Deselect selected options when tapped(selected) on last option in swift - ios

Question

Need a little help from you, I am working on Table View where I have an Array which is received from server. The Array is nothing but Multiple Choice Options. It looks something like this
a. Table
b. Bottle
c. Hat
d. Bucket
e. None of the Above.
What I Want ?
I want to select multiple answers i.e Table , Bottle , Bucket and it is shown by checkbox marked. Which I have managed to do it well. And when last option i.e None of the Above is selected I want to deselect all the above checked mark options and just show the None option checked, even this is working.
Where I am stuck?
When "None of the Above" is in selected mode and I tap on any other option then "None" should be deselected. This is not working , I don't know whats wrong here. Please help. TIA
Here's my didSelect Method
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
if selectedString == "None of the above" {
selectedIndex = indexPath.row
self.isNoneSelected = true
for index in tableView.indexPathsForSelectedRows!
{
tableView.deselectRowAtIndexPath(index, animated: true)
}
}
And my None option will always be at last position, so even array.lastobject will work I guess

Answer 1

You are making it too complicated here. All you need is an array of boolean to store the selected states, and reloadData() for the tableView, if you add an UIImageView to represent selected state.
It's not a good idea to call tableView.deselectRow() for every row directly
var selected = Array(repeating: false, count: 5)
func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) {
//let cell = whatever
cell.checkMark.isHidden = !selected[indexPath.row]
//return cell
}
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
selected[indexPath.row] = !selected[indexPath.row]
if (indexPath.row == selected.count - 1 ) {//if 'None' is selected
for i in 0..<selected.count-2 {
selected[i] = false
}
} else { //all other rows will deselect the 'None' row
selected[selected.count - 1 ] = false
}
tableView.reloadData()
}

Answer 2

Ok I can't be sure, but it looks like this code handles all selection events, right? If so, there appear to be several problems:
1) selectedIndex is only set if they select the last item. I suspect that is not what you want, but I cannot be sure.
2) same for self.isNoneSelected = true - I suspect you want to use this value in other methods to see if that is the selected item, but you don't seem to have any code to turn it off again.
3) you turn off the selection for all the other items, but don't turn on selection for "none" - but that might have already happened in the event, I don't see the rest of the code there.
So I think you want something like this:
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
selectedIndex = indexPath.row
if selectedString == "None of the above" {
self.isNoneSelected = true
for index in tableView.indexPathsForSelectedRows!
{
tableView.deselectRowAtIndexPath(index, animated: true)
}
} else {
self.isNoneSelected = false
//NOTE I AM NOT AT MY MACHINE SO I DON'T KNOW THE EXACT SYNTAX HERE
//THE IDEA IS TO GET THE INDEX PATH OF THE LAST ITEM SO WE CAN TURN IT OFF
tableView.deselectRowAtIndexPath(NSIndexPath.indexPathForRow(mydatasource.count-1, inSection:0), animated: true)
}
}