iOS Charts 3 - Align X Labels (dates) with plots

Hi, My chart lines are offset by about 2 days for some reason. I have found a few potential fixes, but none have worked. I think it could be to do with my data structure.

I have an array made up of individual arrays, each for its own line in the chart. this is then made up of multiple structs for the plot points of that line.

My issue is that values/lines are correct, but are not aligning correctly with the dates. In the example below. the dates start at 3rd May and end 8th May. Please help

here is my code

```
func setupLineChart() {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd"
var dataSets:[LineChartDataSet] = []
var color:[UIColor] = [UIColor.red,UIColor.blue, UIColor.green,UIColor.red,UIColor.red,UIColor.red,UIColor.red]
for i in sets { //Array of array of structs
let sort = i.sorted { // sort the internal array by date
item1, item2 in
let date1 = dateFormatter.date(from:item1.date)
let date2 = dateFormatter.date(from:item2.date)
return date1!.compare(date2!) == ComparisonResult.orderedAscending
}
var dataEntries: [ChartDataEntry] = []
for stat in 0...(sort.count - 1) {
let date = dateFormatter.date(from:sort[stat].date)
let timeIntervalForDate: TimeInterval = date!.timeIntervalSince1970
let dataEntry = ChartDataEntry(x: Double(timeIntervalForDate), y: sort[stat].total)
dataEntries.append(dataEntry)
if stat == (sort.count - 1){
let chartDataSet = LineChartDataSet(values: dataEntries, label: "\(sort[stat].exercise)")
chartDataSet.setCircleColor(color[stat])
chartDataSet.setColor(color[stat], alpha: 1.0)

chartDataSet.drawValuesEnabled = true
dataSets.append(chartDataSet)
startChart(dataSets: dataSets)
}
}
}

}

func startChart(dataSets:[LineChartDataSet]){
testLineChartView.animate(xAxisDuration: 0.7, yAxisDuration: 0.7)
testLineChartView.dragEnabled = true
testLineChartView.legend.form = .circle
testLineChartView.drawGridBackgroundEnabled = false

let xaxis = testLineChartView.xAxis
xaxis.valueFormatter = axisFormatDelegate
xaxis.labelCount = dataSets.count
xaxis.granularityEnabled = true
xaxis.granularity = 1.0
xaxis.centerAxisLabelsEnabled = true
xaxis.avoidFirstLastClippingEnabled = true
xaxis.drawLimitLinesBehindDataEnabled = true

let rightAxis = testLineChartView.rightAxis
rightAxis.enabled = false

let leftAxis = testLineChartView.leftAxis
leftAxis.drawZeroLineEnabled = true
leftAxis.drawGridLinesEnabled = true
axisFormatDelegate = self
testLineChartView.delegate = self

let chartData = LineChartData(dataSets: dataSets)
testLineChartView.data = chartData
testLineChartView.chartDescription?.text = ""
}

extension ChartViewController: IAxisValueFormatter {
func stringForValue(_ value: Double, axis: AxisBase?) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd MMM"
let date = Date(timeIntervalSince1970: value)
return dateFormatter.string(from: date)
}
}
```