ios - TKChartDataPoint 不符合预期的类型序列

Question

我从 Telerik 开始，并尝试做提供的演示项目。

当我试图声明一个 TKChartDataPoint 时，它给出了一个错误:

代码片段:

class ViewController: UIViewController {

let x = 10
let y = 10

override func viewDidLoad() {
    super.viewDidLoad()
    // Do any additional setup after loading the view, typically from a nib.

    let chart = TKChart(frame: self.view.bounds.insetBy(dx: 15, dy: 15))
    chart.autoresizingMask = [UIViewAutoresizing.flexibleWidth, UIViewAutoresizing.flexibleHeight]
    self.view.addSubview(chart)

    var randomNumericData = [TKChartDataPoint]()
    for i in 0..<10 {

        //Error Here
        randomNumericData += TKChartDataPoint(x: i, y: Double(arc4random() % 100))

    }

    chart.addSeries(TKChartLineSeries(items: randomNumericData))

    chart.title.isHidden = false
    chart.title.text = "This is a chart demo"
    chart.legend.isHidden = false

    chart.allowAnimations = true
}

Answer 1

您应该只使用append 将您的对象添加到数组中:

randomNumericData.append(TKChartDataPoint(x: i, y: Double(arc4random() % 100)))

如果你真的想要，你可以使用 +=，但是 randomNumericData 是一个数组，所以要用 + 或 添加到它+=，添加的部分也应该是一个数组:

randomNumericData += [TKChartDataPoint(x: i, y: Double(arc4random() % 100))]

在我看来，第一种解决方案是首选。