Automatically add Accessibility Labels/Identifiers to all components that extend UIView

UIView+Accessibility.swift

import UIKit

private func isExcluded(_ kind: AnyClass) -> Bool {
    let name = String(describing: kind)
    return (name.count > 2 && name.prefix(2) == "UI") ||
        (name.count > 3 && name.prefix(3) == "_UI")
}

extension UIControl {
    override open var accessibilityIdentifier: String? {
        get {
            guard isExcluded(type(of: self)) else {
                return String(describing: type(of: self))
            }
            return super.accessibilityIdentifier
        }
        set {
            guard isExcluded(type(of: self)) else {
                return
            }
            super.accessibilityIdentifier = newValue
        }
    }
}

extension UIView {
    override open var isAccessibilityElement: Bool {
        get {
            guard isExcluded(type(of: self)) else {
                return true
            }
            return super.isAccessibilityElement
        }
        set {
            guard isExcluded(type(of: self)) else {
                return
            }
            super.isAccessibilityElement = newValue
        }
    }

    override open var accessibilityLabel: String? {
        get {
            guard isExcluded(type(of: self)) else {
                return String(describing: type(of: self))
            }
            return super.accessibilityLabel
        }
        set {
            guard isExcluded(type(of: self)) else {
                return
            }
            super.accessibilityLabel = newValue
        }
    }
}

private let debugAccessibilityEnabled = true

extension UIView {
    func debugAccessibility() {
        guard debugAccessibilityEnabled else { return }
        debugPrint("Accessibility")
        _debugAccessibility()
    }

    private func _debugAccessibility(nestingLevel: Int = 0) {
        let prefix = String(repeating: "-", count: nestingLevel + 2)
        if let accessibilityIdentifier = accessibilityIdentifier {
            debugPrint("\(prefix) id:", accessibilityIdentifier)
        }
        if let accessibilityLabel = accessibilityLabel {
            debugPrint("\(prefix) label:", accessibilityLabel)
        }
        subviews.forEach { $0._debugAccessibility(nestingLevel: nestingLevel + 2) }
    }
}

extension UIViewController {
    func debugAccessibility() {
        view.debugAccessibility()
    }
}

// How to use:

class ExampleButton: UIButton() { }

exampleButton.debugAccessibility()