ios - AVCaptureVideoPreviewLayer Change to AspectFill -


i session shown in aspectfill way inside avcampreviewlayer. while code below that, fills full screen not view preview layer hooked on storyboard. in way fill avcapturevideopreviewlayer bounds of previewview not full screen when changing gravity.

  [(avcapturevideopreviewlayer *)[[self previewview] layer] setvideogravity:avlayervideogravityresizeaspectfill];

i have tried 

- (void)setsession:(avcapturesession *)session {     ((avplayerlayer *)[self layer]).videogravity = avlayervideogravityresizeaspectfill;     ((avplayerlayer *)[self layer]).bounds = ((avplayerlayer *)[self layer]).bounds;     [(avcapturevideopreviewlayer *)[self layer] setsession:session]; }

** note come apple docs


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