Auto Layout constraint on CALayer IOS

the whole autoresizing business is view-specific. layers don’t autoresize.

what you have to do — in code — is to resize the layer yourself

e.g.

in a viewController you would do

- (void) viewDidLayoutSubviews {
  [super viewDidLayoutSubviews]; //if you want superclass's behaviour... 
  // resize your layers based on the view's new frame
  self.editViewBorderLayer.frame = self.editView.bounds;
}

or in a custom UIView you could use

- (void)layoutSubviews {
  [super layoutSubviews]; //if you want superclass's behaviour...  (and lay outing of children)
  // resize your layers based on the view's new frame
  layer.frame = self.bounds;
}