Get table view size of child view controller - ios

Question

In viewDidLoad of my child view controller (UITableViewController) I'm getting the contentSize.Height after calling layoutIfNeeded. Than I set the preferredContentSize with these values. In viewDidLoad of my container (which holds this child) I also set the preferredContentSize based on the child's preferredContentSize. This works on iOS 8 but not on iOS 7.
I know that the viewDidLoad of the child view controller is called after the viewDidLoad of the container.
How do I get the table view size of the child or how can I force that the child view has layout its subviews before the container has?

Answer 1

You can try sending the layout request after all views have loaded:
// In the container
-(void) viewDidLoad {
// ...
[self.view performSelector:#selector(setNeedsLayout) withObject:nil afterDelay:0];
}

Answer 2

I ended up with the following:
In the child view controller I created a separate method which takes the values for the table view. Afterwards I set the preferred content size.
public void setDocumentList(List<string> documentList){
this.documentList = documentList;
this.TableView.ReloadData ();
// adjust size for popover
float height = TableView.ContentSize.Height;
if (this.View.Bounds.Height > 0) {
// limit the max size of the popover
height = Math.Min (this.View.Bounds.Height, height);
}
this.PreferredContentSize = new SizeF (320f, height);
}
In my container I have a similar function, but here I only set the preferred content size.
public void setDocumentList(List<string> documentList){
documentListController.setDocumentList (documentList);
this.PreferredContentSize = documentListController.PreferredContentSize;
// some autolayout constraints ...
}
This kind of works. I get the correct values, but the values of the popover are not correct in the beginning. If someone is wondering this is the C# language. I'm still open for better solutions.

Answer 3

You can load the tableView of the child by calling viewDidLoad of the child in the parent, and forcing the tableview to layout.
// Parent.m
[Child view];
[self layoutParentViewsOrDoSomething];
// Child.m
-(void)viewDidLoad{
[super viewDidLoad];
[self layoutSubviews];
// or [tableView reloadData]...
}