Use of unresolved identifier "value" in SwiftCharts

Question

I'm trying to implement the touch to show the current value. The problem is that I'm getting use of unresolved identifier "value" when I try to add the text to my label. The series are shown correctly in the Chart but I'm not getting the value inside the indexes.

func didTouchChart(_ chart: Chart, indexes: [Int?], x: Float, left: CGFloat) {
        if dataResponse.count > 0 {
            for (seriesIndex, dataIndex) in indexes.enumerated() {

              if dataIndex != nil {
                // The series at `seriesIndex` is that which has been touched

                let value = chart.valueForSeries(seriesIndex, atIndex: dataIndex)
                let date = dataDates[dataIndex!]
                let type = SensorType.getSpecialCharacter(sensorTypes[dataIndex!])
                lblValue.text = "\(value)\(type) \(date)" //Ex. 78°C 12-11-2018
              }

            }
        }

    }

It used to work fine before, but I don't know what happened. I don't know what could be happening, I was expecting this behavior. 660d660e-9adc-11e5-8a67-0c3036c20862

After a couple of runs and cleans the error changed to Fatal error: Unexpectedly found nil while implicitly unwrapping an Optional value: file. I must say I don't have any file variable nor class in my code.

you mean `let value = chart.valueForSeries(seriesIndex, atIndex: dataIndex)` is executing successfully but `lblValue.text = "\(value)\(type) \(date)"` is producing error. Right? — Keshu R., Jan 10 '20 at 18:27
@iOSArchitect.com nope. The error is produced in `lblValue.text = "\(value)\(type) \(date)" ` — Jalil, Jan 10 '20 at 18:29
Well, I don't see any errors. Might sounds silly, but did you try cleaning and rebuilding your project. It works sometimes :) — Keshu R., Jan 10 '20 at 18:34
@iOSArchitect.com I even did it with if let for it not to crash, but it always has "something" — Jalil, Jan 10 '20 at 19:17
Instead of `if dataIndex != nil`, try `if let dataIndex = dataIndex { ... }`, and change `dataIndex!` to `dataIndex`. — koen, Jan 10 '20 at 20:35
At the end I dissociated the view's class and associated again and it worked — Jalil, Jan 10 '20 at 20:40
@Jalil for future readers, could you describe your solution in detail in an answer? — koen, Jan 10 '20 at 22:24

Use of unresolved identifier "value" in SwiftCharts

0 Answers0