How to reload data for line chart in swift? - ios

Question

I am using Charts library for rendering line chart but I am unable to reload the data as I am trying to fetch the data from the API, there is a method given notifyDataSetChanged() but not working. I am using the chart within tableView cell. If anybody has some idea please help me out..............................................
import UIKit
import Charts
class ChartViewCell: UITableViewCell, ChartViewDelegate {
#IBOutlet weak var lineChartViewContainer: UIStackView?
var yVlaues = [ChartDataEntry]()
lazy var lineChartView: LineChartView = {
let chartView = LineChartView()
return chartView
}()
override func awakeFromNib() {
super.awakeFromNib()
setLineChart()
loadData()
}
override func setSelected(_ selected: Bool, animated: Bool) {
super.setSelected(selected, animated: animated)
}
func setLineChart() {
lineChartView.delegate = self
lineChartView.noDataText = "No Data Found"
lineChartView.rightAxis.enabled = false
lineChartView.xAxis.drawGridLinesEnabled = false
lineChartView.leftAxis.drawGridLinesEnabled = false
lineChartView.legend.enabled = false
//lineChartView.leftAxis.labelFont = .boldSystemFont(ofSize: 14)
lineChartView.leftAxis.labelCount = 6
lineChartView.leftAxis.labelTextColor = .black
lineChartView.xAxis.labelPosition = .bottom
let screenSize = UIScreen.main.bounds
let screenWidth = screenSize.width
lineChartView.frame = CGRect(x: 10, y: 70, width: screenWidth - 20, height: 200)
setData()
self.addSubview(lineChartView)
}
func chartValueSelected(_ chartView: ChartViewBase, entry: ChartDataEntry, highlight: Highlight) {
print("Abhay x \(entry.x) y \(entry.y)")
}
func setData() {
let set1 = LineChartDataSet(entries: yVlaues)
set1.lineWidth = 1
set1.colors = [UIColor.colorFromHex(hexString: "#80005661")]
set1.drawVerticalHighlightIndicatorEnabled = true
set1.drawHorizontalHighlightIndicatorEnabled = false
set1.highlightColor = UIColor.colorFromHex(hexString: "#80005661")
set1.highlightLineWidth = 1.0
set1.drawValuesEnabled = false
set1.circleHoleColor = .white
set1.circleColors = [UIColor.colorFromHex(hexString: "#80005661")]
set1.circleRadius = 5
let data = LineChartData(dataSet: set1)
lineChartView.data = data
let startColor = UIColor.colorFromHex(hexString: "#80005661").cgColor
let endColor = UIColor.white.cgColor
let gradientColors = [startColor, endColor] as CFArray // Colors of the gradient
let colorLocations:[CGFloat] = [1.0, 0.0] // Positioning of the gradient
let gradient = CGGradient.init(colorsSpace: CGColorSpaceCreateDeviceRGB(), colors: gradientColors, locations: colorLocations) // Gradient Object
if let gradient = gradient {
set1.fill = Fill.fillWithLinearGradient(gradient, angle: 90.0) // Set the Gradient
}
set1.drawFilledEnabled = true // Draw the Gradient
}
func loadData() {
var params = [String: Any]()
guard let userId = Reusable.getUserInfo()?.id else { return }
params = ["user_id": userId]
WebServiceHelper.postWebServiceCall(Constants.baseURL + "performedWorkoutsGraph", params: params, isShowLoader: false, success: { (responceObj) in
let statusMsg = StatusBool(json: responceObj)
if statusMsg.status {
self.yVlaues.removeAll()
let responseJsonArr = responceObj["data"].arrayValue
for item in responseJsonArr {
let graphData = GraphDataModel(json: item)
let chartDataEntry = ChartDataEntry(x: Double(graphData.interval), y: Double(graphData.workouts))
self.yVlaues.append(chartDataEntry)
}
self.lineChartView.data?.notifyDataChanged()
self.lineChartView.notifyDataSetChanged()
} else {
CommonUtils.showToastMessage(message: statusMsg.message)
}
}
, failure: { (failure) in
print(failure)
})
}
}

Answer 1

I just found the solution but not the reloading tricks I m calling setData() inside my loadData() and it's working