5f1820748e
When switching to the "system" theme mode, if the effective appearance matched the previous overridden theme mode, the theme change would be ignored. By comparing the mode instead of just the effective appearance, we properly react to system appearance changes. Additionally, rework the transition animation for changing themes to match the animation of system appearance changes (i.e., a 0.5-second cross-dissolve). Fixes: https://signalmessenger.atlassian.net/browse/IOS-4431
56 lines
1.5 KiB
Swift
56 lines
1.5 KiB
Swift
//
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// Copyright 2019 Signal Messenger, LLC
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// SPDX-License-Identifier: AGPL-3.0-only
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//
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import UIKit
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public class OWSWindow: UIWindow {
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public override init(frame: CGRect) {
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super.init(frame: frame)
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NotificationCenter.default.addObserver(
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self,
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selector: #selector(themeDidChange),
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name: .themeDidChange,
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object: nil
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)
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applyTheme()
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}
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// This useless override is defined so that you can call `-init` from Swift.
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public override init(windowScene: UIWindowScene) {
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fatalError("init(windowScene:) has not been implemented")
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}
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required init?(coder: NSCoder) {
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fatalError("init(coder:) has not been implemented")
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}
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@objc
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private func themeDidChange() {
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applyTheme()
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}
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private func applyTheme() {
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// Ensure system UI elements use the appropriate styling for the selected theme.
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switch Theme.getOrFetchCurrentMode() {
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case .light:
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overrideUserInterfaceStyle = .light
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case .dark:
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overrideUserInterfaceStyle = .dark
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case .system:
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overrideUserInterfaceStyle = .unspecified
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}
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}
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public override func traitCollectionDidChange(_ previousTraitCollection: UITraitCollection?) {
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super.traitCollectionDidChange(previousTraitCollection)
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if traitCollection.hasDifferentColorAppearance(comparedTo: previousTraitCollection) {
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Theme.systemThemeChanged()
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}
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}
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}
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