Collection View controller not adding as a subview

Question

i have a collection view controller if i add it as sub view as

YDCollectionViewCtr *collectionView = [self.storyboard instantiateViewControllerWithIdentifier:@"collectionview"];//collectionview
     collectionView.view.frame = CGRectMake(0, 154, 320, 300);
    collectionView.bussnessdic =bussinessphotoDic;
   [self.navigationController.view addSubview:collectionView.view];

or [self.view addSubview:collectionView.view];

than just a black screen is added

but when i push it it works perfectly..... I need to add it as subview. Any kind of help will be appreciable

Answer 1

[self addChildViewController: collectionView];

Answer 2

Try this

Just replace

[self.navigationController.view addSubview:collectionView.view];

to

[self.view addSubview:collectionView.view];

Answer 3

我认为您应该将collectionView添加为childViewController

Answer 4

I Faced this issue while working on my App.

you are not calling these methods.

[self.CollectionView.collectionViewLayout collectionViewContentSize];
[self.CollectionView reloadData];