如何根据 ios 中的集合视图行数使滚动视图增长？

Question

i have a scrollview which has a picture, text, button, label and then a collectionView whose number of rows is dynamic in nature. Its like collectionview will grow in height and hence the scrollview should assume collectionView height as well as other elements height to get a smooth scroll. How to achieve this using auto Layout in ios?

So my doubt is how to make a dynamic scrollview height based on a growing colelctionview or tableview height.

Answer 1

You can increase the height of CollectionView Height Constraint , connect Height contains to your ViewController and than .

how to connect constraint to outlet ?

let height = self.collectionView.contentSize.height;
self.heightConstraints = height;

self.scrollView.contentSize = CGSize.init(widht:self.scrollView.frame.size.width,height:height)

Answer 2

FOr Swift 4.2

override func viewDidLayoutSubviews() {
    let heightFilterCOll = self.filterCollectionView.contentSize.height
    self.filterCOllectionViewCOnstraintHeight.constant = heightFilterCOll

    self.ScrollView.contentSize = CGSize(width:self.ScrollView.frame.size.width,height:heightFilterCOll + 77)
}

Answer 3

These methods didn't work for me. Try,

self.collectionView.reloadData()
DispatchQueue.main.async {
    self.heightCollectionViewConstraint.constant = self.collectionViews.collectionViewLayout.collectionViewContentSize.height
}

Answer 4

@ Wimukthi Rajapaksha

try his solutions its working perfectly. Just keep in mind to specify a height of collection in scroll view. create an outlet of the height constant. Reload table and assign the dynamic height. Thanks.