Ios – How to embed a UIViewController’s view from one xib inside a view in another xib

interface-builderiosiphoneuiviewuiviewcontroller

MyViewController.xib has File's Owner class set to MyViewController (a subclass of UIViewController) and File's Owner view connected to a UIView containing some subviews.

OtherViewController.xib has File's Owner class set to UIViewController and File's Owner view connected to an empty UIView.

Is it possible in Interface Builder to embed MyViewController's view inside the view in OtherViewController.xib?

I tried adding an instance of MyViewController into OtherViewController.xib, but I can't drop it inside the view (because it's not a UIView) and I can't get to the view that was associated with MyViewController in MyViewController.xib (only the view controller itself, and nothing it's connected to, makes it over to OtherViewController.xib).

Best Answer

You probably do not want to do this. Follow the warning in the View Controller Programming Guide:

Note: If you want to divide a view hierarchy into multiple subareas and manage each one separately, use generic controller objects (custom objects descending from NSObject) instead of view controller objects to manage each subarea. Then use a single view controller object to manage the generic controller objects.

A UIViewController subclass whose view does not fill the window will not behave as you might expect. It will not receive view controller lifecycle messages, rotation messages, or have its parentView/navigation/tabBarController properties set correctly.

A UITableViewCell should not be the view for a UIViewController. It might have some controller object responsible for managing its behavior (though I suspect this behavior can probably all be contained within the cell view itself) but that controller should not inherit from UIViewController.

Related Solutions

Ios – How to load custom UITableViewCells from Xib files

The right solution is this:

- (void)viewDidLoad
{
    [super viewDidLoad];
    UINib *nib = [UINib nibWithNibName:@"ItemCell" bundle:nil];
    [[self tableView] registerNib:nib forCellReuseIdentifier:@"ItemCell"];
}

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // Create an instance of ItemCell
    PointsItemCell *cell = [tableView dequeueReusableCellWithIdentifier:@"ItemCell"];

    return cell;
}

Ios – When is layoutSubviews called

I had a similar question, but wasn't satisfied with the answer (or any I could find on the net), so I tried it in practice and here is what I got:

init does not cause layoutSubviews to be called (duh)
addSubview: causes layoutSubviews to be called on the view being added, the view it’s being added to (target view), and all the subviews of the target
view setFrame intelligently calls layoutSubviews on the view having its frame set only if the size parameter of the frame is different
scrolling a UIScrollView causes layoutSubviews to be called on the scrollView, and its superview
rotating a device only calls layoutSubview on the parent view (the responding viewControllers primary view)
Resizing a view will call layoutSubviews on its superview (Important: views with an intrinsic content size will re-size if the content that determines their size changes; for example, updating the text on a UILabel will cause the intrinsic content size to be updated and thus call layoutSubviews on its superview)

My results - http://blog.logichigh.com/2011/03/16/when-does-layoutsubviews-get-called/

Best Answer

Related Solutions

Ios – How to load custom UITableViewCells from Xib files

Ios – When is layoutSubviews called

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