After updating to Swift 4, I am getting a compiler error:
Static member 'appearance' cannot be used on protocol metatype 'UIAppearance.Protocol'
Here is my viewWillAppear
method in my custom Tab Bar Controller subclass, I am setting the font of the item text.
override func viewWillAppear(_ animated: Bool) {
super.viewWillAppear(animated)
// compiler error on line below
UIAppearance.appearance().setTitleTextAttributes([NSAttributedStringKey.font: font], for: UIControlState.normal)
}
I'm having trouble fixing this, any guidance would be appreciated, thanks!
Right - the current Swift 4 conversion tool (as of Xcode 9 Beta 4) gets a little carried away.
I was able to fix the problem quickly by reverting the UIAppearance
conversion code, then updating the individual attributes.
For example, in Swift 3 I had:
UITabBarItem.appearance().setTitleTextAttributes([NSForegroundColorAttributeName: UIColor.white], for: .selected)
Xcode "helped" me out by changing it to:
UIAppearance.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.white], for: .selected)
I was able to quiet the errors by half-reverting, to:
UITabBarItem.appearance().setTitleTextAttributes([NSAttributedStringKey.foregroundColor: UIColor.white], for: .selected)