view object not showing in swift simulator running xcode 8 - ios

Question

I have been working through the Food Tracker app tutorial as a project to learn Swift. I understand that this is full of bugs, but I have been researching ways to correctly format my code. I got to the star rating section, added the red button, separated it into 5 buttons, then added the stars. The stars showed up for a bit, but now do not show up in my simulator at all. I have cleaned my code, disconnected and added images and image code, disconnected and added my IBOutlets, etc. They still are not showing so I am thinking there has to be something I am missing in my code since I am new to this. Any help would be much appreciated.
import UIKit
class RatingControl: UIView {
// MARK: Properties
var rating = 0 {
didSet {
setNeedsLayout()
}
}
var ratingButtons = [UIButton]()
var spacing = 5
var stars = 5
// MARK: Initialization
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
let filledStar = UIImage(named: "filledStar")
let emptyStar = UIImage(named: "emptyStar")
for _ in 0..<5 {
let button = UIButton()
button.setImage(emptyStar, for: UIControlState())
button.setImage(filledStar, for: .selected)
button.setImage(filledStar, for: [.highlighted, .selected])
button.adjustsImageWhenHighlighted = false
button.addTarget(self, action: #selector(RatingControl.ratingButtonTapped(_:)), for: .touchDown); ratingButtons += [button]
addSubview(button)
}
}
override func layoutSubviews() {
// Set the button's width and height to a square the size of the frame's height.
let buttonSize = Int(frame.size.height)
var buttonFrame = CGRect(x: 0, y: 0, width: buttonSize, height: buttonSize)
// Offset each button's origin by the length of the button plus spacing.
for (index, button) in ratingButtons.enumerated() {
buttonFrame.origin.x = CGFloat(index * (buttonSize + spacing))
button.frame = buttonFrame
}
updateButtonSelectionStates()
}
override var intrinsicContentSize : CGSize {
let buttonSize = Int(frame.size.height)
let width = (buttonSize + spacing) * stars
return CGSize(width: width, height: buttonSize)
}
// MARK: Button Action
func ratingButtonTapped(_ button: UIButton) {
rating = ratingButtons.index(of: button)! + 1
updateButtonSelectionStates()
}
func updateButtonSelectionStates() {
for (index, button) in ratingButtons.enumerated() {
// If the index of a button is less than the rating, that button should be selected.
button.isSelected = index < rating
}
}
}

Answer 1

In your init?() method, you've missed adding button to ratingButtons array as a result nothing is turned up when the array is enumerated and accessed, and it is empty
Please add the following
self.ratingsButton.append(button)
right after
addSubview(button)
Hopefully the buttons will start showing up.