/// <summary>
/// Applies a theme to the navigation bar. Note, this does not update the theme for the title.
/// </summary>
/// <param name="navigationBar">A navigation bar to apply the theme to.</param>
/// <param name="theme">The theme to apply to the navigation bar.</param>
public static void ApplyTheme(this UINavigationBar navigationBar, NavigationBarTheme theme)
{
UIColor backgroundColor = theme.BackgroundColor.ToUIColor();
navigationBar.BackgroundColor = backgroundColor;
navigationBar.BarTintColor = backgroundColor;
navigationBar.Translucent = theme.BackgroundColor.Alpha == 0;
navigationBar.TintColor = theme.ItemColor.ToUIColor();
if (theme.ShadowColor.Alpha > 0)
{
nfloat height = 1.0f / UIScreen.MainScreen.Scale;
UIView shadow = new UIView(new CGRect(0, navigationBar.Frame.Height, navigationBar.Frame.Width, height));
shadow.BackgroundColor = theme.ShadowColor.ToUIColor();
navigationBar.ShadowImage = null;
navigationBar.AddSubview(shadow);
}
else
{
navigationBar.ShadowImage = new UIImage();
}
UIStringAttributes attributes = new UIStringAttributes();
attributes.Font = ViewThemeExtensions.GetFont(theme.FontName, ViewFontSizes.LargeFontSize, FontStyle.Bold);
attributes.ForegroundColor = theme.FontColor.ToUIColor();
navigationBar.TitleTextAttributes = attributes;
}
private void SetupNavigationBar()
{
// Transparent background
UIImage emptyImage = new UIImage();
// NavigationController.NavigationBar.Translucent = true;
NavigationController.NavigationBar.Translucent = false;
NavigationController.NavigationBar.BarTintColor = ColorHelper.FromType(ColorType.Navigationbar);
// NavigationController.NavigationBar.SetBackgroundImage(emptyImage, UIBarMetrics.Default);
// NavigationController.NavigationBar.ShadowImage = emptyImage;
// NavigationController.NavigationBar.BackgroundColor = UIColor.Red;
UINavigationBar navigationBar = NavigationController.NavigationBar;
// NSObject objValue = NSObject.FromObject(false);
// NavigationController.NavigationBar.SetValueForKey(objValue, new NSString("hidesShadow"));
if (UIDevice.CurrentDevice.CheckSystemVersion(12, 0))
{
var userInterfaceStyle = TraitCollection.UserInterfaceStyle;
if (userInterfaceStyle == UIUserInterfaceStyle.Dark)
{
logoImageView = new UIImageView(UIImage.FromBundle("logo").ImageWithRenderingMode(UIImageRenderingMode.AlwaysTemplate));
logoImageView.TintColor = ColorHelper.FromType(ColorType.Logo);
}
else
{
logoImageView = new UIImageView(UIImage.FromBundle("logo"));
}
}
else
{
logoImageView = new UIImageView(UIImage.FromBundle("logo"));
}
// logoImageView.ContentMode = UIViewContentMode.ScaleAspectFit;
double imageHeight = navigationBar.Bounds.Height * 0.7;
double computedImageWidth = (imageHeight * logoImageView.Image.CGImage.Width) / logoImageView.Image.CGImage.Height;
logoImageView.Frame = new CGRect((navigationBar.Bounds.Width / 2) - (computedImageWidth / 2), (navigationBar.Bounds.Height / 2) - (imageHeight / 2), computedImageWidth, imageHeight);
navigationBar.AddSubview(logoImageView);
NavigationItem.RightBarButtonItem.TintColor = ColorHelper.FromType(ColorType.NavigationbarTint);
}
// Custom Methods
protected void StyleNavigationBar(UIColor primaryColor, UIColor primaryDarkColor, string title)
{
this.NavigationController.SetNavigationBarHidden(true, false);
UINavigationBar newNavBar = new UINavigationBar(new CGRect(0, 0, this.View.Bounds.Width, 104.0));
newNavBar.BarTintColor = primaryColor;
newNavBar.TintColor = UIColor.White;
newNavBar.Translucent = false;
NavItem = new UINavigationItem();
NavItem.HidesBackButton = true;
var titleView = new UIView(new CGRect(0, 0, this.View.Bounds.Width, 88.0f));
var titleLabel = new UILabel(new CGRect(0, 0, this.View.Bounds.Width, 88.0f));
titleLabel.Font = UIFont.SystemFontOfSize(17, UIFontWeight.Semibold);
titleLabel.TextColor = UIColor.White;
titleLabel.AdjustsFontSizeToFitWidth = true;
titleLabel.Text = title;
titleView.AddSubview(titleLabel);
titleView.AutoresizingMask = UIViewAutoresizing.FlexibleLeftMargin | UIViewAutoresizing.FlexibleTopMargin | UIViewAutoresizing.FlexibleRightMargin | UIViewAutoresizing.FlexibleBottomMargin;
titleLabel.TranslatesAutoresizingMaskIntoConstraints = false;
NSLayoutConstraint trailing = NSLayoutConstraint.Create(titleLabel, NSLayoutAttribute.Trailing, NSLayoutRelation.Equal, titleView, NSLayoutAttribute.Trailing, 1.0f, 0.0f);
NSLayoutConstraint leading = NSLayoutConstraint.Create(titleLabel, NSLayoutAttribute.Leading, NSLayoutRelation.Equal, titleView, NSLayoutAttribute.Leading, 1.0f, 0.0f);
NSLayoutConstraint bottom = NSLayoutConstraint.Create(titleLabel, NSLayoutAttribute.Bottom, NSLayoutRelation.Equal, titleView, NSLayoutAttribute.Bottom, 1.0f, 0.0f);
NSLayoutConstraint top = NSLayoutConstraint.Create(titleLabel, NSLayoutAttribute.Top, NSLayoutRelation.Equal, titleView, NSLayoutAttribute.Top, 1.0f, 0.0f);
titleView.AddConstraint(trailing);
titleView.AddConstraint(leading);
titleView.AddConstraint(bottom);
titleView.AddConstraint(top);
NavItem.TitleView = titleView;
var statusBarView = new UIView(new CGRect(0, 0, this.View.Bounds.Width, 20));
statusBarView.BackgroundColor = primaryDarkColor;
newNavBar.SetItems(new[] { NavItem }, false);
newNavBar.AddSubview(statusBarView);
this.View.AddSubview(newNavBar);
}