FocusZPositionMutating

Automatically mutates view's layer.zPosition to avoid focused view overlayed by unfocused view.

How to use

Conform to FocusZPositionMutating and call UIView.fzpm_swizzleDidUpdateFocus() in AppDelegate.

class FocusableView: UIView, FocusZPositionMutating {
    // Optionally implement your own focus animation like this.
    // override var canBecomeFocused: Bool {
    //     return true
    // }
    // override func didUpdateFocus(in context: UIFocusUpdateContext, with coordinator: UIFocusAnimationCoordinator) {
    //     coordinator.addCoordinatedAnimations({
    //         if context.nextFocusedView == self {
    //             self.transform = .init(scaleX: 1.3, y: 1.3)
    //         } else {
    //             self.transform = .identity
    //         }
    //     }, completion: nil)
    //     super.didUpdateFocus(in: context, with: coordinator)
    // }
}

Pass focus and unfocused zPosition to UIView.fzpm_swizzleDidUpdateFocus() if needed. It defaults to 1.0 and 0.0.

        do {
            try UIView.fzpm_swizzleDidUpdateFocus(focusedZPosition: 0.0, unfocusedZPosition: -0.5)
        } catch {
            if case FZPMError.invalidParameter = error {
                // handle error
            }
        }

Before

After

LICENSE

MIT