Nested UIStackViews Broken Constraints

Question

I have a complex view hierarchy, built in Interface Builder, with nested UIStackViews. I get \"unsatisfiable constraints\" notices every time I hide some of my inner stackviews.

Answer 1

In my case I was adding width and height constraint to a navigation bar button, as per the advice above I only added lower priority to the constraints.

open func customizeNavigationBarBackButton() {
        let _selector = #selector(UIViewController._backButtonPressed(_:))
        let backButtonView = UIButton(type: .custom)
        backButtonView.setImage(UIImage(named: "icon_back"), for: .normal)
        backButtonView.imageEdgeInsets = UIEdgeInsets.init(top: 0, left: -30, bottom: 0, right: 0)
        backButtonView.snp.makeConstraints { $0.width.height.equalTo(44).priority(900) }
        backButtonView.addTarget(self, action: _selector, for: .touchUpInside)

        let backButton = UIBarButtonItem(customView: backButtonView)
        self.navigationItem.leftBarButtonItem = backButton
    }