Removing all CALayer's sublayers

Question

Hi.

I have trouble with deleting all layer's sublayers. I do this manually, but it's unwanted code clutter. I found many topics about this in google, but no answer.

I tried to do something like this:

for(CALayer *layer in rootLayer.sublayers)
{
    [layer removeFromSublayer];
}

but it didn't work.

Also, i tried to clone rootLayer.sublayers into separate NSArray, but result was the same.

Any ideas?

regards, radex

PS. sorry for my English.

Edit:

I thought it works now, but I was wrong. It works good with CALayers, but it doesn't work with CATextLayers. Any ideas?

Answer 1

The following should work:

for (CALayer *layer in [[rootLayer.sublayers copy] autorelease]) {
    [layer removeFromSuperlayer];
}

Answer 2

How about using reverse enumeration?

NSEnumerator *enumerator = [rootLayer.sublayers reverseObjectEnumerator];
for(CALayer *layer in enumerator) {
    [layer removeFromSuperlayer];
}

Because the group in sublayers are changed during enumeration, if the order is normal. I would like to know the above code's result.

Answer 3

The simplest way to remove all sublayers from a layer is to set the sublayer property to nil:

rootLayer.sublayers = nil;