How to hide elements in a Stack View

isHidden property doesn't work, but you can use alpha and achieve the same result,

QBIndicator.alpha = 1.0 will work for QBIndicator.isHidden = false and QBIndicator.alpha = 0.0 will work for QBIndicator.isHidden = true

setting a view to hidden should make it no longer visible, regardless of whether or not it inside a UIStackView.

The benefit of UIStackView is that it provides free animation through the isHidden property, like so:

// Assuming stackViewSubView.isHidden == false here
UIView.animate(withDuration: 0.25, animations: {
    self.stackViewSubView.isHidden = true
    self.view.layoutIfNeeded()
})