I got warning which I couldn't understand

Question

When I compiled my app I got this warning and I couldn't understand it.

/Users/imac/Desktop/MyApp/RechercherView.xib:44:0 This bar button item's style is set to 'plain'. This configuration is not supported when in a navigation item.

Answer 1

Plain is for when a bar button item is on a tab bar, it means there is no border at all and you just see the item. This is not supported on a nav bar and they must be bordered. If you wish to get the appearance of an item without a border, you should make your own custom UIButton to put up there