Pie Chart label not show if its value 0

[devssun]

What did you do?

I made PieChart and it show great, but if value 0 then pie chart's label show overlapping.
I already use ValueFormatter() so if value 0 then not show value label.

let pFormatter = NumberFormatter()
pFormatter.numberStyle = .none
pFormatter.maximumFractionDigits = 1
pFormatter.multiplier = 1
pFormatter.zeroSymbol = ""
pieChartData.setValueFormatter(DefaultValueFormatter(formatter: pFormatter))
pieChartData.setValueFont(.systemFont(ofSize: 11))
pieChartData.setValueTextColor(.black)

how can I hidden label if its value 0, and show all legend

What did you expect to happen?

it its value 0, then hidden pie chart label. but show all legend

What happened instead?

I can't hidden label

Charts Environment

Charts version/Branch/Commit Number: 3.0.3
Xcode version: 9.2
Swift version: 3.2
Platform(s) running Charts: iOS 10, 11
macOS version running Xcode: 10.12.6

Demo Project

ℹ Please link to or upload a project we can download that reproduces the issue.

func setPieCharts(dataPoints: [String], values: [Double]) -> PieChartData {
        var dataEntries: [ChartDataEntry] = []
        
        for i in 0..<dataPoints.count {
            if values[i] == 0.0 {
//                continue
            }
            let dataEntry = PieChartDataEntry(value: values[i], label: dataPoints[i])
            dataEntries.append(dataEntry)
        }
        
        let pieChartDataSet = PieChartDataSet(values: dataEntries, label: nil)
        pieChartDataSet.colors = tempColor()
        
        if dataEntries.count > 3 {
            pieChartDataSet.xValuePosition = .outsideSlice
            pieChartDataSet.yValuePosition = .outsideSlice
        }else{
            pieChartDataSet.xValuePosition = .insideSlice
            pieChartDataSet.yValuePosition = .insideSlice
        }
        
        let pieChartData = PieChartData(dataSet: pieChartDataSet)
        
        
        let pFormatter = NumberFormatter()
        pFormatter.numberStyle = .none
        pFormatter.maximumFractionDigits = 1
        pFormatter.multiplier = 1
        pFormatter.zeroSymbol = ""
        pieChartData.setValueFormatter(DefaultValueFormatter(formatter: pFormatter))
        pieChartData.setValueFont(.systemFont(ofSize: 11))
        pieChartData.setValueTextColor(.black)
        return pieChartData
    }

[cwestMobile]

I also would like to know the resolution to this. Reminding myself :)

[devssun]

Hello @cwestMobile I solved it use trick.
got server data and make CustomLegend use LegendEntry then key with value 0 make empty string.

like this

1. make CustomLegend Array

    func setCustomLegend(dataPoints: [String], values: [Double]) -> [LegendEntry] {
        var customLegendEntries: [LegendEntry] = []
        for i in 0..<dataPoints.count {=
            customLegendEntries.append(LegendEntry(label: dataPoints[i], form: .default, formSize: CGFloat.nan, formLineWidth: CGFloat.nan, formLineDashPhase: 0.0, formLineDashLengths: nil, formColor: barColor[i]))
        }
        return customLegendEntries
    }

2. setting pie chart data

func setPieCharts(dataPoints: [String], values: [Double]) -> PieChartData {
   var dataEntries: [ChartDataEntry] = []
   for i in dataPoints.count {
        let dataEntry = PieChartDataEntry(value: values[i], label: values[i] == 0.0 ? "" : dataPoints[i])
            dataEntries.append(dataEntry)
        }
  ~~~~~
  return chartData
}

3. setting pie chart custom legend and data

chart.data = setPieCharts(dataPoints: (showChartData["key1"]?.displayName)!, values: (showChartData["key1"]?.displayCount)!)
 let chartLegend = setCustomLegend(dataPoints: (showChartData["key2"]?.displayName)!, values: (showChartData["key2"]?.displayCount)!)
let l1 = chart.legend
l1.setCustom(entries: chartLegend)

check it out! 😸