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    <p>Hi this was a tough issue for me too until i saw this idea: <a href="http://www.hanspinckaers.com/custom-action-on-back-button-uinavigationcontroller" rel="nofollow">http://www.hanspinckaers.com/custom-action-on-back-button-uinavigationcontroller</a></p> <p>When both the NavigationController and the TopViewController have the same orientation then IOS creates the following call sequence using the below code(monotouch)</p> <ul> <li>SomeTopViewController ViewWillDisappear </li> <li>WillShowViewController viewController: the new TopViewController</li> <li>SomeTopViewController ViewDidDisappear</li> <li>DidShowViewController viewController: the new TopViewController</li> </ul> <p>When the NavigationController and the TopViewController have <strong>different</strong> orientations then the NavigationController delegate is <strong>not</strong> called as you described. The call sequence is therefore:</p> <ul> <li>SomeTopViewController ViewWillDisappear </li> <li>SomeTopViewController ViewDidDisappear</li> </ul> <p>The following code reproduce the ios call sequence by overriding the NavigationController' PopViewControllerAnimated:</p> <pre><code>public class MyNavigationControllerDelegate : UINavigationControllerDelegate { public MyNavigationControllerDelegate( ) : base() {} public bool WasCalled {get;set;} // flag that we use to track whether iOS calls the handlers or we have to public override void WillShowViewController( UINavigationController navigationController, UIViewController viewController, bool animated ) { Console.WriteLine( "WillShowViewController viewController: {0}", viewController.GetType() ); WasCalled = true; // signal that we have been called //.….. do your stuff } public override void DidShowViewController( UINavigationController navigationController, UIViewController viewController, bool animated ) { Console.WriteLine( "DidShowViewController viewController: {0}", viewController.GetType() ); //.….. do your stuff } } public partial class MyNavigationController : UINavigationController { MyNavigationControllerDelegate navigationControllerDelegate; public override void ViewDidLoad() { base.ViewDidLoad(); navigationControllerDelegate = new MyNavigationControllerDelegate( viewSelectionControl ); Delegate = navigationControllerDelegate; } public override UIViewController PopViewControllerAnimated( bool animated ) { Console.WriteLine( "PopViewControllerAnimated TopViewController.GetType: {0}", TopViewController.GetType() ); navigationControllerDelegate.WasCalled = false; // reset flag before we start the popsequence UIViewController ctrl = base.PopViewControllerAnimated( animated ); AppDelegate.MainWindow.BeginInvokeOnMainThread( delegate { if( !navigationControllerDelegate.WasCalled ) { // if iOS did not call the delegate handler then we must do it Delegate.WillShowViewController( this, TopViewController, animated ); navigationControllerDelegate.WasCalled = false; // reset flag to be used in the next DidShowViewController step of the popsequence } } ); Thread t = new Thread( () =&gt; RunPop(animated) ); tt.Start(); return ctrl; } void RunPop(bool animated) { Thread.Sleep( 500 ); AppDelegate.MainWindow.BeginInvokeOnMainThread( delegate { if( !navigationControllerDelegate.WasCalled ) { // if iOS did not call the delegate handler then we must do it Delegate.DidShowViewController(this,TopViewController,animated); } } ); } </code></pre> <p>}</p>
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    1. POUINavigationControllerDelegate methods not called (demo code on github)
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    1. USKaspar
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    1. COwhat is this language ? Obj-C++ ?? I'm translating now...
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      1. USmalaba
    2. COIt's C#, using MonoTouch.
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      1. USJacob Relkin
 

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