Question 1

How to add tooltips to SwiftChart when touching data points?

Accepted Answer

Implement the ChartDelegate's didTouchChart method to capture touch events and display custom UI elements. Use the provided indexes and x-value to position tooltips, similar to the moving label example in the README.

Question 2

SwiftChart vs Charts framework: which is better for iOS?

Accepted Answer

SwiftChart is lighter and simpler for basic line and area charts with quick setup, while Charts (by Daniel Gindi) offers more chart types and advanced features like animations, but with a steeper learning curve and larger footprint.

Question 3

Can SwiftChart handle dynamic data updates in real-time?

Accepted Answer

Yes, you can add or remove series dynamically using the add and removeSeriesAt methods. However, for smooth updates, you may need to manually trigger redraws, as the library doesn't emphasize built-in animation or performance tuning.

Question 4

How to customize axis labels format in SwiftChart?

Accepted Answer

Use the xLabelsFormatter and yLabelsFormatter properties on the Chart object. For example, chart.xLabelsFormatter = { String(Int(round($1))) + "h" } formats x-axis labels with hours, as shown in the partially filled series section.

Question 5

Is SwiftChart compatible with SwiftUI?

Accepted Answer

SwiftChart is built with UIKit, so to use it in SwiftUI, wrap it in a UIViewRepresentable. The README doesn't provide specific SwiftUI guidance, requiring additional integration effort.

Question 6

Why is my SwiftChart not displaying anything in the app?

Accepted Answer

Common causes include incorrect view sizing or AutoLayout constraints. Ensure initialization in viewDidLoad with proper frames, and debug using UI Hierarchy inspection, as advised in the 'Common issues' section.

SwiftChart

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