How to use a CIFilter on the layerClass instance of an UIView?

Question

My UIView is using an instance of TBPaperLayer for its layer.

+(Class)layerClass {
    return [TBPaperLayer class];
}

I would like to create a CIFilter to modify the appearance of this layer - especially apply a blur filter on it. How can I use this code to blur a part of this layer ? (code from: Blur CALayer's Superlayer)

CALayer *blurLayer = [CALayer layer];
CIFilter *blur = [CIFilter filterWithName:@"CIGaussianBlur"];
[blur setDefaults];
blurLayer.backgroundFilters = [NSArray arrayWithObject:blur];
[self.superlayer addSublayer:blurLayer];

There is no superlayer during -init.

Answer 1

This is not possible on iOS. From the CALayer class reference:

Special Considerations

This property is not supported on layers in iOS.

Presumably Apple don't feel that the current generation of iOS hardware is powerful enough to support live image filtering.