In MonoTouch 6.0.10 with SDK 6.1 I have the following in a tabbarcontroller and navigationcontroller:
public override bool ShouldAutorotate()
{
return true;
}
public override UIInterfaceOrientationMask SupportedInterfaceOrientations()
{
var orientations = ParentViewController.GetSupportedInterfaceOrientations();
foreach ( var controller in ViewControllers )
orientations = orientations & controller.GetSupportedInterfaceOrientations();
return orientations;
}
In AppDelegate I have:
public override UIInterfaceOrientationMask GetSupportedInterfaceOrientations (UIApplication application, UIWindow forWindow)
{
return UIInterfaceOrientationMask.All;
}
and in FinishedLaunching I have:
window.RootViewController = tabController;
In the tabbarcontroller and navigationcontroller this gets an error of the form 'HelloWorld.TabController.SupportedInterfaceOrientations() is marked as an override but no suitable method found to override (CS0115).'
Any suggestion appreciated!
Bill.
UIViewController defines GetSupportedInterfaceOrientations which you can override in your UITabBarController and UINavigationController subclasses.
The C# compiler error message (and your code) shows that you're missing the Get prefix.
Related
I'm using mvvmcross and implementing the view's interface in code behind. I would like to hide the navigation bar but I have not found a solution yet.
I tried
NavigationController.SetNavigationBarHidden(true, false);
and
NavigationController.NavigationBarHidden = true;
in different methods (ViewDidAppear and ViewWillAppear) but they don't have an impact on the UI.
Maybe someone could give me a hint. :-)
#Edit: Some more information:
My AppDelegate.cs
[Register("AppDelegate")]
public partial class AppDelegate : MvxApplicationDelegate
{
UIWindow _window;
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
_window = new UIWindow(UIScreen.MainScreen.Bounds);
var setup = new Setup(this, _window);
setup.Initialize();
var startup = Mvx.Resolve<IMvxAppStart>();
startup.Start();
_window.MakeKeyAndVisible();
return true;
}
}
Additionally I'm using a BaseView class which inherits from MvxViewController.
Okay, found the solution by myself:
Just paste the following code into the ViewDidLoad method in your MvxViewController class( for example FirstView.cs in many mvvmcross tutorials):
var navController = base.NavigationController;
navController.NavigationBarHidden = true;
I know it is a +6 years old question but came across finding a solution for this using MVVMCross and found out that using this into the xaml of your view should be enough: <NavigationPage.HasNavigationBar>False</NavigationPage.HasNavigationBar>
It should apply for both Xamarin Android and iOS.
This will kill it, let me know if you have questions.
[Register ("AppDelegate")]
public partial class AppDelegate : UIApplicationDelegate
{
// class-level declarations
UIWindow window;
MyViewController viewController;
MainViewController mainViewController;
UINavigationController navController;
public UINavigationController NavController { get { return navController; }}
//
// This method is invoked when the application has loaded and is ready to run. In this
// method you should instantiate the window, load the UI into it and then make the window
// visible.
//
// You have 17 seconds to return from this method, or iOS will terminate your application.
//
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
var navController = new UINavigationController();
navController.SetNavigationBarHidden (true, false);
window = new UIWindow (UIScreen.MainScreen.Bounds);
viewController = new MyViewController();
app.SetStatusBarStyle (UIStatusBarStyle.LightContent, true);
navController.PushViewController(viewController, false);
window.RootViewController = navController;
window.MakeKeyAndVisible ();
return true;
}
}
}
The default presenter uses a UINavigationController for the RootController on the window; so you can manipulate the navigation bar globally in the AppDelegate by grabbing it off the window and casting:
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
window = new UIWindow(UIScreen.MainScreen.Bounds);
new Setup(this, window).Initialize();
Mvx.Resolve<IMvxAppStart>().Start();
var navigationBar = ((UINavigationController)window.RootViewController).NavigationBar;
navigationBar.BackgroundColor = UIColor.Black;
navigationBar.BarTintColor = UIColor.Black;
navigationBar.TintColor = UIColor.White;
window.MakeKeyAndVisible();
return true;
}
EDIT 2: If you're looking for an answer to a similar problem, check Stuart's answer and my comments on it.
EDIT: I am actually getting a Mono.Debugger.Soft.VMDisconnectedException. I also recently installed Windows 8.1 and Resharper (though Resharper is suspended now).
When I access a very simple list property of my view model in my MVVMCross Xamarin iOS application, the program fails. It doesn't quit most of the time: it acts like it's running. The simulator has a black screen and there is no exception. If I breakpoint on if (messagesViewModel != null) source.ItemsSource = messagesViewModel.Messages; and then type messagesViewModel.Messages into the Immediate Window, everything stops, so I can tell it is failing at this line. If instead I "step over", it never moves to the next line.
I was having similar behavior when I was toggling this code in the MvxTableViewSource:
public override int RowsInSection(UITableView tableview, int section)
{
return 1;
}
My view model looks like this:
public class MessagesViewModel : MvxViewModel
{
private List<BaseMessage> _messages = null;
public List<BaseMessage> Messages
{
get
{
return _messages; //yes, I know I'm returning null
//I wasn't at first.
}
}
public MessagesViewModel()
{
}
}
This is my ViewDIdLoad on the MvxTableViewController:
public override void ViewDidLoad()
{
base.ViewDidLoad();
var source = new MessagesTableViewSource(TableView);
//was binding here, removed it for debug purposes
//failure on second line here
var messagesViewModel = ViewModel as MessagesViewModel;
if (messagesViewModel != null) source.ItemsSource = messagesViewModel.Messages;
TableView.Source = source;
TableView.ReloadData();
}
Some initialization code:
public class App : MvxApplication
{
public App()
{
var appStart = new MvxAppStart<MessagesViewModel>();
Mvx.RegisterSingleton<IMvxAppStart>(appStart);
}
}
public partial class AppDelegate : MvxApplicationDelegate
{
//empty functions removed.
public override bool FinishedLaunching(UIApplication app, NSDictionary options)
{
Window = new UIWindow(UIScreen.MainScreen.Bounds);
var presenter = new MvxTouchViewPresenter(this, Window);
var setup = new Setup(this, presenter);
setup.Initialize();
var startup = Mvx.Resolve<IMvxAppStart>();
startup.Start();
Window.MakeKeyAndVisible();
return true;
}
}
I suspect whatever the error is, it isn't in any of the code you have posted.
I just created a simple ViewModel:
public class FirstViewModel
: MvxViewModel
{
private List<string> _items = new List<string>() { "One", "Two", "Three"};
public List<string> Items
{
get { return _items; }
set { _items = value; RaisePropertyChanged(() => Items); }
}
}
And a simple View:
[Register("FirstView")]
public class FirstView : MvxTableViewController
{
public override void ViewDidLoad()
{
base.ViewDidLoad();
// ios7 layout
if (RespondsToSelector(new Selector("edgesForExtendedLayout")))
EdgesForExtendedLayout = UIRectEdge.None;
var firstViewModel = ViewModel as FirstViewModel;
var source = new MessagesTableViewSource(TableView);
source.ItemsSource = firstViewModel.Items;
TableView.Source = source;
}
public class MessagesTableViewSource : MvxTableViewSource
{
public MessagesTableViewSource(UITableView tableView) : base(tableView)
{
tableView.RegisterClassForCellReuse(typeof(MessagesCell), new NSString("MessagesCell"));
}
protected override UITableViewCell GetOrCreateCellFor(UITableView tableView, NSIndexPath indexPath, object item)
{
return tableView.DequeueReusableCell("MessagesCell");
}
}
public class MessagesCell : MvxTableViewCell
{
public MessagesCell(IntPtr handle)
: base(handle)
{
var txt = new UILabel(new RectangleF(0, 0, 320, 44));
Add(txt);
this.DelayBind(() =>
{
this.CreateBinding(txt).Apply();
});
}
}
}
And this code runs fine...
I wouldn't completely trust the integration of Xamarin.iOS with the Immediate window - it is better now than it used to be, but I've seen several problems with it before.
Some things to possibly check:
does the above code work for you?
if it does, then what's in your BaseMessage and MessagesTableViewSource classes - perhaps they are causing the problem?
can you use Mvx.Trace("The list is {0}", messagesViewModel.Messages ?? "-null") to view the list? Can you use trace within the ViewModel property get - is it being called? Can you use trace within the ViewModel constructor?
are all your assemblies building against the same versions of things? Are all your assemblies definitely rebuilt? (Check "Build|Configuration Manager")- what version of Xamarin.iOS are you running in VS and in the Mac?
I want to use a third party view controller that already inherits from UIViewController (https://bitbucket.org/thedillonb/monotouch.slideoutnavigation/src/f4e51488598b/MonoTouch.SlideoutNavigation?at=master), how would I integrate that with MVVMCross?
I could just take the source and change it to inherit from MvxViewController, but guessing I will run into this with other libraries.
Do I need to implement all the interfaces MvxViewController does? IMvxTouchView? IMvxEventSourceViewController?
For this particular case, where you don't actually want to do any data-binding so you can just use a custom presenter - e.g. see #Blounty's answer, or see this project demo - https://github.com/fcaico/MvxSlidingPanels.Touch
If you ever do need to convert third party ViewController base classes so that they support data-binding, then the easiest way is exactly what you guessed:
inherit from them to provide an EventSource-ViewController
inherit from the EventSource-ViewController to add the Mvx BindingContext
This technique is exactly how MvvmCross itself extends each of UIViewController, UITableViewController, UITabBarController, etc in order to provide data-binding.
For example, see:
extending UIViewController to provide an eventsource - MvxEventSourceViewController.cs
extending the event source ViewController to provide a binding context - MvxViewController.cs
Note that because C# doesn't have any Multiple-Inhertiance or any true Mixin support, this adaption of ViewControllers does involve a little cut-and-paste, but we have tried to minimise this through the use of event hooks and extension methods.
If it helps, this iOS technique for a previous MvvmCross version was discussed in Integrating Google Mobile Analytics with MVVMCross (obviously this is out of date now - but the general principles kind of remain the same - we adapt an existing viewcontroller via inheritance)
In Android, a similar process is also followed for Activity base classes - see ActionBarSherlock with latest MVVMCross
You can use a custom view presenter like below, This is pretty much straight out of my app using the SlideOutNavigation.
public class Presenter
: IMvxTouchViewPresenter
{
private readonly MvxApplicationDelegate applicationDelegate;
private readonly UIWindow window;
private SlideoutNavigationController slideNavigationController;
private IMvxTouchViewCreator viewCreator;
public Presenter(MvxApplicationDelegate applicationDelegate, UIWindow window)
{
this.applicationDelegate = applicationDelegate;
this.window = window;
this.slideNavigationController = new SlideoutNavigationController();
this.slideNavigationController.SlideWidth = 200f;
this.window.RootViewController = this.slideNavigationController;
}
public async void Show(MvxViewModelRequest request)
{
var creator = Mvx.Resolve<IMvxTouchViewCreator>();
if (this.slideNavigationController.MenuView == null)
{
// TODO: MAke this not be sucky
this.slideNavigationController.MenuView = (MenuView)creator.CreateView(new MenuViewModel());
((MenuView) this.slideNavigationController.MenuView).MenuItemSelectedAction = this.MenuItemSelected;
}
var view = creator.CreateView(request);
this.slideNavigationController.TopView = (UIViewController)view;
}
public void ChangePresentation(MvxPresentationHint hint)
{
Console.WriteLine("Change Presentation Requested");
}
public bool PresentModalViewController(UIViewController controller, bool animated)
{
Console.WriteLine("Present View Controller Requested");
return true;
}
public void NativeModalViewControllerDisappearedOnItsOwn()
{
Console.WriteLine("NativeModalViewControllerDisappearedOnItsOwn");
}
private void MenuItemSelected(string targetType, string objectId)
{
var type = Type.GetType(string.Format("App.Core.ViewModels.{0}ViewModel, AppCore", targetType));
var parameters = new Dictionary<string, string>();
parameters.Add("objectId", objectId);
this.Show(new MvxViewModelRequest { ViewModelType = type, ParameterValues = parameters });
}
}
On iPhone, in Xcode, I can show a popup view which overlays everything, including the Tab Bar, etc, by using code like this -
[[[[UIApplication sharedApplication] delegate] window] addSubview:mySpecialView];
I'm trying to do the same in MonoTouch, and the code I'm using is this -
UIApplication.SharedApplication.Delegate.Window.AddSubview(mySpecialView);
...but this crashes. Does anyone have any idea what I'm doing wrong?
Thanks for any help.
You did not say how it crashed - but I assume you're having a ModelNotImplementedException while using the Window property since it's not implemented by default (and is meant for storyboard).
You can either implement it to return the window field of the (autogenerated) AppDelegate (AppDelegate.cs file) or expose the same variable as a (static) field.
E.g. the default generated code
UIWindow window;
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
window = new UIWindow (UIScreen.MainScreen.Bounds);
window.RootViewController = new UINavigationController ();
window.MakeKeyAndVisible ();
return true;
}
would become:
static UIWindow window;
public override bool FinishedLaunching (UIApplication app, NSDictionary options)
{
window = new UIWindow (UIScreen.MainScreen.Bounds);
window.RootViewController = new UINavigationController ();
window.MakeKeyAndVisible ();
return true;
}
static public UIWindow Window {
get { return window; }
}
I have QLPreviewController up and running but I'm using PresentModalViewController() to show the QLPreviewController directly. For reasons beyond explanation, I would like to have my own UIViewController which will create its own view and within that view I would like to use the QLPreviewController. Should be easy I thought, but the code below just does nothing. The QLPreviewControllers ViewDidAppear never gets called. (In my example below, PreviewController inherits from QLPreviewController and encapsulates delegate, preview item and source).
Can somebody explain what is wrong with the code below (besides the fact that it is pointless :-))?
Oh, yeah: in my test scenario, I present the controller below modally. It shows up but witout the preview.
public class OuterPreviewController : UIViewController
{
public OuterPreviewController (QLPreviewControllerDataSource oDataSource) : base()
{
this.oDataSource = oDataSource;
}
private PreviewController oPreviewController;
private QLPreviewControllerDataSource oDataSource;
public override void LoadView ()
{
this.View = new UIView();
this.View.Frame = new RectangleF(0, 0, 500, 500);
this.View.BackgroundColor = UIColor.Red;
}
public override void ViewDidAppear (bool animated)
{
// Code execution comes her. No errors, no issues.
base.ViewDidAppear (animated);
this.oPreviewController = new PreviewController();
this.oPreviewController.DataSource = this.oDataSource;
// Preview controller's view is added but it never shows up.
this.View.AddSubview(this.oPreviewController.View);
this.oPreviewController.View.Frame = this.View.Frame;
this.oPreviewController.View.Center = this.View.Center;
}
public override bool ShouldAutorotateToInterfaceOrientation (UIInterfaceOrientation toInterfaceOrientation)
{
return true;
}
}
Found a solution by coincidence today: all ReloadData() on the preview controller and magically it will show its contents.
This allows to add a QLPreviewController to an existing view as a subview and embed a preview. It also gets you rid of the toolbar which contains the open in menu.