iOS Charts error Swift 4

Question

I use in my app library SwiftChart and I want to create such view of chart:

My code:

    class MyViewController: UIViewController, ChartDelegate {
  override func viewDidLoad() {
    lineChart.delegate = self
  }
// Chart delegate
func didTouchChart(_ chart: Chart, indexes: Array<Int?>, x: Double, left: CGFloat) {
    // Do something on touch
}

func didFinishTouchingChart(_ chart: Chart) {
    // Do something when finished
}

func didEndTouchingChart(_ chart: Chart) {
    // Do something when ending touching chart
}

func didTouchChart(chart: Chart, indexes: Array<Int?>, x: Double, left: CGFloat) {
    for (seriesIndex, dataIndex) in enumerate(indexes) {
        if dataIndex != nil {
            // The series at `seriesIndex` is that which has been touched
            let value = chart.valueForSeries(seriesIndex, atIndex: dataIndex)
        }
    }
}

But I received and error message:

Use of unresolved identifier 'enumerate'

What's wrong?

Your code seems to be in earlier version of Swift (3 <), it be `indexes .enumerated`. — Ahmad F, May 31 '18 at 07:56
Possibly Related: https://stackoverflow.com/questions/24028421/swift-for-loop-for-index-element-in-array — Ahmad F, May 31 '18 at 08:02

sinner · Answer 1 · 2018-05-31T08:04:26.100

1

Change your code snippet inside "didTouchChart" function to:

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)
        }
}

This is the correct syntax from swift 3 and onwards.

edited May 31 '18 at 08:04

answered May 31 '18 at 07:55

sinner

483
3
14

Error disappear, but chart is not load, i have empty space – Best Moments May 31 '18 at 07:57
"This is the correct syntax in swift" you should complete the info by adding "since Swift 3 and above". – Ahmad F May 31 '18 at 08:00
@BestMoments I would assume that the *syntax* is correct, displaying an empty space is another issue so far... – Ahmad F May 31 '18 at 08:03
@AhmadF Thanks buddy, Edited the answer – sinner May 31 '18 at 08:04
@BestMoments Please ask this as another question. – Ashley Mills May 31 '18 at 08:37

iOS Charts error Swift 4

1 Answers1