ios - 有人可以解决我对 corePlot 中的 CPTPlotDatasource 的查询吗

Question

此处 CPTScatterPlotFiledX 显示错误为:

Binary Operator cannot be applied to operand of Type _CPTScatterPlotFiledX and UInt!

对于 CPTScatterPlotFiledY 也是如此

func numberForPlot(plot: CPTPlot!, field fieldEnum: UInt, recordIndex idx: UInt) -> NSNumber! {
    switch fieldEnum
    {
    case CPTScatterPlotFieldX :
        if plot.identifier .isEqual("aapl")
        {
            var num: NSNumber = aaplArray.objectAtIndex(Int(idx)).valueForKey("x") as! NSNumber
            return num
            break
        }
        else if plot.identifier .isEqual("goog")
        {
            var num: NSNumber = googArray.objectAtIndex(Int(idx)).valueForKey("x") as! NSNumber
            return num
            break
        }
    case CPTScatterPlotFieldY :
        if plot.identifier .isEqual("aapl")
        {
            var num: NSNumber = aaplArray.objectAtIndex(Int(idx)).valueForKey("y") as! NSNumber
            return num
            break
        }
        else if plot.identifier .isEqual("goog")
        {
            var num: NSNumber = googArray.objectAtIndex(Int(idx)).valueForKey("y") as! NSNumber
            return num
            break
        }
    }
    return NSNumber(float: 0)
}

Answer 1

将 case CPTScatterPlotFieldX 替换为 case UInt(CPTScatterPlotField.X.rawValue) 以便将 enum 类型转换为原始 UInt 值