fatal error: Index out of range

[nandawys]

Empty dataSet cause this crash.
So I have to add this judge statement. It works, but I'm not sure what's behind this ...

open override func entryForIndex(_ i: Int) -> ChartDataEntry?
{
if _values.count < i + 1 {
return nil
}
return _values[i]
}

[pmairoldi]

I agree that this function could be better. Since it returns an optional the check should be done in the function. I believe that the actual intent is that the function should be marked as throws and the return type should not be optional.

[AtharvaVaidya]

I'm still facing this issue. Is this going to be resolved?

[liuxuan30]

first we need to know why it's oob. Empty data set should not go that far
most of the time it's guarded, so should be fine. Where did it crash exactly?

[jjatie]

Given Swift Arrays expect the user to either check that the index is within bounds, that the Charts API should do the same. This allows the DataSet to return a non-optional ChartDataEntry.

[liuxuan30]

no update for half year. closing