Array: Swift and IOS - ios

Question

All,
Can you give me a source code of my below problem?
I have 100 user array and load that array value(username) in tableview.
Scenario:
When I click any tableviewcell, i store that value in new array( userArray) and also i have displayed right side discloser (checkmark).
But my problem is when i click again to deselect that user from tablecell my app has been crashed due to index out of bound.
I know problem is out of index, but how can i resolve that issue so if i click again on that tablecell it will remove user from userArray and i get new fresh userArray?
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let tagValue = 100 + indexPath.row
let cell: UITableViewCell = tableView.viewWithTag(tagValue) as UITableViewCell
if cell.accessoryType == UITableViewCellAccessoryType.None
{
cell.accessoryType = UITableViewCellAccessoryType.Checkmark
userToSendPost.append(self.users2[indexPath.row])
} else {
cell.accessoryType = UITableViewCellAccessoryType.None
let tempString = userToSendPost[indexPath.row] //tagvalue
let objcArray = userToSendPost as NSArray
let indexOfObject = objcArray.indexOfObject(tempString)
userToSendPost.removeAtIndex(indexPath.row)
}
}
sorry for my bad english.

Answer 1

You are approaching this incorrectly.
On the tableview set the property tableView.allowsMultipleSelection = true.
Then when you want to get the selected users...
let selectedIndexPaths = tableView.indexPathsForSelectedRows()
Then you can use the row property from those index paths to find the users.
var selectedUsers: [User] = []
for indexPath in selectedIndexPaths {
let user = theUsers[indexPath.row]
selectedUsers.append(user)
}
The multiple selection and the check mark is handled automatically by the tableview.

Answer 2

To follow your approach, I think this could help you ;)
But the approach of #Fogmeister is better !
func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {
let tagValue = 100 + indexPath.row
let cell: UITableViewCell = tableView.viewWithTag(tagValue) as UITableViewCell
if cell.accessoryType == UITableViewCellAccessoryType.None
{
cell.accessoryType = UITableViewCellAccessoryType.Checkmark
userToSendPost.append(self.users2[indexPath.row])
} else {
let tempUserString = self.users2[indexPath.row] // get your user string
if contains(userToSendPost, tempString) { // check if exist on your array
userToSendPost.removeObject(tempString) // remove it
}
cell.accessoryType = UITableViewCellAccessoryType.None
}
}
// If you want to use Array, add this method
extension Array {
mutating func removeObject<U: Equatable>(object: U) {
var index: Int?
for (idx, objectToCompare) in enumerate(self) {
if let to = objectToCompare as? U {
if object == to {
index = idx
}
}
}
if(index != nil) {
self.removeAtIndex(index!)
}
}
}