How to set custom collectionView Cell Frame? - ios

Question

I want first UICollectionViewCell by full width of screen and further UICOllectionViewCell is 2*2.
For that i have tried below code.
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return 2
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if indexPath.item == 0 {
let cell : FirstCell = collectionView.dequeueReusableCell(withReuseIdentifier: "FirstCell", for: indexPath) as! FirstCell
cell.layoutSubviews()
return cell
}
else {
let cell : SecondCell = collectionView.dequeueReusableCell(withReuseIdentifier: "SecondCell", for: indexPath) as! SecondCell
cell.layoutSubviews()
return cell
}
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
if indexPath.item == 0 {
let width = (UIScreen.main.bounds.size.width - 16)
return CGSize(width: width, height: 200)
}
else {
let width = (UIScreen.main.bounds.size.width - 24) / 2
let height = (UIScreen.main.bounds.size.width * 200) / 320
return CGSize(width: width, height: height)
}
}
But the Output comes as below.
Requirement: First Green Cell is of full Width and 2nd Yellow cell comes not from Center but it comes from left side and 3rd, 4th and so on cell comes 2*2
Any help will be appreciated.
Thanks in Advance.

Answer 1

To achieve this, you should take 3 section in collection view.
section 1 - 1 cell
section 2 - 1 cell (width should be less than half of available width for collection cell)
section 3 - number of cell you wanted
extension ViewController: UICollectionViewDelegate, UICollectionViewDataSource, UICollectionViewDelegateFlowLayout {
func numberOfSections(in collectionView: UICollectionView) -> Int {
return 3
}
func collectionView(_ collectionView: UICollectionView, numberOfItemsInSection section: Int) -> Int {
return section == 2 ? 4 : 1
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, insetForSectionAt section: Int) -> UIEdgeInsets {
return UIEdgeInsets(top: 10, left: 10, bottom: 10, right: 10)
}
func collectionView(_ collectionView: UICollectionView, layout collectionViewLayout: UICollectionViewLayout, sizeForItemAt indexPath: IndexPath) -> CGSize {
switch indexPath.section {
case 0:
return CGSize(width: UIScreen.main.bounds.width - 20, height: 200)
case 1:
return CGSize(width: (UIScreen.main.bounds.width - 30) / 2, height: 200)
default:
return CGSize(width: (UIScreen.main.bounds.width - 30) / 2, height: 200)
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "collectioncell", for: indexPath)
cell.backgroundColor = .red
return cell
}
}
Your view will look like: