问题
(Designed in storyboard , screenshot below) I have two subviews on my rootviewcontroller's view
In my code i want to assign a separate view controller to each subview. i.e Assign a tableViewController to the TableView.
I tried to do this in awakeFromNib (or ViewDidLoad) method but to no avail. The delegate method in my tableview controller are never called. I think storyboard does the job of loading the subviews here even before the tableviewcontroller i assign can do something.
self.myTableViewController = (TodoListViewController *)[[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
self.myTableView.delegate = self.myTableViewController;
self.myTableView.dataSource = self.myTableViewController;
self.myTableViewController.tableView = self.myTableView;
I am not sure if this is allowed when having views like this in storyboard or i am doing anything wrong ?
回答1:
I came to this site as I had a similar problem. Actually I am doing the exact same thing: I have a viewcontroller with two subviews (all defined in a storyboard with lots of constraints).
in the containerviewcontroller in viewDidLoad I am doing the same calls as you do (but I defined the view first):
self.myTableViewController = (TodoListViewController *)[[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
self.myTableViewController.tableView = self.myTableView;
self.myTableView.delegate = self.myTableViewController;
self.myTableView.dataSource = self.myTableViewController;
That works for me (I guess, here is your problem: You don't have a navigation controller around it.... and be sure that the outlets of your tableview are really connected in the storyboard.).
But the real problem comes after the correct wiring. If you tab into a cell, you probably want to give some cellID to the nextView. As you have defined your tableviewcontroller manually, only your delegate method didSelectRowAtIndexPath gets called, but not the prepareForSegue.
I have played around with instantiating the viewcontroller from the storyboard
UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"aStoryboard" bundle:nil];
self.myTableViewController = [storyboard instantiateViewControllerWithIdentifier:@"myTableViewID"];
but the segue did not get called. calling it directly (performSegueWithIdentifier:...) did not work as this tableviewcontroller is not managed by a navigation controller.
For me it ended up that the prepareForSegue method gets called in the containerViewController which can delegate the calls to its subviewcontrollers.
EDIT: Actually the real solution is DON'T. There is a "Container View" object which can be added to a view and defines a region of a view controller that can include a child view controller. This is what I really wanted to do.
回答2:
Try again with your viewDidLoad method, that is the simplest answer. If the method is not loading you may have to look into the other things inside you method because if the application is large as they often are using storyboards you may have conflicting methods.
I would also look at this: http://blog.waynehartman.com/archive/2012/01/07/uistoryboard-on-ios-5-the-good-the-bad-and-the.aspx
It shows the most common accidents people make when using any storyboard function programatically
Hope that helps!
回答3:
Sounds like you want to write yourself a custom container controller, e.g. similar to UISplitViewController. Here's apple's brief docs on doing this in the UIViewController class reference. You could for example instantiate the children controllers programmatically in your container controller's viewDidLoad: or viewWillAppear: methods. I don't think you can get IB to instantiate the children for you, though, in the same way you can wire up say a tab bar or navigation controller's relationships to their children. (If there is a way, I'd like to know!)
回答4:
It's typically easiest to set your classes and delegates all in the storyboard (as shown in numerous totorials including this one).
If you're really trying to put a scroll view and table view into the same view, then you'll need to look into UIViewController instantiateViewControllerWithIdentifier:, you can reasonably easily pull multiple view controllers (ideally with their proper classes, delegates and sources set in the storyboard) in and add their views to your outer wrapper view. I will say that I've done this and you can do cool things with it reasonably easily, but it usually isn't the cleanest way to do things.
来源：https://stackoverflow.com/questions/11384088/how-to-set-view-controller-programmatically-for-subview-in-storyboard