錯誤提示：Type ‘ChartDataSet’ does not conform to protocol ‘RangeReplaceableCollection’

解決方案如下：

extension ChartDataSet: RangeReplaceableCollection方法添加代碼

 public func replaceSubrange<C>(_ subrange: Swift.Range<Int>, with newElements: C) where C :
 Collection, ChartDataEntry == C.Element {
    }