Ios charts zoom back out after double tap

Question

Hi i am new to iOS charts.

iOS-Charts

I am using double tap to zoom into my LineChart, but cannot find a way to zoom back out.

Is there a simple way to do this or do I have to intercept the double tap and save my state and restore it later?

I am using Charts 3.0.1 and Swift 3.0.2.

Thanks.

Answer 1

This is how you zoom out in Charts

chartView.fitScreen()

Since iOS Charts is analogy to MPAndroidChart , huge part of its documentation, wiki and Q&A applies to both libraries.

Answer 2

This is how we did it. We put this line of code when a button was tapped to reset the zoom.

self.lineChartView.zoomToCenter(scaleX: 0, scaleY: 0)

If you want, you can also put in a plus and minus button and zoom in/out accordingly. You can get the current scale by using this line of code self.lineChartView.scaleX or self.lineChartView.scaleY and then add/subtract a fixed amount every time the zoom in/out button is tapped.