问题
chart, here is my code:
private func setChart(pieChartView: PieChartView, values: [Double]) {
var dataEntries: [PieChartDataEntry] = []
let dataPoints = ["Mar","Apr","May"]
for i in 0..<dataPoints.count {
let dataEntry = PieChartDataEntry(value: values[i], label: dataPoints[i])
dataEntries.append(dataEntry)
}
let pieChartDataSet = PieChartDataSet(values: dataEntries, label: "")
pieChartDataSet.colors = [UIColor(red: 47/255, green: 164/255, blue: 59/255, alpha: 1.0),UIColor(red: 17/255, green: 128/255, blue: 127/255, alpha: 1.0),UIColor.orange]
let pieChartData = PieChartData(dataSet: pieChartDataSet)
pieChartView.data = pieChartData
pieChartView.centerText = "Amount Spent"
pieChartView.chartDescription?.text = ""
pieChartView.usePercentValuesEnabled = true
pieChartView.legend.horizontalAlignment = .center
}
How to add "%" in PieChart data ? NSNumberFormatter() is no longer available
---------------SOLUTION---------------
I post this solution for everyone who have same problem. I got it from chart-ios githup :
private func setChart(pieChartView: PieChartView, values: [Double]) {
var dataEntries = [ChartDataEntry]()
let dataPoints = ["Mar","Apr","May"]
for i in 0..<dataPoints.count {
let dataEntry = PieChartDataEntry(value: values[i], label: dataPoints[i])
dataEntries.append(dataEntry)
}
let pieChartDataSet = PieChartDataSet(values: dataEntries, label: "")
let green = UIColor(red: 47/255, green: 164/255, blue: 59/255, alpha: 1.0)
let blue = UIColor(red: 17/255, green: 128/255, blue: 127/255, alpha: 1.0)
pieChartDataSet.colors = [green, blue, .orange]
let pieChartData = PieChartData(dataSet: pieChartDataSet)
let formatter = NumberFormatter()
formatter.numberStyle = .percent
formatter.maximumFractionDigits = 2
formatter.multiplier = 1.0
formatter.percentSymbol = "%"
pieChartData.setValueFormatter(DefaultValueFormatter(formatter: formatter))
pieChartView.data = pieChartData
pieChartView.centerText = "Amount Spent"
pieChartView.chartDescription?.text = ""
pieChartView.usePercentValuesEnabled = true
pieChartView.legend.horizontalAlignment = .center
pieChartView.drawEntryLabelsEnabled = false
pieChartView.holeRadiusPercent = 0.55
pieChartView.highlightPerTapEnabled = false
pieChartView.animate(yAxisDuration: 2.0, easingOption: .easeInBack)
}
回答1:
Please refer below code, i have added %.
import UIKit
class ViewController: UIViewController {
@IBOutlet weak var pieChartView: PieChartView!
override func viewDidLoad() {
super.viewDidLoad()
// Do any additional setup after loading the view, typically from a nib.
let months = ["Jan", "Feb", "Mar", "Apr", "May", "Jun"]
let unitsSold = [20.0, 4.0, 6.0, 3.0, 12.0, 16.0]
setChart(months, values: unitsSold)
}
func setChart(dataPoints: [String], values: [Double]) {
var dataEntries: [ChartDataEntry] = []
for i in 0..<dataPoints.count {
let dataEntry = ChartDataEntry(value: values[i], xIndex: i)
dataEntries.append(dataEntry)
}
let pieChartDataSet = PieChartDataSet(yVals: dataEntries, label: "Units Sold")
let formatter = NSNumberFormatter()
formatter.numberStyle = .PercentStyle
formatter.maximumFractionDigits = 1
formatter.multiplier = 1.0
let pieChartData = PieChartData(xVals: dataPoints, dataSet: pieChartDataSet)
pieChartData.dataSet?.valueFormatter = formatter
pieChartView.data = pieChartData
pieChartView.holeColor = UIColor.clearColor()
// pieChartView.holeRadiusPercent = 0.95
pieChartView.centerText = "Hello\nThis is Pie chart"
pieChartView.usePercentValuesEnabled = true
var colors: [UIColor] = []
for i in 0..<dataPoints.count {
let red = Double(arc4random_uniform(255))
let green = Double(arc4random_uniform(255))
let blue = Double(arc4random_uniform(255))
let color = UIColor(red: CGFloat(red/255), green: CGFloat(green/255), blue: CGFloat(blue/255), alpha: 1)
colors.append(color)
}
pieChartDataSet.colors = colors
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
// Dispose of any resources that can be recreated.
}
}
Let me know if i could help you.
Have a happy coding.
回答2:
if you want to add % in in your graph as well as hide/remove 0.0 values from graph : # Swift 3 used below lines of code:-
func updateChartData() {
let chart = PieChartView(frame: mViewOutlet.frame)
// let chart = PieChartView(frame: CGRect(x: 122, y: 235 , width: self.mViewOutlet.frame.size.width, height: self.mViewOutlet.frame.size.height))
// 2. generate chart data entries
let track = ["Present","Leave", "EG/LC", "Halfday", "Absent", "Weeklyoff", "Holidays"]
// let money = [65, 13, 10, 2]
let money = mDaysArray
var entries = [PieChartDataEntry]()
for (index, value) in money.enumerated() {
print("index: \(index) \n value: \(value)")
let entry = PieChartDataEntry()
if value != 0 {
entry.y = Double(value)
}else{
}
entries.append(entry)
// entry.label = track[index] // if we want to remove name label
}
// 3. chart setup
let set = PieChartDataSet( values: entries, label: "Pie Chart")
// this is custom extension method. Download the code for more details.
//4. set chart color
let presentColor = UIColor(red: 80.0/255.0, green: 180.0/255.0, blue: 50.0/255.0, alpha: 1.0)
// let lateColor = UIColor(red: 241.0/255.0, green: 194.0/255.0, blue: 114.0/255.0, alpha: 1.0)
let leaveColor = UIColor(red: 203.0/255.0, green: 68.0/255.0, blue: 242.0/255.0, alpha: 1.0)
let egColor = UIColor(red: 95.0/255.0, green: 180.0/255.0, blue: 239.0/255.0, alpha: 1.0)
let halfdayColor = UIColor(red: 82.0/255.0, green: 64.0/255.0, blue: 152.0/255.0, alpha: 1.0)
let absentColor = UIColor(red: 242.0/255.0, green: 58.0/255.0, blue: 02.0/255.0, alpha: 1.0)
let weekOffColor = UIColor(red: 186.0/255.0, green: 221.0/255.0, blue: 79.0/255.0, alpha: 1.0)
let holidayColor = UIColor(red: 35.0/255.0, green: 215.0/255.0, blue: 179.0/255.0, alpha: 1.0)
let colors: [UIColor] = [presentColor,leaveColor,egColor,halfdayColor,absentColor,weekOffColor,holidayColor]
set.colors = colors
let data = PieChartData(dataSet: set)
let formatter = NumberFormatter()
formatter.numberStyle = .percent
formatter.maximumFractionDigits = 2
formatter.multiplier = 1.0
formatter.percentSymbol = "%"
formatter.zeroSymbol = ""
data.setValueFormatter(DefaultValueFormatter(formatter: formatter))
chart.data = data
chart.noDataText = "No data available"
chart.usePercentValuesEnabled = true
// user interaction
chart.isUserInteractionEnabled = false
let d = Description()
// d.text = "iOSCharts.io"
chart.chartDescription = d
// chart.tintColor = UIColor.black
// chart.centerText = "Pie Chart"
chart.holeRadiusPercent = 0.2
chart.chartDescription?.enabled = false
chart.legend.enabled = false
chart.data?.notifyDataChanged()
chart.notifyDataSetChanged()
chart.setNeedsDisplay()
chart.animate(xAxisDuration: 1.3, yAxisDuration: 1.3)
chart.transparentCircleColor = UIColor.clear
// self.view.addSubview(chart)
self.mPieChartMainView.addSubview(chart)
}
来源：https://stackoverflow.com/questions/40453604/how-to-add-to-data-in-ios-chart