Preview Layer Orientation - iOS

I have a preview layer which shows the camera preview, using AVFoundation. Now I want to start my app such that everything is in landscape mode. How do I do that for the preview layer?

setorientation: method is deprecated for iOS 6 so I don't want to use that.

The setVideoOrientation method of AVCaptureConnection changes the actual way the images are captured but the preview orientation still remains the same.

Copyright Notice：Content Author:「neeraj」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/13081080/preview-layer-orientation-ios

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