StackOverflow2013

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plurals

PO
primarykey
Id
19174452
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
0
CommunityOwnedDate
CreationDate
2013-10-04T06:09:15.957
FavoriteCount
0
LastActivityDate
2013-10-04T07:24:09.093
LastEditDate
2017-05-23T12:24:10.470
LastEditorUserId
-1
OwnerUserId
373321
ParentId
19171216
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
This sometimes happens for view controllers like table, tab bar and collection. It's caused, I think, by something in the Objective C base class <code>init</code> referencing the <code>View</code> - and thus triggering <code>ViewDidLoad</code> before the C# construction is fully complete. This is a bit like what can happen in 'pure' c# if a base class constructor references a virtual method. To check this is occurring for your app, put 2 breakpoints in your app - one in the ViewController constructor and one in ViewDidLoad - if ViewDidLoad is fired first, then you know this is the case. The only way around this I've found is to code around this by triggering a second ViewDidLoad call in the constructor. <pre><code> public FirstView() { // need this additional call to ViewDidLoad because UIkit creates the view before the C# hierarchy has been constructed ViewDidLoad(); } public override void ViewDidLoad() { base.ViewDidLoad(); if (ViewModel == null) return; // ... </code></pre> <hr> If it helps: <ul> <li>I believe I've talked about this in at least one N+1 - maybe N=25 - see <a href="https://github.com/MvvmCross/NPlus1DaysOfMvvmCross/blob/master/N-25-Tabbed/Tabbed.Touch/Views/FirstView.cs" rel="nofollow noreferrer">https://github.com/MvvmCross/NPlus1DaysOfMvvmCross/blob/master/N-25-Tabbed/Tabbed.Touch/Views/FirstView.cs</a> and <a href="http://mvvmcross.wordpress.com" rel="nofollow noreferrer">http://mvvmcross.wordpress.com</a></li> <li>The same type of thing happens in pure objective C code - eg see <a href="https://stackoverflow.com/questions/5620990/initialize-uitableviewcontroller-with-super-initwithstyleuitableviewstylegroup">initialize UITableViewController with [super initWithStyle:UITableViewStyleGrouped]</a></li> </ul>
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PostParentId
1. POMvxViewModelRequest is null in ViewDidLoad
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PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USCommunity
UserOwnerUserId
1. USStuart
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1. VO
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