePointer,inAQ:AudioQueue!,inBuffer:AudioQueueBufferRef){//dostuff}funcinitialize(){//thisdoesnotwork!varerr=AudioQueueNewOutput(&desc,audioQueueHandleBuffer,nil