How to determine height of UICollectionView with FlowLayout

ios height uicollectionview autolayout
Ignatius Tremor picture Ignatius Tremor · Dec 9, 2012 · Viewed 82.3k times · Source

I've got an UICollectionView with an UICollectionViewFlowLayout, and i want to calculate its content size (for return in intrinsicContentSize needed for adjusting its height via AutoLayout).

The problems is: Even if I have a fixed and equal height for all cells, I don't know how many "rows"/lines I have in the UICollectionView. I also can't determine that count by the number of items in my data source, since the cells representing the data items vary in width, so does consequently the number of items I have in one line of the UICollectionView.

Since I couldn't find any hints on this topic in the official documentation and googling didn't bring me any further, any help and ideas would be appreciated very much.

Answer

Ignatius Tremor picture Ignatius Tremor · Dec 9, 2012

Whoa! For some reason, after hours of research, I now found a pretty easy answer to my question: I was completely searching in the wrong place, digging through all the documentation I could find on UICollectionView.

The simple and easy solution lies in the underlying layout: Just call collectionViewContentSize on your myCollectionView.collectionViewLayout property and you get the height and width of the content as CGSize. It's as easy as that.

Related questions

Adjust UILabel height to text

I have some labels which I want to adjust their height to the text, this is the code I wrote for this now func heightForView(text:String, font:UIFont, width:CGFloat) -> CGFloat{ let label:UILabel = UILabel(frame: CGRectMake(0, 0, …

Read More
Change UITableView height dynamically

I want to change the height of my tableview from another viewcontroller based on the sum of its cells' heights, as they are dynamic. Is it at all possible? Thanks Add-on: What I basically have is a UserProfileViewController that has …

Read More
What is the height of iPhone's onscreen keyboard?

The height in portrait and the height in landscape measured in points.

Read More