'How to antialiasing with UIVisualEffectView in swift?

I made an Blur View. And that rotated. Then pixel broken.

like this enter image description here

This is my code.

extension UIView {
    func addBlur() {
        let effect = UIBlurEffect(style: .regular)
        let effectView = UIVisualEffectView(effect: effect)
        effectView.frame = bounds
        effectView.layer.allowsEdgeAntialiasing = true
        effectView.layer.masksToBounds = true
        effectView.layer.allowsEdgeAntialiasing = true
        
        insertSubview(effectView, at: 0)
        backgroundColor = .clear
        layer.allowsEdgeAntialiasing = true
        layer.masksToBounds = true
    }
    
    func rotate(angle: CGFloat) {
        let radians = angle / 180.0 * CGFloat.pi
        let rotation = transform.rotated(by: radians)
        transform = rotation
    }
}

How can I fix it?

uiviewuivisualeffectviewuiblureffect


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