the first thing I'd try is to move the declaration "var ppvc" from your local scope and declare it at the class level instead.
On Thu, Aug 18, 2011 at 7:02 AM, John Murray <[email protected]> wrote: > I downloaded monotouch 4 and 2.8 of MD this morning after a prompt from MD > **** > > ** ** > > My app has a view which requires user to enter name and address info **** > > It has a button which allows user to pick from the contacts list **** > > Code lifted straight from Wally B’s book **** > > It’s worked fine until now – I mean last night fine – this morning after > upgrade No **** > > ** ** > > It is undebuggable – cannot even get to a break point simply drops out with > green line at UIApplication.Main(args)**** > > As I say I’ve not changed code overnight.**** > > The trace shows it failing on monotouch.utils.backingField.get **** > > In developer/monotouch/source/monotouch/src/utils/backingField.cs line 47* > *** > > ** ** > > I’d be the first to admit my code is not exactly expert – I do hope this is > a fault in the new version rather than I have to go to college for 10 years > to discover how to do it properly as every new developer tool/evolution > seems to get more complicatedJ **** > > ** ** > > It seem simple enough – I cant imagine what I am doing wrong and why it > only comes out now after the upgrade**** > > ** ** > > A button calls **** > > **- **paxViewController.PresentModalViewController(ppvc,true) ;** > ** > > the ppvc is declared like this **** > > ** ** > > var ppvc = new ABPeoplePickerNavigationController();**** > > ** ** > > and then it has a few override methods e.g. **** > > ppvc.SelectPerson+=delegate(object > sender,ABPeoplePickerSelectPersonEventArgs e)**** > > {**** > > //do something **** > > //dismiss modal **** > > paxViewController.DismissModalViewControllerAnimated(true);**** > > };**** > > ** ** > > And that’s all there is to it - as I say it doesn’t even get to these > lines – on touching the contact (any contact) to select it drops out with > nullreference exception**** > > And no clue as to what is causing it **** > > are there changes in monotouch4 which mean I have to do things differently? > **** > > ** ** > > Desperate for help here – completely out of my depth.**** > > ** ** > > Tia **** > > John Murray **** > > _______________________________________________ > MonoTouch mailing list > [email protected] > http://lists.ximian.com/mailman/listinfo/monotouch > >
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