AVCaptureVideoPreviewLayer doesn't fill up whole iPhone 4S Screen

Question

AVCaptureVideoPreviewLayer *avLayer = 
                [AVCaptureVideoPreviewLayer layerWithSession:session];
avLayer.frame = self.view.frame;
[self.view.layer addSublayer:avLayer];

I use AVCaptureVideoPreviewLayer to display video on the view. But the video's view didn't fill up the full iPhone4's screen.(two grey bar at the right&left side)

I want the video fills up full screen. How can I deal with it? Thank you very much!

Answer 1

Maybe this solves it?

CGRect bounds=view.layer.bounds;
avLayer.videoGravity = AVLayerVideoGravityResizeAspectFill;
avLayer.bounds=bounds;
avLayer.position=CGPointMake(CGRectGetMidX(bounds), CGRectGetMidY(bounds));