The issue I am facing is thrown on only one device out of several test devices. All devices are iPhone 4s iOS 5.1.1 with another with iOS 6.0.1.
There are several answers to similar questions but none contain both symptoms.
The application has been written in Monotouch.
The symptoms of the issue are
The application will not change orientation on the affected device. An NSInvalidArgumentException is thrown when accessing certain views on the affected device.
The full exception is:
Objective-C exception thrown. Name: NSInvalidArgumentException Reason: -[UITableViewCell updateConstraintsIfNeeded]: unrecognized selector sent to instance 0x4e07540
The Stack Trace is
MonoTouch.Foundation.MonoTouchException: Objective-C exception thrown. Name: NSInvalidArgumentException Reason: -[UITableViewCell updateConstraintsIfNeeded]: unrecognized selector sent to instance 0x4c3cc20 at MonoTouch.UIKit.UIView.UpdateConstraintsIfNeeded () [0x00010] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIView.g.cs:1626 at XXXXXX.IOS.Dialogs.NewStyledMultilineElement.GetCell (MonoTouch.UIKit.UITableView tv) [0x0000f] in /Users/gavin/Perforce/Jon_PI-151_9051/XXXXXX/XXXXXX/v1.3.1/Mobile/XXXXXX/IOS/XXXXXX.Dialogs/My Work/WorkDetailDialogController.cs:30 at MonoTouch.Dialog.DialogViewController+Source.GetCell (MonoTouch.UIKit.UITableView tableView, MonoTouch.Foundation.NSIndexPath indexPath) [0x00029] in /Developer/MonoTouch/Source/MonoTouch.Dialog/MonoTouch.Dialog/DialogViewController.cs:340 at MonoTouch.UIKit.UIApplication.Main (System.String[] args, System.String principalClassName, System.String delegateClassName) [0x0004c] in /Developer/MonoTouch/Source/monotouch/src/UIKit/UIApplication.cs:38 at XXXXXX.IOS.Application.Application.Main (System.String[] args) [0x00000] in /Users/gavin/Perforce/Jon_PI-151_9051/Pall/XXXXXX/v1.3.1/Mobile/XXXXXX/IOS/XXXXXX.Application/Main.cs:28
The code that is causing the exception is
public class NewStyledMultilineElement : StyledMultilineElement
{
public override UITableViewCell GetCell (UITableView tv)
{
UITableViewCell cell = base.GetCell(tv);
cell.SelectionStyle = UITableViewCellSelectionStyle.None;
cell.UpdateConstraintsIfNeeded();
return cell;
}
public NewStyledMultilineElement(string caption, string value) :base(caption,value)
{
}
}
The line that is throwing the error is cell.UpdateConstraintsIfNeeded();
The version information is
MonoDevelop 3.0.5 Runtime Mono 2.10.9 GTK 2.24.10 XCode 4.5.1 Monotouch 6.0.6
The settings on the affected device have been compaired to other devices that function as expected, with no obvious differences.
It is possible that the symptoms are for different issues. However, this is the only acception that is thrown.
Any help would be greatly appreciated
Further investigation has resolved the issue, temporarily. However the root cause has not been confirmed. The solutions are as follows
To resolve the orientation symptom, the following code was added to the base view controller from which all view controllers are dervied.
public override bool ShouldAutoRotateToInterfaceOrientation(UIInterfaceOrientation toInterfaceOrientation)
{
return true;
}
To resolve the NSInvalidArgumentException, StyledMultilineElement have been used instead of the derived class. This issue could be being caused by the GC, but varification of that would be appreciated.
The solutions solve the issue, without identifying the root causes. Any explination of why this is happening on only one device and not all would be helpful.