Custom variable 'layer' used before being initialized

Question

I would like to create a custom CALayer to set items corner radius.

func getLayerCorner(radius:CGFloat) -> CALayer
{
    let layer:CALayer
    layer.cornerRadius = radius
    layer.masksToBounds = true

    return layer
}

I'm getting Variable 'layer' used before being initialized

I'm still learning Swift and not sure how to init it.

Answer 1

The error exactly states what is wrong with your code. You need to initialise the layer before using:

func getLayerCorner(radius:CGFloat) -> CALayer
{
    let layer           = CALayer()
    layer.cornerRadius  = radius
    layer.masksToBounds = true
    return layer
}