Uncheck UITableview custom checkbox option in Swift - ios

Question

I am trying to make a custom checkbox list using the UITableview that allows single selections (I should however be able to select as many options as I want) and a custom UITableCell.
My custom cell contains a Label and an ImageView and all I want is to change the image contained in the IV on tap.
I am able to change the image from unchecked to checked in my didSelectRowAtIndexPath without a problem but I am having problems changing it back from checked to unchecked.
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
print("tableView -> didSelectRowAtIndexPath")
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! CustomCellVC
cell.backgroundColor = UIColor.clearColor()
cell.ivRiskCellImage.image = UIImage(named: "CheckedBox")
}
I tried to play with the highlighted state of the ImageView by adding the checkedbox image as the highlighted image and then turning it on and off but it only enters the if but ignores the if else if clicked again
if(cell.ivCellImage.highlighted == false)
{
print("Highligth is OFF")
cell.ivCellImage.highlighted = true
}
else if(cell.ivCellImage.highlighted == true)
{
print("Highligth is ON")
cell.ivCellImage.highlighted = false
}
as well as checking what image is inside the IV, this if-else block being completely ignored
if(cell.ivRiskCellImage.image!.isEqual(UIImage(named: "UncheckedBox")))
{
print("Is unchecked!")
cell.ivRiskCellImage.image = UIImage(named: "CheckedBox")
}
else if(cell.ivRiskCellImage.image!.isEqual(UIImage(named: "CheckedBox")))
{
print("Is checked!")
cell.ivRiskCellImage.image = UIImage(named: "UnheckedBox")
}
Moreover, when I manage to display the checkedbox image on click I get something like this
while if I try setting the checked box for all the cells in cellForRowAtIndexPath by adding this
cell.ivRiskCellImage.image = UIImage(named: "CheckedBox")
the checkbox tick is no longer semitransparent but white, as it should be
Any ideas? I spent quite some time trying to solve this without any luck.

Answer 1

Instead of let cell = tableView.dequeueReusableCellWithIdentifier... I would use
let cell = tableView.cellForRowAtIndexPath(indexPath) as! CustomCellVC
This way you get a reference to the cell you want to change the image in. tableView.dequeueReusableCellWithIdentifier is meant to be used in delegate method tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) when you want to recycle your cells for better performance.
Also cell.ivRiskCellImage.image!.isEqual(UIImage(named: "UncheckedBox")) doesn't work, because UIImage(named: "UncheckedBox") creates a new UIImage, which isn't the same as the UIImage you want to check it against.

Answer 2

As fat i understand that you want to change image form Check and Uncheck and vice versa
There is mainly two methods of table view delegate
– tableView:didDeselectRowAtIndexPath:
– tableView:didSelectRowAtIndexPath:
reference link : https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITableViewDelegate_Protocol/#//apple_ref/occ/intfm/UITableViewDelegate/tableView:didDeselectRowAtIndexPath:
Although you can do same thing in – tableView:didDeselectRowAtIndexPath:
func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath)
{
print("tableView -> didSelectRowAtIndexPath")
let cell = tableView.dequeueReusableCellWithIdentifier(cellIdentifier, forIndexPath: indexPath) as! CustomCellVC
cell.backgroundColor = UIColor.clearColor()
cell.ivRiskCellImage.image = UIImage(named: "**unCheckedBox**")
}