Background Colour in UIView not showing - ios

Question

I have a UIView that should show two colours, red and orange, based on the value of rating: Double The problem is that when I run the app nothing is showing up. In my output log the function prints that it has run and that the rating value is what it should be. So I am not sure why nothing is showing up when I run the app, I just see white.
class RatingViewController: UIView {
var rating: Double = 1.0
var rate: Double? {
didSet {
rating = rate!
setUpView()
}
}
override init(frame: CGRect) {
super.init(frame: frame)
}
required init?(coder: NSCoder) {
super.init(coder: coder)
}
private func setUpView() {
Self.backgroundcolor = UIColor.yellow
print("rating is \(rating), and width is \((UIScreen.main.bounds.width * CGFloat(rating/10)))")
let width = (UIScreen.main.bounds.width * CGFloat(rating/10))
var view: UIView
view = UIView(frame: CGRect(x: 0, y: 0, width: width, height: self.frame.size.height))
view.backgroundColor = UIColor.red
self.addSubview(view)
}
}

Answer 1

You have to add setUpView in init(: method
class RatingViewController: UIView {
var rating: Double = 1.0
required init?(coder: NSCoder) {
super.init(coder: coder)
}
init(frame: CGRect, rate: Double) {
super.init(frame: frame)
self.rating = rate
setUpView()
}
private func setUpView() {
self.backgroundColor = UIColor.yellow
print("rating is \(rating), and width is \((UIScreen.main.bounds.width * CGFloat(rating/10)))")
let width = (UIScreen.main.bounds.width * CGFloat(rating/10))
var view: UIView
view = UIView(frame: CGRect(x: 0, y: 0, width: width, height: self.frame.size.height))
view.backgroundColor = UIColor.red
self.addSubview(view)
}
}
Now you can call this class with custom init method like that:
// chnage frame and rate according to your requirment
let rView = RatingViewController(frame: CGRect(x: 0, y: 0, width: 320, height: 300), rate: 2.0)