I have embedded a collection view in another view and disabled the collection view's scrolling ability, what i want to achieve is similar to Instagram's profile tab. However, I cannot figure out how should I set the height of the collection view in this case since the number of cells are dynamic.
I tried searching different solutions but most results are on changing the cells dynamically but not the collection view height itself. Is there any default/standard solutions for that?
Set the width you want the collection view to have (hopefully that is static), and request a layout:
collectionView.frame = CGRectMake(0., 0., width, 0.); [collectionView layoutIfNeeded]; The calculated height of the collectionView will then be available at:
collectionView.contentSize.height 
For Swift please follow below steps:
Declare a CGFloat variable in declaration section:
var height : CGFloat! At viewDidAppear you can get it by:
height = self.myCollectionView.collectionViewLayout.collectionViewContentSize().height Maybe when you reload data then need to calculate a new height with new data then you can get it by: addObserver to listen when your CollectionView finished reload data at viewWillAppear:
override func viewWillAppear(animated: Bool) { super.viewWillAppear(true) .... .... self.shapeCollectionView.addObserver(self, forKeyPath: "contentSize", options: NSKeyValueObservingOptions.Old, context: nil) } Then add bellow function to get new height or do anything after collectionview finished reload:
override func observeValueForKeyPath(keyPath: String?, ofObject object: AnyObject?, change: [String : AnyObject]?, context: UnsafeMutablePointer<Void>) { let newHeight : CGFloat = self.myCollectionView.collectionViewLayout.collectionViewContentSize().height var frame : CGRect! = self.myCollectionView.frame frame.size.height = newHeight self.myCollectionView.frame = frame } And don't forget to remove observer:
self.myCollectionView.removeObserver(self, forKeyPath: "contentSize") I hope this will help you to solve your issue in swift.
1) you need to set height constraint to collectionview in storyboard or xibs
2) make outlet of heightConstraint
3) and use this code while relaod collectionview
collectionViewHeightConstaint.constant = collectionView.contentSize.height In your ViewController, set the frame of the collectionView. For example:
self.collectionView.frame = CGRectMake(0, 0, 100, 200); 
Based on the fact you know the height of the cells and you know the number of cells on the screen. I would...
self.collectionView.frame = CGRectMake(0, 0, DEFINED_WIDTH, DEFINED_CELL_HEIGHT*Number of Cells); or have I miss understood the question?
