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e0fef69db3
### Context In working on #4042 I discovered that Bottom Navigation (Swift) example isn't working as intended ### The problem No elements were on screen ### The fix Call the common init in the initializer ### Screenshots | Before | After | | ----- | ----- | |||
93 lines
3.1 KiB
Swift
93 lines
3.1 KiB
Swift
// Copyright 2017-present the Material Components for iOS authors. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import Foundation
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import MaterialComponents.MaterialBottomNavigation_ColorThemer
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import MaterialComponents.MaterialColorScheme
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class BottomNavigationTypicalUseSwiftExample: UIViewController {
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var colorScheme = MDCSemanticColorScheme()
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// Create a bottom navigation bar to add to a view.
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let bottomNavBar = MDCBottomNavigationBar()
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init() {
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super.init(nibName: nil, bundle: nil)
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commonBottomNavigationTypicalUseSwiftExampleInit()
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}
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@available(*, unavailable)
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required init?(coder aDecoder: NSCoder) {
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super.init(coder: aDecoder)
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}
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func commonBottomNavigationTypicalUseSwiftExampleInit() {
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view.backgroundColor = .lightGray
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view.addSubview(bottomNavBar)
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// Always show bottom navigation bar item titles.
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bottomNavBar.titleVisibility = .always
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// Cluster and center the bottom navigation bar items.
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bottomNavBar.alignment = .centered
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// Add items to the bottom navigation bar.
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let tabBarItem1 = UITabBarItem(title: "Home", image: UIImage(named: "Home"), tag: 0)
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let tabBarItem2 =
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UITabBarItem(title: "Messages", image: UIImage(named: "Email"), tag: 1)
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let tabBarItem3 =
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UITabBarItem(title: "Favorites", image: UIImage(named: "Favorite"), tag: 2)
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bottomNavBar.items = [ tabBarItem1, tabBarItem2, tabBarItem3 ]
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// Select a bottom navigation bar item.
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bottomNavBar.selectedItem = tabBarItem2;
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}
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func layoutBottomNavBar() {
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let size = bottomNavBar.sizeThatFits(view.bounds.size)
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var bottomNavBarFrame = CGRect(x: 0,
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y: view.bounds.height - size.height,
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width: size.width,
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height: size.height)
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if #available(iOS 11.0, *) {
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bottomNavBarFrame.size.height += view.safeAreaInsets.bottom
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bottomNavBarFrame.origin.y -= view.safeAreaInsets.bottom
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}
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bottomNavBar.frame = bottomNavBarFrame
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}
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override func viewWillLayoutSubviews() {
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super.viewWillLayoutSubviews()
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layoutBottomNavBar()
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}
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override func viewWillAppear(_ animated: Bool) {
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super.viewWillAppear(animated)
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self.navigationController?.setNavigationBarHidden(true, animated: animated)
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}
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}
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// MARK: Catalog by convention
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extension BottomNavigationTypicalUseSwiftExample {
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class func catalogMetadata() -> [String: Any] {
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return [
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"breadcrumbs": ["Bottom Navigation", "Bottom Navigation (Swift)"],
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"primaryDemo": false,
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"presentable": false,
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]
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}
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}
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