How to allow multiple UICollectionViewCells to be selected and deselected?
I have a UICollectionView (with .allowsMultipleSelection = true), and I want it so that whenever I tap on a cell, it changes color, and when I tap it again, it reverts to its old color. I understand that UICollectionViewCells have a isSelected property, so I've tried manipulating that to change the colors.
override var isSelected: Bool {
didSet {
if isSelected == false {
contentView.backgroundColor = .lightGray
roleLabel.textColor = .gray
} else {
contentView.backgroundColor = .gray
roleLabel.textColor = .black
print("selected")
}
}
}
My the view controller class that contains the collection view in question has defined didSelectItemAt. However, whenever I tap on the cell, "selected" is printed each time - meaning regardless of how many times I've tapped on the cell, it still sets isSelected to be true each time - and the color doesn't change. Why is this happening?
ios swift uicollectionview uicollectionviewcell
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
add a comment |
I have a UICollectionView (with .allowsMultipleSelection = true), and I want it so that whenever I tap on a cell, it changes color, and when I tap it again, it reverts to its old color. I understand that UICollectionViewCells have a isSelected property, so I've tried manipulating that to change the colors.
override var isSelected: Bool {
didSet {
if isSelected == false {
contentView.backgroundColor = .lightGray
roleLabel.textColor = .gray
} else {
contentView.backgroundColor = .gray
roleLabel.textColor = .black
print("selected")
}
}
}
My the view controller class that contains the collection view in question has defined didSelectItemAt. However, whenever I tap on the cell, "selected" is printed each time - meaning regardless of how many times I've tapped on the cell, it still sets isSelected to be true each time - and the color doesn't change. Why is this happening?
ios swift uicollectionview uicollectionviewcell
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
Can you make sure that, after selecting a cell A , then selecting another cell B, then trying to deselecting cell A works for you or not ?
– Ratul Sharker
Nov 25 '18 at 20:28
I tried that, it still keeps selecting A again.
– Kevin2566
Nov 25 '18 at 21:03
add a comment |
I have a UICollectionView (with .allowsMultipleSelection = true), and I want it so that whenever I tap on a cell, it changes color, and when I tap it again, it reverts to its old color. I understand that UICollectionViewCells have a isSelected property, so I've tried manipulating that to change the colors.
override var isSelected: Bool {
didSet {
if isSelected == false {
contentView.backgroundColor = .lightGray
roleLabel.textColor = .gray
} else {
contentView.backgroundColor = .gray
roleLabel.textColor = .black
print("selected")
}
}
}
My the view controller class that contains the collection view in question has defined didSelectItemAt. However, whenever I tap on the cell, "selected" is printed each time - meaning regardless of how many times I've tapped on the cell, it still sets isSelected to be true each time - and the color doesn't change. Why is this happening?
ios swift uicollectionview uicollectionviewcell
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
I have a UICollectionView (with .allowsMultipleSelection = true), and I want it so that whenever I tap on a cell, it changes color, and when I tap it again, it reverts to its old color. I understand that UICollectionViewCells have a isSelected property, so I've tried manipulating that to change the colors.
override var isSelected: Bool {
didSet {
if isSelected == false {
contentView.backgroundColor = .lightGray
roleLabel.textColor = .gray
} else {
contentView.backgroundColor = .gray
roleLabel.textColor = .black
print("selected")
}
}
}
My the view controller class that contains the collection view in question has defined didSelectItemAt. However, whenever I tap on the cell, "selected" is printed each time - meaning regardless of how many times I've tapped on the cell, it still sets isSelected to be true each time - and the color doesn't change. Why is this happening?
ios swift uicollectionview uicollectionviewcell
ios swift uicollectionview uicollectionviewcell
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
asked Nov 25 '18 at 20:06
Kevin2566Kevin2566
146
146
Can you make sure that, after selecting a cell A , then selecting another cell B, then trying to deselecting cell A works for you or not ?
– Ratul Sharker
Nov 25 '18 at 20:28
I tried that, it still keeps selecting A again.
– Kevin2566
Nov 25 '18 at 21:03
add a comment |
Can you make sure that, after selecting a cell A , then selecting another cell B, then trying to deselecting cell A works for you or not ?
– Ratul Sharker
Nov 25 '18 at 20:28
I tried that, it still keeps selecting A again.
– Kevin2566
Nov 25 '18 at 21:03
Can you make sure that, after selecting a cell A , then selecting another cell B, then trying to deselecting cell A works for you or not ?
– Ratul Sharker
Nov 25 '18 at 20:28
Can you make sure that, after selecting a cell A , then selecting another cell B, then trying to deselecting cell A works for you or not ?
– Ratul Sharker
Nov 25 '18 at 20:28
I tried that, it still keeps selecting A again.
– Kevin2566
Nov 25 '18 at 21:03
I tried that, it still keeps selecting A again.
– Kevin2566
Nov 25 '18 at 21:03
add a comment |
1 Answer
1
active
oldest
votes
you have to Store your selected cell in array.for example just store indexpath of selected Cell in Array than Check if indexpath is Already present in Array that means it is Already Selected.
var slectedCell = [IndexPath]()
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
slectedCell = slectedCell.filter { $0 != indexPath }
}
else {
slectedCell.append(indexPath)
cell.backgroundColor = UIColor.lightGray
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
}
else {
cell.backgroundColor = UIColor.lightGray
}
}
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
you have to Store your selected cell in array.for example just store indexpath of selected Cell in Array than Check if indexpath is Already present in Array that means it is Already Selected.
var slectedCell = [IndexPath]()
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
slectedCell = slectedCell.filter { $0 != indexPath }
}
else {
slectedCell.append(indexPath)
cell.backgroundColor = UIColor.lightGray
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
}
else {
cell.backgroundColor = UIColor.lightGray
}
}
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
add a comment |
you have to Store your selected cell in array.for example just store indexpath of selected Cell in Array than Check if indexpath is Already present in Array that means it is Already Selected.
var slectedCell = [IndexPath]()
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
slectedCell = slectedCell.filter { $0 != indexPath }
}
else {
slectedCell.append(indexPath)
cell.backgroundColor = UIColor.lightGray
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
}
else {
cell.backgroundColor = UIColor.lightGray
}
}
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
add a comment |
you have to Store your selected cell in array.for example just store indexpath of selected Cell in Array than Check if indexpath is Already present in Array that means it is Already Selected.
var slectedCell = [IndexPath]()
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
slectedCell = slectedCell.filter { $0 != indexPath }
}
else {
slectedCell.append(indexPath)
cell.backgroundColor = UIColor.lightGray
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
}
else {
cell.backgroundColor = UIColor.lightGray
}
}
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
you have to Store your selected cell in array.for example just store indexpath of selected Cell in Array than Check if indexpath is Already present in Array that means it is Already Selected.
var slectedCell = [IndexPath]()
func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
slectedCell = slectedCell.filter { $0 != indexPath }
}
else {
slectedCell.append(indexPath)
cell.backgroundColor = UIColor.lightGray
}
}
func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
if slectedCell.contains(indexPath) {
cell.backgroundColor = UIColor.gray
}
else {
cell.backgroundColor = UIColor.lightGray
}
}
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
answered Nov 27 '18 at 12:47
Bhavesh.iosDevBhavesh.iosDev
592215
592215
add a comment |
add a comment |
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Can you make sure that, after selecting a cell A , then selecting another cell B, then trying to deselecting cell A works for you or not ?
– Ratul Sharker
Nov 25 '18 at 20:28
I tried that, it still keeps selecting A again.
– Kevin2566
Nov 25 '18 at 21:03