protected override void Dispose(bool disposing)
{
if (disposing)
{
_tabBarAppearance?.Dispose();
_tabBarAppearance = null;
Page.SendDisappearing();
Tabbed.PropertyChanged -= OnPropertyChanged;
Tabbed.PagesChanged -= OnPagesChanged;
FinishedCustomizingViewControllers -= HandleFinishedCustomizingViewControllers;
}
base.Dispose(disposing);
}
private void UpdateTabBarAppearance()
{
// https://developer.apple.com/forums/thread/682420
var deviceActionService = ServiceContainer.Resolve <IDeviceActionService>("deviceActionService");
if (deviceActionService.SystemMajorVersion() >= 15)
{
var appearance = new UITabBarAppearance();
appearance.ConfigureWithOpaqueBackground();
appearance.BackgroundColor = ThemeHelpers.TabBarBackgroundColor;
appearance.StackedLayoutAppearance.Normal.IconColor = ThemeHelpers.TabBarItemColor;
appearance.StackedLayoutAppearance.Normal.TitleTextAttributes =
new UIStringAttributes {
ForegroundColor = ThemeHelpers.TabBarItemColor
};
TabBar.StandardAppearance = appearance;
TabBar.ScrollEdgeAppearance = TabBar.StandardAppearance;
}
}
internal static void UpdateiOS15TabBarAppearance(
this UITabBar tabBar,
ref UITabBarAppearance _tabBarAppearance,
UIColor?defaultBarColor,
UIColor?defaultBarTextColor,
Color?selectedTabColor,
Color?unselectedTabColor,
Color?barBackgroundColor,
Color?barTextColor)
{
if (_tabBarAppearance == null)
{
_tabBarAppearance = new UITabBarAppearance();
_tabBarAppearance.ConfigureWithDefaultBackground();
}
var effectiveBarColor = (barBackgroundColor == null) ? defaultBarColor : barBackgroundColor.ToPlatform();
// Set BarBackgroundColor
if (effectiveBarColor != null)
{
_tabBarAppearance.BackgroundColor = effectiveBarColor;
}
// Set BarTextColor
var effectiveBarTextColor = (barTextColor == null) ? defaultBarTextColor : barTextColor.ToPlatform();
if (effectiveBarTextColor != null)
{
_tabBarAppearance.StackedLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes
{
ForegroundColor = effectiveBarTextColor
};
}
// Update colors for all variations of the appearance to also make it work for iPads, etc. which use different layouts for the tabbar
// Also, set ParagraphStyle explicitly. This seems to be an iOS bug. If we don't do this, tab titles will be truncat...
// Set SelectedTabColor
if (selectedTabColor != null)
{
var foregroundColor = selectedTabColor.ToPlatform();
_tabBarAppearance.StackedLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.StackedLayoutAppearance.Selected.IconColor = foregroundColor;
_tabBarAppearance.InlineLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.InlineLayoutAppearance.Selected.IconColor = foregroundColor;
_tabBarAppearance.CompactInlineLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.CompactInlineLayoutAppearance.Selected.IconColor = foregroundColor;
}
else
{
var foregroundColor = UITabBar.Appearance.TintColor;
_tabBarAppearance.StackedLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.StackedLayoutAppearance.Selected.IconColor = foregroundColor;
_tabBarAppearance.InlineLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.InlineLayoutAppearance.Selected.IconColor = foregroundColor;
_tabBarAppearance.CompactInlineLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.CompactInlineLayoutAppearance.Selected.IconColor = foregroundColor;
}
// Set UnselectedTabColor
if (unselectedTabColor != null)
{
var foregroundColor = unselectedTabColor.ToPlatform();
_tabBarAppearance.StackedLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.StackedLayoutAppearance.Normal.IconColor = foregroundColor;
_tabBarAppearance.InlineLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.InlineLayoutAppearance.Normal.IconColor = foregroundColor;
_tabBarAppearance.CompactInlineLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foregroundColor, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.CompactInlineLayoutAppearance.Normal.IconColor = foregroundColor;
}
else
{
var foreground = UITabBar.Appearance.TintColor;
_tabBarAppearance.StackedLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foreground, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.StackedLayoutAppearance.Normal.IconColor = foreground;
_tabBarAppearance.InlineLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foreground, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.InlineLayoutAppearance.Normal.IconColor = foreground;
_tabBarAppearance.CompactInlineLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = foreground, ParagraphStyle = NSParagraphStyle.Default
};
_tabBarAppearance.CompactInlineLayoutAppearance.Normal.IconColor = foreground;
}
// Set the TabBarAppearance
tabBar.StandardAppearance = tabBar.ScrollEdgeAppearance = _tabBarAppearance;
}
void UpdateiOS15TabBarAppearance(UITabBarController controller, ShellAppearance appearance)
{
IShellAppearanceElement appearanceElement = appearance;
var tabBar = controller.TabBar;
var tabBarAppearance = new UITabBarAppearance();
tabBarAppearance.ConfigureWithOpaqueBackground();
// Set TabBarBackgroundColor
var tabBarBackgroundColor = appearanceElement.EffectiveTabBarBackgroundColor;
if (tabBarBackgroundColor != null)
{
tabBarAppearance.BackgroundColor = tabBarBackgroundColor.ToPlatform();
}
// Set TabBarTitleColor
var tabBarTitleColor = appearanceElement.EffectiveTabBarTitleColor;
// Update colors for all variations of the appearance to also make it work for iPads, etc. which use different layouts for the tabbar
// Also, set ParagraphStyle explicitly. This seems to be an iOS bug. If we don't do this, tab titles will be truncat...
if (tabBarTitleColor != null)
{
tabBarAppearance.StackedLayoutAppearance.Normal.TitleTextAttributes = tabBarAppearance.StackedLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarTitleColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.StackedLayoutAppearance.Normal.IconColor = tabBarAppearance.StackedLayoutAppearance.Selected.IconColor = tabBarTitleColor.ToPlatform();
tabBarAppearance.InlineLayoutAppearance.Normal.TitleTextAttributes = tabBarAppearance.InlineLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarTitleColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.InlineLayoutAppearance.Normal.IconColor = tabBarAppearance.InlineLayoutAppearance.Selected.IconColor = tabBarTitleColor.ToPlatform();
tabBarAppearance.CompactInlineLayoutAppearance.Normal.TitleTextAttributes = tabBarAppearance.CompactInlineLayoutAppearance.Selected.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarTitleColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.CompactInlineLayoutAppearance.Normal.IconColor = tabBarAppearance.CompactInlineLayoutAppearance.Selected.IconColor = tabBarTitleColor.ToPlatform();
}
//Set TabBarUnselectedColor
var tabBarUnselectedColor = appearanceElement.EffectiveTabBarUnselectedColor;
if (tabBarUnselectedColor != null)
{
tabBarAppearance.StackedLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarUnselectedColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.StackedLayoutAppearance.Normal.IconColor = tabBarUnselectedColor.ToPlatform();
tabBarAppearance.InlineLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarUnselectedColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.InlineLayoutAppearance.Normal.IconColor = tabBarUnselectedColor.ToPlatform();
tabBarAppearance.CompactInlineLayoutAppearance.Normal.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarUnselectedColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.CompactInlineLayoutAppearance.Normal.IconColor = tabBarUnselectedColor.ToPlatform();
}
// Set TabBarDisabledColor
var tabBarDisabledColor = appearanceElement.EffectiveTabBarDisabledColor;
if (tabBarDisabledColor != null)
{
tabBarAppearance.StackedLayoutAppearance.Disabled.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarDisabledColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.StackedLayoutAppearance.Disabled.IconColor = tabBarDisabledColor.ToPlatform();
tabBarAppearance.InlineLayoutAppearance.Disabled.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarDisabledColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.InlineLayoutAppearance.Disabled.IconColor = tabBarDisabledColor.ToPlatform();
tabBarAppearance.CompactInlineLayoutAppearance.Disabled.TitleTextAttributes = new UIStringAttributes {
ForegroundColor = tabBarDisabledColor.ToPlatform(), ParagraphStyle = NSParagraphStyle.Default
};
tabBarAppearance.CompactInlineLayoutAppearance.Disabled.IconColor = tabBarDisabledColor.ToPlatform();
}
tabBar.StandardAppearance = tabBar.ScrollEdgeAppearance = tabBarAppearance;
}
