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Doing animation in core animation after adding layer to superlayer
// create sublayer
sublayer.position = p1;
[superlayer addSublayer:sublayer];
sublayer.position = p2;

{
    ...
    sublayer.position = p1;
    [superlayer addSublayer:sublayer];
    [self performSelector:@selector(changePosition:)
                    delay:0
               withObject:sublayer];
    ...
}

-(void)changePosition:(CALayer*)layer
{
    layer.position = p2;
}