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Hello.

It’s very strange, but chart can not be zoomed with pinch, only by double tap fitting full screen.
And when trying to zoom app freezes and CPU load became 100%.

func installChart() {
    sciChartSurface = SCIChartSurface(frame: self.view.bounds)
    sciChartSurface?.translatesAutoresizingMaskIntoConstraints = false


    self.vGraphBox.subviews.forEach({ $0.removeFromSuperview() })

    self.vGraphBox.addSubview(sciChartSurface!)

    NSLayoutConstraint.activate([
        sciChartSurface!.leftAnchor.constraint(equalTo: self.vGraphBox.leftAnchor),
        sciChartSurface!.rightAnchor.constraint(equalTo: self.vGraphBox.rightAnchor),
        sciChartSurface!.bottomAnchor.constraint(equalTo: self.vGraphBox.bottomAnchor),
        sciChartSurface!.topAnchor.constraint(equalTo: self.vGraphBox.topAnchor)
        ])

    // Add the SCIChartSurface as a subview
    self.vGraphBox.addSubview(sciChartSurface!)

    let xAxis = SCILogarithmicNumericAxis()
    xAxis.growBy = SCIDoubleRange(min: SCIGeneric(0.1), max: SCIGeneric(0.1))
    xAxis.scientificNotation = .logarithmicBase
    //xAxis.textFormatting = "#.#E+0"
    xAxis.logarithmicBase = 10.0
    xAxis.visibleRange = SCIDoubleRange(min: SCIGeneric(100), max: SCIGeneric(22000.0))

    let yAxis = SCINumericAxis()
    yAxis.autoRange = .never
    yAxis.visibleRange = SCIDoubleRange(min: SCIGeneric(-300.0), max: SCIGeneric(0.0))

    lineRenderableSeries.dataSeries = self.dataSeries
    lineRenderableSeries.strokeStyle = SCISolidPenStyle(colorCode: 0xFFE13219, withThickness: 1)

    //self.sciChartSurface?.chartModifiers.add(pinchZoomModifier) //Causes freeze
    self.sciChartSurface?.chartModifiers.add(SCIZoomPanModifier())
    self.sciChartSurface?.chartModifiers.add(SCIZoomExtentsModifier())

    SCIUpdateSuspender.usingWithSuspendable(sciChartSurface!) {
        self.sciChartSurface?.xAxes.add(xAxis)
        self.sciChartSurface?.yAxes.add(yAxis)
        self.sciChartSurface?.renderableSeries.add(self.lineRenderableSeries)
        self.sciChartSurface?.renderableSeries.add(self.lineRenderableSeriesMax)
    }
}
Version
latest
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Hello Vadim,

I’m not sure if it’s going to be fixed in 2.5x soon if at all, because it’s already working well in SciChart iOS 3.x which is in BETA at the moment, so you can try it out and let us know if that works as expected.

You can get 3.x beta via the CocoaPods, as described here – https://www.scichart.com/documentation/ios/current/integrating-scichart-libraries.html#integrating-scichart-using-cocoapods

Let us know If you need any help with getting 3.x BETA version if you decided to test it.

Best Regards,
Nazar R.
SciChart Developer

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