ios - UICollectionViewCell dynamic height depending on UITextView font lineHeight -


i trying implement collection view cells having dynamic height.

some of collection view cells contains uitextview, uitextviews have height configured : 

    [textviewheightconstraint setconstant: numberofrowstodisplay * [[textview font] lineheight]];

the textview subview of view in specific .xib, xib view added subview of cell when cell dequeued (when collectionview:cellforitematindexpath: called).

but need return height of cell in "collectionview:sizeforitematindexpath:" method cell instance not accessible, cannot access textview : [[textview font] lineheight] property.

how can solve ?

ps : textview empty, height not dependent of nsstring on can call sizewithfont: method, , cannot hard code textview height. "numberofrowstodisplay" retrieved @ runtime, , textview font not hardcoded too.

edit : tried call "dequeuereusablecellwithreuseidentifier:forindexpath:" in "collectionview:sizeforitematindexpath:" method, creates infinite loop, if calling "collectionview:cellforitematindexpath:".

you need set view controller delegate flow layout class.

see here: uicollectionviewdelegateflowlayout protocol reference


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