UIView.groupTransition(
    with: [label, aButton, ...],    // Add all your views here
    duration: 0.3,
    delay: 0.0,
    type: .fade,                    // .fade, .moveIn, .push, .reveal
    subtype: nil,
    timing: .easeInOut              // .linear, .easeIn, .easeOut, .easeInOut
) {
    // Your animations go here...
    self.label.text = "Hello World"
    self.aButton.setImage(UIImage(named: "cat"), for: .normal)
} completion: { completed in
    print("Animation completed!")
}