metatext-app-ios-iphone-ipad/iOS/TabNavigation.swift

82 lines
3.2 KiB
Swift

// Copyright © 2020 Metabolist. All rights reserved.
import SwiftUI
import KingfisherSwiftUI
struct TabNavigation: View {
@ObservedObject var viewModel: MainNavigationViewModel
@EnvironmentObject var rootViewModel: RootViewModel
@Environment(\.displayScale) var displayScale: CGFloat
var body: some View {
TabView(selection: $viewModel.selectedTab) {
ForEach(MainNavigationViewModel.Tab.allCases) { tab in
NavigationView {
view(tab: tab)
}
.navigationViewStyle(StackNavigationViewStyle())
.tabItem {
Label(tab.title, systemImage: tab.systemImageName)
.accessibility(label: Text(tab.title))
}
.tag(tab)
}
}
.sheet(isPresented: $viewModel.presentingSettings) {
SettingsView(viewModel: viewModel.settingsViewModel())
.environmentObject(rootViewModel)
}
.onReceive(rootViewModel.$mainNavigationViewModel.map { _ in ()},
perform: viewModel.refreshIdentity)
.onReceive(NotificationCenter.default
.publisher(for: UIScene.willEnterForegroundNotification)
.map { _ in () },
perform: viewModel.refreshIdentity)
}
}
private extension TabNavigation {
@ViewBuilder
func view(tab: MainNavigationViewModel.Tab) -> some View {
switch tab {
case .timelines:
TimelineView()
.navigationBarTitle(viewModel.identity.handle, displayMode: .inline)
.navigationBarItems(
leading: Button {
viewModel.presentingSettings.toggle()
} label: {
KFImage(viewModel.identity.image,
options: .downsampled(dimension: 28, scaleFactor: displayScale))
.placeholder { Image(systemName: "gear") }
.renderingMode(.original)
.contextMenu(ContextMenu {
ForEach(viewModel.recentIdentities) { recentIdentity in
Button {
rootViewModel.newIdentitySelected(id: recentIdentity.id)
} label: {
Label(
title: { Text(recentIdentity.handle) },
icon: {
KFImage(recentIdentity.image,
options: .downsampled(dimension: 28, scaleFactor: displayScale))
.renderingMode(.original)
})
}
}
})
})
default: Text(tab.title)
}
}
}
#if DEBUG
struct TabNavigation_Previews: PreviewProvider {
static var previews: some View {
TabNavigation(viewModel: .development)
.environmentObject(RootViewModel.development)
}
}
#endif