Could not cast value of type 'Charts.BarChartData' (0x10bbd31f0) to 'MYPROJ.BarChartData' (0x10aeed700).

[indrajitv]

please i want urgent help

[indrajitv]

internal override func calcMinMax()
{
super.calcMinMax()

    if (_data === nil)
    {
        return
    }

    let barData = _data as! BarChartData

    //HERE EXCEPTION THROWS
    _deltaX += 0.5

    // extend xDelta to make space for multiple datasets (if ther are one)
    _deltaX *= CGFloat(_data.dataSetCount)

    let groupSpace = barData.groupSpace
    _deltaX += CGFloat(barData.xValCount) * groupSpace
    _chartXMax = Double(_deltaX) - _chartXMin
}

[liuxuan30]

would you check let barData = _data as! BarChartData? what is _data's dynamicType?
the error message is saying the casting on BarChartData failed, but I have no idea yet; not many clues

[danielgindi]

You are importing the framework twice.
The first time as an actual framework, the second as source compiled as part of your project.

[partyspy]

In "Identity Inspector", the custom class' module related to your chart view in IB might not be rightly set.
In my situation, the module part is somehow automatically set to MyProjectName instead of Charts, which caused the same issue as indrajtv encountered.
But I still have no idea why MyProjectName appeared as a ModuleName there.