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我正在学习ios-charts.我正在使用这里找到的教程.第一张照片显示了我得到的结果.如何删除蓝色圆圈点,使其仅显示如第二张图片中所示的平滑线条？

这是代码片段

import UIKit
import Charts

class ChartsViewController: UIViewController {

@IBOutlet weak var lineChartView: LineChartView!

override func viewDidLoad() {
    super.viewDidLoad()

    // Do any additional setup after loading the view.

    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)
    } …