Removing all CALayer's sublayers

Question

I have trouble with deleting all of layer\'s sublayers. I currently do this manually, but that brings unnecessary clutter. I found many topics about this in google, but no a

Answer 1

Swift (short version):

layer.sublayers?.forEach { $0.removeFromSuperlayer() }

Answer 2

For sure you can do:
self.layer.sublayers=nil;
as suggested by Pascal Bourque. But it's better to call the setter for sublayers property:
[self.layer setSublayers:nil];
To avoid any clean up issues if there might be.

Answer 3

Indiscriminately removing all sublayers causes nasty crashes in iOS 7, which can occur much later in the program's execution. I have tested this thoroughly using both rootLayer.sublayers = nil and [rootLayer.sublayers makeObjectsPerformSelector:@selector(removeFromSuperlayer)]. There must be a system-created layer that's getting messed up.

You have to keep your own array of layers and remove them yourself:

[myArrayOfLayersIAddedMyself makeObjectsPerformSelector:@selector(removeFromSuperlayer)];