How to animate only x Axis in core plot?

问题

I am animating x Axis value in core plot but with that my xAxis , yAxis is also animating and disappearing . My set up for graph is shown in here as I have some issue related to graph data I have asked question and here as u can see in code graph set up is correct : Graph set up code. What is missing? MY code for animation is as below:

 let plotSpace = graph.defaultPlotSpace as! CPTXYPlotSpace!
    let location = currentIndex
    let oldRange = CPTPlotRange(location: location , length: kMaxDataPoints - 2)

    let newRange = CPTPlotRange(location: location + 1, length: kMaxDataPoints - 2)

    CPTAnimation.animate(plotSpace, property: "xRange", fromPlotRange: oldRange, toPlotRange: newRange, duration: 1.0)

    currentIndex += 1

回答1:

(moved from the comments into an answer)

You can use axis constraints to lock the y-axis in position. Look at the "Real Time Plot" in the Plot Gallery example app.

来源：https://stackoverflow.com/questions/38217491/how-to-animate-only-x-axis-in-core-plot