insertRowAtIndexes watchKit Swift

Question

I have a struct

struct Question {
    var title: [String]
    var additionalInfo: String?
    var answers: [String]
}

and a variable to which i add the data

var questions = [
    Question(title: ["What is the color of?", "additional color information"], additionalInfo: nil, answers: [
        "Blue",
        "Gray"
        ])
]

This data loads up in a tableView on AppleWatch. Two row types are separated - TitleRowType (for titles array) and AnswersRowType (for answers array).

When i insert values into struct's array - i want to the rows in the tableView be inserted with animation.

I know that there's a insertRowAtIndexes function, but i cannot wrap my head around it. The example provided in Apple's documentation doesn't work for me. That's what i came up with:

    let indexSet = NSIndexSet(index: Int) // Int is passed via the function
    tableView.insertRowsAtIndexes(indexSet, withRowType: "TitleRowType")

but when i run it - the table doesn't update. Looking forward to your advices.

Answer 1

You have to do 3 steps:

1. Add the new data to your array
2. Insert a row into the table
3. Populate the row with the new data

Here is a simple example:

class InterfaceController: WKInterfaceController {

    @IBOutlet var table: WKInterfaceTable!
    var items = ["row1", "row2", "row3"]

    override func awakeWithContext(context: AnyObject?) {
        super.awakeWithContext(context)
        loadTable()
    }

    func loadTable() {
        table.setNumberOfRows(items.count, withRowType: "tableRow")
        var rowIndex = 0
        for item in items {
            if let row = table.rowControllerAtIndex(rowIndex) as? TableRowController {
                row.label.setText(item)
            }
            rowIndex++
        }
    }

    @IBAction func insertRow() {
        items.append("row4")
        let newIndex = items.count
        table.insertRowsAtIndexes(NSIndexSet(index: newIndex), withRowType: "tableRow")
        if let row = table.rowControllerAtIndex(newIndex) as? TableRowController {
            row.label.setText(items[newIndex])
        }
    }
}

TableRowController is a NSObject subclass that has one WKInterfaceLabel outlet to display the number of the row.

I used a button to trigger insertRow()