Add a CollectionViewController as ChildViewController to a UIView - ios

Question

I am trying to create a view which contains three subview having different view controller (UICollectionViewController,pageviewcontroller and uiviewcontroller).
i am able to add a uiviewcontroller but other two controller is not allowed.
I am getting this error.....
Incompatible pointer types sending 'UICollectionView *__weak' to parameter of type 'UIViewController *'
Is their any way to add these controller to my subview?

Answer 1

I don't know why you want to add ViewControllers inside a view, i never need it.
I tried to do that, if can help you this is my running code:
ViewController.h
#import <UIKit/UIKit.h>
#interface ViewController : UIViewController
#property (nonatomic, retain) UICollectionViewController *collectionViewController;
#property (nonatomic, retain) UIPageViewController *pageViewController;
#property (nonatomic, retain) UIViewController *simpleViewController;
#end
ViewController.m
#import "ViewController.h"
#interface ViewController ()
#end
#implementation ViewController
#synthesize collectionViewController;
#synthesize pageViewController;
#synthesize simpleViewController;
- (void)viewDidLoad
{
[super viewDidLoad];
UICollectionViewLayout *layout = [[UICollectionViewLayout alloc] init];
collectionViewController = [[UICollectionViewController alloc] initWithCollectionViewLayout:layout];
pageViewController = [[UIPageViewController alloc] init];
simpleViewController = [[UIViewController alloc] init];
// Do your stuff with this controllers
[self.view addSubview:collectionViewController.view];
[self.view addSubview:pageViewController.view];
[self.view addSubview:simpleViewController.view];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#end

Answer 2

You don't add view controllers to views. You add views to views (as subviews) and, much more rarely, controllers to controllers (as child controllers).
Think of them as two parallel hierarchies: Given ControllerA that controls view ViewA, you want to make ControllerB a child controller of ControllerA such that it's view, ViewB is a subview of ViewA.
See the WWDC 2011 video: "Implementing UIViewController Containment"