I'm wondering how to loop through all of my CollectionView Cells that currently visible.
In Objective C, I would achieve this concept seen below:
for(UICollectionView *cell in collectionView.visibleCells){
}
I've tried changing this into swift:
for cell:MyCollectionViewCell in self.collectionView.visibleCells() as cell:MyCollectionViewCell {
}
However I get the following error:
Type 'MyCollectionViewCell' does not conform to protocol 'SequenceType'
How do I loop through all my CollectionViewCells
They way you're using as
in that loop is trying to cast the array of visible cells to a single collection view cell. You want to cast to an array:
for cell in cv.visibleCells() as [UICollectionViewCell] {
// do something
}
or perhaps if you only have MyCollectionViewCell
instances, this will work:
for cell in cv.visibleCells() as [MyCollectionViewCell] {
// do something
}
In Swift 5:
There are five cells in section 0. Set each cells' backgroundcolor.
for row in 0..<collectionView.numberOfItems(inSection: 0){
let indexPath = NSIndexPath(row:row, section:0)
let cell:UICollectionViewCell = collectionView.cellForItem(at: indexPath as IndexPath) ?? cell
switch row {
case 0:
cell.backgroundColor = .red
case 1:
cell.backgroundColor = .green
case 2:
cell.backgroundColor = .blue
case 3:
cell.backgroundColor = .yellow
default:
cell.backgroundColor = .white
}
}
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