App Crash on Table Row load

Question

I'm pulling data in from CloudKit, and there is only one item in the data.

Once the matchup loads, and before the background color is seen in the UI, the app crashes. I can't figure out why, any ideas?

InterfaceController on Watch:

func loadTable() {
    self.rowTable.setNumberOfRows(self.matchupArray.count, withRowType: "rows")
    let rowCount = self.rowTable.numberOfRows

    for i in 0...rowCount  {
        let row = self.rowTable.rowController(at: i) as! Rows!
        row?.matchup.setText(self.matchupArray[i])
        let colorBackground = UIColor.init(hex: self.teamColorArray[i])
        row?.groupColor.setBackgroundColor(colorBackground)
    }

}

func getData() {
    cloud.getCloudKit { (game: [GameWatch]) in
        var teamColorArray = [String]()
        var matchupArray = [String]()

        for item in game {
            teamColorArray.append(item.teamColor)
            matchupArray.append(item.matchup)
        }

        self.teamColorArray = teamColorArray
        self.matchupArray = matchupArray

        self.loadTable()
    }

}

UPDATE:

Got a crash, with the error "fatal error: Index out of range".

I'm not sure why this is, because the matchupArray.count is 1, the rowCount is 1. It started iterating through the for-loop with i as 0, and finished the first iteration where it should have stopped since there was only 1 item. But I got the crash because it started to iterate through the loop again, with i as 1, and then obviously found nothing so it crashed.

The crash comes after row?.matchup.setText(self.matchupArray[i]) is run.

Answer 1

The error is in the line:

for i in 0...rowCount

This ... operator creates a range of indexes that includes both values when, because Swift uses 0-based arrays, you need the ..< operator to create a range that excludes the upper value.

This line should therefore be:

for i in 0..<rowCount