I am experiencing a problem with the latest version of Xcode, version 11 (now 11.3). I have a tab bar that has one too many items to fit and so has a More list tableview to the final two selections (tabs). This works fine, but when I change the appearance of the UIMoreListTableView, the changes happen when the tableview is not (yet) in the view hierarchy, resulting in a warning. This doesn't appear to cause a problem in practice, but I would like to be able to remove the warning. Here is the text of the warning I get:
2019-12-29 07:37:30.880610-0600 DunePlants[1545:546936] [TableView] Warning once only: UITableView was told to layout its visible cells and other contents without being in the view hierarchy (the table view or one of its superviews has not been added to a window). This may cause bugs by forcing views inside the table view to load and perform layout without accurate information (e.g. table view bounds, trait collection, layout margins, safe area insets, etc), and will also cause unnecessary performance overhead due to extra layout passes. Make a symbolic breakpoint at UITableViewAlertForLayoutOutsideViewHierarchy to catch this in the debugger and see what caused this to occur, so you can avoid this action altogether if possible, or defer it until the table view has been added to a window. Table view: <_UIMoreListTableView: 0x10604c000; frame = (0 20; 375 647); clipsToBounds = YES; autoresize = W+H; tintColor = <UIDynamicCatalogColor: 0x2839d4540; name = ERG-green>; gestureRecognizers = <NSArray: 0x283903150>; layer = <CALayer: 0x28374b960>; contentOffset: {0, 0}; contentSize: {375, 88}; adjustedContentInset: {0, 0, 0, 0}; dataSource: <UIMoreListController: 0x105266770>>
If I don't try to set the font and tintColor of the More List TableView, I don't get a warning. But I want to use a font and color consistent with my choices for the rest of the App. Here is the code I use:
class ERGViewController: UITabBarController {
override func viewDidLoad() {
super.viewDidLoad()
}
override func viewDidAppear(_ animated: Bool) {
//Next line gets rid of edit button and ability to reorder tabs.
moreNavigationController.topViewController?.navigationItem.rightBarButtonItem = nil
//If above line is commented out, you need to color the Edit button appropriately
moreNavigationController.topViewController?.navigationItem.rightBarButtonItem?.tintColor = UIColor.custom
if let moreList = moreNavigationController.viewControllers.first(where: { String(describing: type(of: $0)) == "UIMoreListController" }) {
moreList.navigationItem.backBarButtonItem = UIBarButtonItem(title: "", style: .plain, target: nil, action: nil)
moreList.navigationItem.backBarButtonItem?.tintColor = UIColor.custom
}
tabBarController?.customizableViewControllers = []
if let moreTableView = moreNavigationController.topViewController?.view as? UITableView {
moreTableView.tintColor = UIColor.custom
for cell in moreTableView.visibleCells {
cell.tintColor = UIColor.custom
cell.textLabel?.font = UIFont(name: "AvenirNextCondensed-Medium", size: 20)
}
}
}
}
Is there someplace better to set the font and tintColor?
