iOS Question Audio player for local streams

Sub CreatePlayer(url As String) As NativeObject
   Dim u As NativeObject
   u = u.Initialize("NSURL").RunMethod("URLWithString:", Array(url))
   Dim player As NativeObject
   player = player.Initialize("AVPlayer").RunMethod("alloc", Null) _
     .RunMethod("initWithURL:", Array(u))
   Return player
End Sub

#if OBJC
@import CoreMedia;
@import AVFoundation;
- (double)GetTime:(AVPlayer*)player {
   return CMTimeGetSeconds([player.currentItem currentTime]);
}
- (float)GetDuration:(AVPlayer*)player {
    Float64 duration = CMTimeGetSeconds(player.currentItem.duration);
    return duration;
}
- (void)seekto:(AVPlayer*)player :(float)pos{
    Float64 seconds = pos;
    CMTime targetTime = CMTimeMakeWithSeconds(seconds, NSEC_PER_SEC);
    [player seekToTime:targetTime
 toleranceBefore:kCMTimeZero toleranceAfter:kCMTimeZero];
}
#End If