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Add support for back button accessibility trait. (#219)
* adding back button trait
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Example/AccessibilitySnapshot/NavBarBackButtonAccessibilityTraitsViewController.swift
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,126 @@ | ||
| // | ||
| // Copyright 2024 Square Inc. | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
| // | ||
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| import Paralayout | ||
| import UIKit | ||
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| final class NavBarBackButtonAccessibilityTraitsViewController: AccessibilityViewController { | ||
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| // MARK: - Public Properties | ||
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| init(titles: [String?] = [nil, nil]) { | ||
| self.titles = titles | ||
| super.init(nibName: nil, bundle: nil) | ||
| } | ||
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| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
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| var titles: [String?] | ||
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| // MARK: - Private Properties | ||
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| private var rootView: View { | ||
| return view as! View | ||
| } | ||
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| // MARK: - UIViewController | ||
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| override func loadView() { | ||
| view = View(titles: titles) | ||
| } | ||
| } | ||
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| // MARK: - | ||
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| extension NavBarBackButtonAccessibilityTraitsViewController { | ||
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| final class Child: UIViewController { | ||
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| init(_ title: String? = nil) { | ||
| super.init(nibName: nil, bundle: nil) | ||
| self.title = title | ||
| } | ||
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| required init?(coder: NSCoder) { | ||
| super.init(coder: coder) | ||
| } | ||
| let label = UILabel() | ||
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| override func viewDidLoad() { | ||
| super.viewDidLoad() | ||
| navigationItem.hidesBackButton = false | ||
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| label.text = "Back Button Accessibility Traits - " | ||
| label.text?.append(hasTitle ? "With Titles" : "Without Titles" ) | ||
| view.addSubview(label) | ||
| } | ||
| private var hasTitle: Bool { | ||
| self.title != nil | ||
| } | ||
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| override func viewDidLayoutSubviews() { | ||
| super.viewDidLayoutSubviews() | ||
| label.sizeToFit() | ||
| let x = (view.bounds.width / 2) - (label.frame.size.width / 2) | ||
| let y = (view.bounds.height / 2) - (label.frame.size.height / 2) | ||
| label.frame = CGRect(origin: CGPoint(x: x, y: y), size: label.frame.size) | ||
| } | ||
| } | ||
| } | ||
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| extension NavBarBackButtonAccessibilityTraitsViewController { | ||
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| final class View: UIView { | ||
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| // MARK: - Life Cycle | ||
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| init(titles: [String?]) { | ||
| self.titles = titles | ||
| super.init(frame: .zero) | ||
| addSubview(navView) | ||
| navController.viewControllers = titles.map { Child($0) } | ||
| } | ||
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| @available(*, unavailable) | ||
| required init?(coder: NSCoder) { | ||
| fatalError("init(coder:) has not been implemented") | ||
| } | ||
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| // MARK: - Public Properties | ||
| var titles: [String?] | ||
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| let navController = UINavigationController() | ||
| var navView: UIView { | ||
| navController.view | ||
| } | ||
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| // MARK: - Private Properties | ||
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| // MARK: - UIView | ||
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| override func layoutSubviews() { | ||
| super.layoutSubviews() | ||
| navView.frame = bounds | ||
| } | ||
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| } | ||
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| } |
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