theme IOS xamarin form ALL IS grey black

xardalodin

In android I can set styles and customize ALOT
how do I do this in IOS.
everything is dull and gray.
tried adding to app in xaml but did nothing..

ColeX

this line generates the error above.. crashing the core of xamarin

The two packages Xamarin.Forms.Theme.Base and Xamarin.Forms.Theme.Dark is used for Xamarin.Forms, you don't need to install them on iOS platform.

do you know how to set the background picture of the actionbar/taskbar the one at the top

It's easy to achieve with Appearance .

public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    {
        global::Xamarin.Forms.Forms.Init();
        LoadApplication(new App());

        UINavigationBar.Appearance.SetBackgroundImage(UIImage.FromFile("YourImage.png").CreateResizableImage(UIEdgeInsets.Zero), UIBarMetrics.Default);

        return base.FinishedLaunching(app, options);
    } 

ColeX

Are you developing Xamarin.Forms or Xamarin.iOS ?

If XF : create your own resource dictionary themes in App.xaml
refer https://docs.microsoft.com/en-us/xamarin/xamarin-forms/user-interface/themes/custom

If Xi : use UIAppearance class
check https://forums.xamarin.com/discussion/comment/191948/#Comment_191948

xardalodin

Severity Code Description Project Path File Line Suppression State
Error Can't resolve the reference 'System.Void Xamarin.Forms.Log::Warning(System.String,System.String)', referenced from the method 'System.Void Xamarin.Forms.Pages.BaseDataSource/d__22::MoveNext()' in 'Xamarin.Forms.Core, Version=2.0.0.0, Culture=neutral, PublicKeyToken=null'. Template.iOS

nuget packages
Xamarin.Forms.Theme.Base
Xamarin.Forms.Theme.Dark

in app.xaml added
xmlns:dark="clr-namespace:Xamarin.Forms.Themes;assembly=Xamarin.Forms.Theme.Dark"`

<Application.Resources>
        <ResourceDictionary MergedWith="dark:DarkThemeResources" />  this line 
 </Application.Resources>

this line generates the error above.. crashing the core of xamarin

and I'am using Xamarin forms..

and

"<ResourceDictionary>" does nothing

and cant find a page with everything one could change in <ResourceDictionary>

do you know how to set the background picture of the actionbar/taskbar the one at the top

ColeX

this line generates the error above.. crashing the core of xamarin

The two packages Xamarin.Forms.Theme.Base and Xamarin.Forms.Theme.Dark is used for Xamarin.Forms, you don't need to install them on iOS platform.

do you know how to set the background picture of the actionbar/taskbar the one at the top

It's easy to achieve with Appearance .

public override bool FinishedLaunching(UIApplication app, NSDictionary options)
    {
        global::Xamarin.Forms.Forms.Init();
        LoadApplication(new App());

        UINavigationBar.Appearance.SetBackgroundImage(UIImage.FromFile("YourImage.png").CreateResizableImage(UIEdgeInsets.Zero), UIBarMetrics.Default);

        return base.FinishedLaunching(app, options);
    } 

xardalodin

thx
was using
UINavigationBar.Appearance.BarTintColor = UIColor.FromPatternImage(UIImage.FromBundle("actionbar3.png"));
Iam new to IOS..
so much to READ...

using a 
    [assembly: ExportRenderer(typeof(ExtendedViewCell), typeof(ExtendedViewCellRenderer))]
    namespace Template.iOS
    {
        public class ExtendedViewCellRenderer: ViewCellRenderer
        {
            public override UITableViewCell GetCell(Cell item, UITableViewCell reusableCell, UITableView tv)
            {
                var cell = base.GetCell(item, reusableCell, tv);
                var view = item as ExtendedViewCell;
                cell.SelectedBackgroundView = new UIView
                {
                    BackgroundColor = view.SelectedBackgroundColor.ToUIColor(),
                };

                return cell;
            }

        }

to change the color of the listviews select in Xaml , IS there a better way? bit extream

mmm UIView.Appearance.TintColor gona see what this does..

ColeX

I suggest you not use Appearance for this .

Since UIView.Appearance.TintColor would affect all the UIView in your project , but here you just want to change cell.SelectedBackgroundView.

xardalodin

cell.SelectedBackgroundView

cant find it? its not in cell anywhere

UITableView.Appearance.SectionIndexColor = UIColor.Green;
UITableView.Appearance.SectionIndexBackgroundColor =
UITableView.Appearance.SectionIndexTrackingBackgroundColor = UIColor.Green;
UITableView.Appearance.BackgroundColor = UIColor.Green;
UITableViewCell.Appearance.BackgroundColor = UIColor.Green;
UITableViewCell.Appearance.TintColor = UIColor.Green;

not working..

only way seams to be via the code above

cell only gives me the xamarin.forms Cell could be a conflict should be called xCell

ColeX

I'm afraid you have to use custom renderer .