3.0.5 Bar chart xAxis valueFormatter regression - no data points shown.

[rl-pavel]

I've recently updated my dependencies and noticed that the data points on my bar chart's X axis are gone. After some digging, this seems like a regression since 3.0.4.

The reason I think it's due to valueFormatting is because if I comment out this line:

barChart.xAxis.valueFormatter = IndexAxisValueFormatter(values: chartData.dataPoints)

the indexes of each bar are still showing.

Here are a few screenshots:

---

Here's my chart configuration, in case it affects anything:

barChart.delegate = self

// Left axis configurations
barChart.leftAxis.drawAxisLineEnabled = false
barChart.leftAxis.setLabelCount(4, force: true)
barChart.leftAxis.labelFont = UNFont.font(with: UNFontSize11, type: UNFontTypeRegular)
barChart.leftAxis.labelTextColor = UNColor.whiteColor().withAlphaComponent(0.5)
barChart.leftAxis.gridColor = UNColor.blueLightColor()
barChart.leftAxis.axisMinimum = 0
barChart.leftAxis.valueFormatter = UNYAxisValueFormatter()

// Right axis configurations
barChart.rightAxis.drawAxisLineEnabled = false
barChart.rightAxis.drawGridLinesEnabled = false
barChart.rightAxis.drawLabelsEnabled = false

// X axis configurations
barChart.xAxis.granularityEnabled = true
barChart.xAxis.granularity = 1
barChart.xAxis.drawAxisLineEnabled = false
barChart.xAxis.drawGridLinesEnabled = false
barChart.xAxis.labelFont = UNFont.font(with: UNFontSize11, type: UNFontTypeRegular)
barChart.xAxis.labelTextColor = UNColor.whiteColor().withAlphaComponent(0.5)
barChart.xAxis.labelPosition = .bottom

// Other configurations
barChart.highlightPerDragEnabled = false
barChart.chartDescription?.text = ""
barChart.legend.enabled = false
barChart.pinchZoomEnabled = false
barChart.doubleTapToZoomEnabled = false
barChart.scaleYEnabled = false

// Marker configuration
_tooltipView.chartView = barChart
barChart.marker = _tooltipView
// Initially false to highlight the last value without showing the marker
barChart.drawMarkers = false

barChart.snp.make(.all, .equalToSuperview)
backgroundColor = .clear

---

And here's how I configure the data:

// Prevent from setting an empty data set to the chart (crashes)
guard chartData.dataPoints.count > 0 else { return }

var dataEntries = [BarChartDataEntry]()

for i in 0..<chartData.dataPoints.count {
	let entry = BarChartDataEntry(x: Double(i), y: chartData.dataValues[i])
	dataEntries.append(entry)
}

let barChartData = BarChartData()

let barChartDataSet = BarChartDataSet(values: dataEntries, label: "")
barChartDataSet.drawValuesEnabled = false
barChartDataSet.colors = [UNColor.blueLightColor()]
barChartDataSet.highlightColor = UNColor.whiteColor()
barChartDataSet.highlightAlpha = 1

barChartData.addDataSet(barChartDataSet)
barChartData.barWidth = 0.7

barChartView.barChart.data = barChartData
barChartView.barChart.setVisibleXRange(minXRange: 5, maxXRange: 5.5)
barChartView.barChart.xAxis.valueFormatter = IndexAxisValueFormatter(values: chartData.dataPoints)

// If user didn't change highlight, then highlight last bar
if !barChartView.didChangeHighlight {
	barChartView.barChart.moveViewToX(Double(chartData.dataPoints.count))
	barChartView.barChart.highlightValue(x: Double(chartData.dataPoints.count), dataSetIndex: 0, stackIndex: 0)
	
} else if let highlightIndex = barChartView.highlightIndex {
	barChartView.barChart.moveViewToX(highlightIndex)
}

note: chartData is a tuple: (dataPoints: [String], dataValues: [Double])

[rl-pavel]

Closing because #3174 seems to have fixed this.

[mikeCalvir]

I just down-versioned to 3.0.4 but my xAxis labels still never show. If I break on my value converter it is called and returns a correct string, but I've never seen an x axis label so far (just started using this framework).

My config:

    ChartXAxis *xAxis = self.chartView.xAxis;
    xAxis.labelPosition = XAxisLabelPositionBottom;
    xAxis.labelFont = [UIFont defaultOfSize:12.f];
    xAxis.labelTextColor = UIColor.blackColor;
    xAxis.drawGridLinesEnabled = NO;
    xAxis.drawAxisLineEnabled = YES;
    xAxis.wordWrapEnabled = YES;
    xAxis.granularity = 1;
    xAxis.granularityEnabled = YES;
    xAxis.valueFormatter = [[DateValueFormatter alloc] init];

[rl-pavel]

@mikeCalvir You have to provide the values to the formatter. There's an initialized that accepts and array of strings, try using that.

[mikeCalvir]

Thanks for the reply and the suggestion @Pahitos.
But, I'm using a Scatter chart and I want the user to be able to zoom in (from a week down to say an hour or few).
I have loaded all the data X positions with timeinterval values, and they are being passed to my DateValueFormatter instance and it is returning correct strings.
But still nothing.

If I initialize it with an array of strings, given I have hundreds of points, I don't see how it will work correctly?

Thanks for any help, hopefully I'm being slow and missing something obvious, it would be great to see any x labels at all at this point :)

[mikeCalvir]

Also even if I don't specify any formatter, I was expecting to see just the timeinterval numbers, but I get nothing.

[rl-pavel]

I've never used a scatter chart unfortunately. Can you send a screenshot of what you're seeing?

[mikeCalvir]

I can’t right now, but basically I see everything except the x labels - identical to your top image in effect except my chart content is different. I’m wondering if my cocoapods install is doing the right thing but it does all appear to be correct. (I’m using the Cocoapods app). I was hoping that v3.1 would be out today and cure this but if it will be later than Monday I’d prefer an earlier fix. I’ll be back in about 8 hours, thanks again for any ideas :)

…

On 1 Feb 2018, at 23:19, Pavel ***@***.***> wrote: I've never used a scatter chart unfortunately. Can you send a screenshot of what you're seeing? — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or mute the thread.