Tagging CALayers in iPhone

Question

I am looking for a general way to be able to search for a unique CALayer in a hierarchy without having to remember where the layer is in a hierarchy (and use the sublayer: and superlayer: methods).

I know this is possible with UIViews (which makes flipping views easy) but is it possible for CALayer?

thank you in advance for your help

Peyman

Answer 1

You can also use the name property of the CALayer.

[layer setName:@"myKey"]; 

To look it up,

- (CALayer *)myLayer {      for (CALayer *layer in [superLayerOfMyLayer sublayers]) {              if ([[layer name] isEqualToString:LabelLayerName]) {                 return layer;             }     }      return nil; } 

Answer 2

Apologize. I was being a dunce. CALayer is a key-value coding compliant container so I can create arbitrary values (including tags) in any instance. To create a tag for instance we do:

[rootLayer setValue:[NSNumber numberWithInt:101] forKey:@"PFtag"]; 

thank you