iOS Programming: The Big Nerd Ranch Guide, 7th Edition

Adding the Highlight View

Next you are going to add a circle beneath the currently selected image (Figure 18.5). This will give users context as to what is currently selected.

Figure 18.5  Completed highlight view

Open ImageSelector.swift and add a property for the highlight view.

Listing 18.11  Adding the highlight view (ImageSelector.swift)

private let highlightView: UIView = {
    let view = UIView()
    view.backgroundColor = view.tintColor
    view.translatesAutoresizingMaskIntoConstraints = false
    return view
}()

You worked with the global tint color in Chapter 16. This tint color is passed down the view hierarchy from ...