'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!
Solution 1:[1]
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() }
Solution 2:[2]
Swift 3.0 & Swift 4.0
Set the sublayers property to nil to remove all sublayers from a view.
view.layer.sublayers = nil
also you can add
.removeAll()
Solution 3:[3]
This worked for me and fixed the crash:
[self.view.layer.sublayers makeObjectsPerformSelector:@selector(removeFromSuperlayer)]
I changed the view with my image UImageview, and the crash is gone.
Solution 4:[4]
Swift 2.0:
for layer: CALayer in self.view.layer.sublayers! {
layer.removeFromSuperlayer()
}
or
self.view.layer.performSelector("removeFromSuperlayer")
Solution 5:[5]
Swift 5:
You can either remove the layer itself or iterate through them and do the following:
layer.removeAllAnimations()
layer.removeFromSuperlayer()
Solution 6:[6]
For swift5 to remove CAShapeLayer from added view
guard let sublayers = self.view.layer.sublayers else { return }
for sublayer in sublayers where sublayer.isKind(of: CAShapeLayer.self) {
sublayer.removeFromSuperlayer()
}
Solution 7:[7]
Swift 4.1
self.view.layer.sublayers?.removeAll()
or if in a UIView sub-class just
layer.sublayers?.removeAll()
Solution 8:[8]
If you want to delete all sublayers and add a new one, you can easily do:
rootLayer.sublayers = [layer1] // adding one layer
rootLayer.sublayers = [layer1, layer2, ...] // adding two or more layers
This could be helpful, if you work with tableview or collectionview cells. You don't need to call prepareForReuse for removing the sublayers.
Solution 9:[9]
Simple one liner in SWIFT 4.
self.view.layer.sublayers.removeAll()
Sources
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Source: Stack Overflow