Beppino66 Beppino66 - 6 months ago 147
iOS Question

remove all subLayers from a view

In an animation I added a lot of sublayers to a view, with:

[self.view.layer addSublayer:layer1];
[self.view.layer addSublayer:layer2];


....

I would like to remove all sublayers with an action.
I already tried with this suggestion of a similar question:

rootLayer.sublayers = nil;


but it doesn't work...

Could you help me?
Than you!

Answer

The sublayers property of a CALayer object returns a copy of the array. Setting it no nil does nothing about the sublayers. This however will do:

for (CALayer *layer in self.view.layer.sublayers) {
    [layer removeFromSuperlayer];
}

Or, in Swift

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