UIView group opacity in single view heirachy

Question

I am writing a UI library in which i would like to be able to have the alpha of the UIViews as if the UIViewGroupOpacity info.plist ket was set. See following links:

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Answer 1

Yes there is, you can set shouldRasterize of the view's layer.

containerView.layer.shouldRasterize = YES;
// Not setting rasterizationScale, will cause blurry images on retina displays:
containerView.layer.rasterizationScale = [[UIScreen mainScreen] scale];

This will have the same effect as UIViewGroupOpacity but only for containerView and it's subviews.