How does a zero rectangle cover the entire area of "selectedBackgroundView"?

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1

let selectedView = UIView(frame: CGRect.zero)
selectedView.backgroundColor = UIColor(red: 20/255, green: 160/255, blue: 160/255, alpha: 1)
selectedBackgroundView = selectedView

Through iOS Apprentice tutorials I came across the above block of code. How does a zero rectangle cover the entire area of a tableView cell’s background, seeing that the width and height of it is zero? Does it get scaled?

2

Yes, it gets scaled automatically by the table view to cover the entire area of the cell.