CODEWITHSUNDEEP
iosarraysswiftuitableview
Fernando Resende
Fernando Resende

Reputation: 25

How to store an Array of selected rows?

In my code I have a table view that loads the name of users using my app. When a user selects a row it will appear a checkmark. What I want to do is save an array that contains all the selected rows (the array will contain the names). I found some information, but I still learning iOS programming and I dont know Obj-c.

This is what I have done so far:

var selectedMembers = [String]?
 func tableView(tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        return self.names?.count ?? 0
    }

    func tableView(tableView: UITableView, cellForRowAtIndexPath indexPath: NSIndexPath) -> UITableViewCell {
        let cell = tableView.dequeueReusableCellWithIdentifier("UserCell") as! UITableViewCell

        cell.textLabel!.text = names![indexPath.row]

        return cell
    }


func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath)
{
    selectedMembers = Array()
    if let cell = tableView.cellForRowAtIndexPath(indexPath) {

        if cell.accessoryType == .Checkmark
        {
            cell.accessoryType = .None

            self.selectedMembers?.remove(indexPath)

        }
        else
    {
        cell.accessoryType = .Checkmark
        self.selectedMembers?.append(indexPath)
        }
    }
}

Upvotes: 1

Views: 3884

Answers (2)

jherg
jherg

Reputation: 1696

You can use the didSelectRowAtIndexPath and didDeselectRowAtIndexPath delegate methods like so to keep track of the index paths in the table.

func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath) {

    selectedIndexPaths.append(indexPath)

}

func tableView(tableView: UITableView, didDeselectRowAtIndexPath indexPath: NSIndexPath) {

    if let index = find(selectedIndexPaths, indexPath) {
        selectedIndexPaths.removeAtIndex(index)
    }

}

Then you can backtrack and get the selected objects using the index paths.

Upvotes: 0

milo526
milo526

Reputation: 5083

To get the names you will need to use the selected row and get the entry of that row into your array with names.

To get the row of a indexpath you can use

indexPath.row

To get the name of your member you would use

names![indexPath.row-1]

Ofcourse you would save this to your array using

self.selectedMembers?.append(names![indexPath.row-1])

to remove the item you will need to add an extra step

self.selectedMembers?.removeAtIndex(selectedMembers.indexOf(names![indexPath.row-1]))

Upvotes: 2

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