Setting Corner Radius in Draw for UIImageView - swift

Question

I am setting some properties in the draw method of my UIImageView. However, these do not seem to be taking any affect at all. I see no rounded corners and no masking taking affect. The view is below:
//
// RoundImage.swift
//
//
import UIKit
class RoundImage: UIImageView {
//------------------
//MARK: - Setup and Initialization
//------------------
override init(frame: CGRect) {
super.init(frame: frame)
self.initialize()
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
self.initialize()
}
override func draw(_ rect: CGRect) {
super.draw(rect)
self.layer.cornerRadius = 30
self.layer.masksToBounds = true
self.clipsToBounds = true
}
//Setups content, styles, and defaults for the view
private func initialize(){
self.initStyle()
}
//Sets static content for the view
private func staticContent() {
}
//Styles the view's colors, borders, etc at initialization
private func initStyle(){
}
//Styles the view for variables that must be set at runtime
private func runtimeStyle(){
//TODO: These values cannot be changed in interface builder, but they should be able to be
}
//------------------
//MARK: - Interface Builder Methods
//------------------
//Sets the view up for interface builder with runtime styling and temp display values
override func prepareForInterfaceBuilder() {
self.runtimeStyle()
self.staticContent()
}
//------------------
//MARK: - Lifecycle Methods
//------------------
//Sets the view up with runtime styling and values
override func awakeFromNib() {
super.awakeFromNib()
self.runtimeStyle()
self.staticContent()
}
}

Answer 1

UIImageView when subclassed does not call the draw method at all. It is not allowed, although minimally documented. In this case, it is recommended to subclass UIView and then draw the image on the view in your draw method yourself.
For further information:
drawRect not being called in my subclass of UIImageView