Hello Andrew, This was asked on stackoverflow [1] recently. The workaround is to override only the default constructor and use the properties to set all values.
Not sure (yet) about the root cause, it's on my TODO but I got other bugs (without workarounds) to go thru before that. Feel free to open a bug report (less chance that I forget about it ;-) Sebastien [1] http://stackoverflow.com/questions/7692522/subclassed-uialertview-not-shown On Thu, Oct 20, 2011 at 5:07 PM, Andrew Young <andrewdyo...@gmail.com> wrote: > App crashes when I try to inherit from UIAlertView. See stack trace and > sample code below. MonoTouch 5.0. > Any ideas? I have a sample app that shows this for anyone interested. > public class ViewController : UIViewController > { > private DateTimePickerView _pickerView; > public ViewController () > { > } > public override void ViewDidLoad () > { > base.ViewDidLoad (); > new NotReachableAlertView ().Show (); > } > } > public class NotReachableAlertView : UIAlertView > { > public NotReachableAlertView() : base("Title", "Message", null, "Cancel") > { > } > } > Unhandled Exception: MonoTouch.Foundation.MonoTouchException: Objective-C > exception thrown. Name: NSInternalInconsistencyException Reason: Requesting > the window of a view (<PickerViewCrash.NotReachableAlertView: 0x79a700; > baseClass = UIAlertView; frame = (0 0; 0 0); transform = [0, 0, 0, 0, 0, 0]; > alpha = 0; opaque = NO; layer = (null)>) with a nil layer. This view > probably hasn't received initWithFrame: or initWithCoder:. > at MonoTouch.UIKit.UIAlertView.Show () [0x00000] in <filename unknown>:0 > at PickerViewCrash.ViewController.ViewDidLoad () [0x00006] in > /Users/Andrew/Projects/PickerViewCrash/ViewController.cs:20 > at MonoTouch.UIKit.UIWindow.MakeKeyAndVisible () [0x00000] in <filename > unknown>:0 > at PickerViewCrash.AppDelegate.FinishedLaunching > (MonoTouch.UIKit.UIApplication app, MonoTouch.Foundation.NSDictionary > options) [0x00031] in > /Users/Andrew/Projects/PickerViewCrash/AppDelegate.cs:32 > at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String > principalClassName, System.String delegateClassName) [0x00000] in <filename > unknown>:0 > at PickerViewCrash.Application.Main (System.String[] args) [0x00000] in > /Users/Andrew/Projects/PickerViewCrash/Main.cs:16 > [ERROR] FATAL UNHANDLED EXCEPTION: MonoTouch.Foundation.MonoTouchException: > Objective-C exception thrown. Name: NSInternalInconsistencyException > Reason: Requesting the window of a view > (<PickerViewCrash.NotReachableAlertView: 0x79a700; baseClass = UIAlertView; > frame = (0 0; 0 0); transform = [0, 0, 0, 0, 0, 0]; alpha = 0; opaque = NO; > layer = (null)>) with a nil layer. This view probably hasn't received > initWithFrame: or initWithCoder:. > at MonoTouch.UIKit.UIAlertView.Show () [0x00000] in <filename unknown>:0 > at PickerViewCrash.ViewController.ViewDidLoad () [0x00006] in > /Users/Andrew/Projects/PickerViewCrash/ViewController.cs:20 > at MonoTouch.UIKit.UIWindow.MakeKeyAndVisible () [0x00000] in <filename > unknown>:0 > at PickerViewCrash.AppDelegate.FinishedLaunching > (MonoTouch.UIKit.UIApplication app, MonoTouch.Foundation.NSDictionary > options) [0x00031] in > /Users/Andrew/Projects/PickerViewCrash/AppDelegate.cs:32 > at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String > principalClassName, System.String delegateClassName) [0x00000] in <filename > unknown>:0 > at PickerViewCrash.Application.Main (System.String[] args) [0x00000] in > /Users/Andrew/Projects/PickerViewCrash/Main.cs:16 > Terminating runtime due to unhandled exception > > _______________________________________________ > MonoTouch mailing list > MonoTouch@lists.ximian.com > http://lists.ximian.com/mailman/listinfo/monotouch > > _______________________________________________ MonoTouch mailing list MonoTouch@lists.ximian.com http://lists.ximian.com/mailman/listinfo/monotouch
