Questions

I am planning to have a graph like in attached image. Just to have only X values and additional Label provider on it and an indication to point the value like black arrow.
Need your inputs. Thanks in advance.

Hi,

Using the ZoomExtentsModifier on multiple axis used to work in an earlier version of SciCharts, but is broken in 4.3.0. I have two y-axes set up, left and right on my chart, with the right-hand-side just mirroring the left. When I double-tap to zoom to the x/y range of the graph, only the x range is modified. If I disable the change listener that mirrors the range change on the primary y axis, double tap works as expected, but my right hand side y-axis no longer mirrors the primary axis range. This is how I’ve set up the dual axes:

        let yAxis = SCINumericAxis()
        yAxis.axisTitle = "Acceleration (g)"
        yAxis.axisAlignment = .left
        yAxis.visibleRangeLimitMode = .minMax
        chart?.yAxes.add( yAxis )

        // Add an additional visible yAxis to the right without label
        let yAxisRight = SCINumericAxis()
        yAxisRight.axisAlignment = .right
        yAxisRight.axisId = "yAxisRight"
        chart?.yAxes.add( yAxisRight )

        // Sync values with left (primary) axis
        yAxis.visibleRangeChangeListener = { (axis, oldRange, newRange, isAnimating) in
            yAxisRight.visibleRange = newRange
        }

Commenting out the listener at the bottom fixes the ZoomExtentsModifier problem, but is obviously not a workable solution. Any help would be appreciated. Thanks

Hello,

We need to add a label with the value of the yAxis on top of all Point Markers. There is an example on WPF, but found nothing on iOS.

How can we achieve that?

There are no simple macOS tutorial projects, so I transplant ios “Tutorial 01 Create Simple 2D Chart” to macOS one. (Attached file.)

Build and Run successfully. But no appear the coded chart. It seems that only SCIChartSurface is being displayed. (without axis and line series)
I enabled SciChart Console Debugging and got like this.

2021-09-17 20:48:06.077950+0900 StoryboardTest[75014:920684] [INFO] - [SCIAxisBase] isSuspended = YES. Ignoring `invalidateElement:` call
2021-09-17 20:48:06.078006+0900 StoryboardTest[75014:920684] [INFO] - [SciChartSurfaceBase] IsSuspended=YES. Ignoring `invalidateElement:` call

Why doesn’t the chart show up? Would you mind giving me some advice?

P.S.
It seems that the file was not attached properly.
Please download the file from here.
https://drive.google.com/file/d/1YfJIf0G14QOxA0fzmEQXyAEbPrfMx4CU/view?usp=sharing

When i try to add SCITextAnnotation and text color is white, a gray outline appears around the symbol (triangle).
How can I turn it off or change the color?

I am using sci charts to show live graphs of some devices. While displaying a graph on IPhone X or iPhone 6s it sometimes lags and lines started overlapping. It’s working fine on devices iPhone XSMax, iPhone 11. I have attached a 3 screenshots. Once when graph starts lagging, 2nd when graph is in middle, 3 when graph completes. please have a look. It starts lagging and overlapping lines when a new graph starts and when it ends it shows a complete graph shown and then again same issue repeats. It also started working correctly after some time. I need information about this issue. How to fix it and why it’s happening like this…

When i try to run the simple Example from the Documentation ( with my trial License Key ) :

class AppDelegate: NSResponder, NSApplicationDelegate {
override init(){
// Set this code once in AppDelegate or application startup
SCIChartSurface.setRuntimeLicenseKey(“XXXXXX”);
super.init()

}

i receive this error and the application builds but fails to start :

libc++abi: terminating with uncaught exception of type NSException
*** Terminating app due to uncaught exception ‘License Exception’, reason: ”
terminating with uncaught exception of type NSException

Just trying to run the demo using these instructions: https://github.com/abtsoftware/scichart.ios.examples.

It doesn’t work I’m getting “Failed to emit precompiled header” and “SciChart/SciChart.h file not found”

Hi everyone!

I have a candlestick chart that uses SCIZoomPanModifier() so i can zoom and pan in the chart. I added a SCITooltipModifier() so i can inspect the individual data points. I noticed that by adding the toolTipModifier, that my pan and zoom stops working. I can’t figure out why. Would really appreciate if someone could tell me why or if i am missing some variable i need to set

Hi guys,

I just started using SCICHART. I am working my way through the provided tutorials and i noticed that when i add a SCITooltipModifier to the chart, all my other modifiers (zoom and pan and pinchzoom) stopped working. Is this normal? Because i want my chart to have zoom functions and show what datapoints are touched by a user.

Thanks in advance!

Hi all,
I am using the iOS SciCharts version to implement a heatmap series in my application. I am testing out the heatmap by providing a test series of random 100 zValues that range from 1-200. The Heatmap with the stops below just appears blue (see image). My suspicion is that either I am not updating the zValues correctly or the andStops is too low. Can anyone provide insights on what could be the issue?

//Test zValues
let SpectTestArray: [Double] = [ 12,  14, 68, 137, 164, 124, 124, 122, 162, 128, 45, 129,  40,  91,  53, 159,  77,  59,   0,  91, 92,  73,  77,  67, 163,  69, 149, 115,  17,  85, 119, 129, 186,  93,  80,  34, 159, 115,  65, 181, 159,  67, 152,  29,   6, 162,  51, 196, 186, 122, 114, 171, 159, 116,  20, 102,   4, 174, 144, 160, 89,  51,  89, 130, 172, 186,  40, 174,  20, 120, 88, 151, 127, 167,  10,  49, 198,  67, 184, 197, 152, 193, 196, 163,  18,  77,  17, 143, 124, 115, 1, 115, 126,  22,  35,   6,  58, 121,  77,   5]

let colors = [UIColor.fromARGBColorCode(0xFF00008B)!, UIColor.fromARGBColorCode(0xFF6495ED)!, UIColor.fromARGBColorCode(0xFF006400)!, UIColor.fromARGBColorCode(0xFF7FFF00)!, UIColor.yellow, UIColor.red]

CH1HeatMapRenderableSeries = SCIFastUniformHeatmapRenderableSeries()
        CH1HeatMapRenderableSeries.dataSeries = CH1SpectDataSeries
        CH1HeatMapRenderableSeries.minimum = 0.0
        CH1HeatMapRenderableSeries.maximum = 200.0
        CH1HeatMapRenderableSeries.colorMap = SCIColorMap(colors: colors, andStops: [0.0, 0.2, 0.4, 0.6, 0.8, 1.0])
        spectchartsurface?.renderableSeries.add(CH1HeatMapRenderableSeries)

        var Spectvalues = SCIDoubleValues(capacity: 100)

        for n in 0...SpectTestArray.count-1 {
            Spectvalues.add(SpectTestArray[n])
        }
//        print(Spectvalues)
        CH1SpectDataSeries.update(z: Spectvalues)

SplineLineRenderableSeries doesn’t render curved graph line properly in Swift , it renders stepped line for the data series .For reference please check the Screenshot attached ,ECG line(Green) rendered as stepped line (Marked by rectangle). Let me know anything I need to update in my code

Please find below the code for initialisation go the graph and updating the graph same. I am updating graph realtime with same DataSeries.

1. Graph initialisation code

   func init_ECG_Chart()
   {
   //Remove Theme From Chart By Apply & Remove & Change Border color
   SCIThemeManager.applyTheme(to: self.ecg_Chart_Surface, withThemeKey: SCIChart_Bright_SparkStyleKey)
   SCIThemeManager.removeTheme(byThemeKey: SCIChart_Bright_SparkStyleKey)

   self.ecg_Chart_Surface.isOpaque = false
   self.ecg_Chart_Surface.backgroundColor = .clear
   self.ecg_Chart_Surface.renderableSeriesAreaBorderStyle = SCISolidPenStyle(color: .clear, thickness: 0)
   
   //Line
   let lineSeries = SCISplineLineRenderableSeries()
   
   lineSeries.strokeStyle = SCISolidPenStyle(color: ecgSelectedColor, thickness: 2.0)
   lineSeries.dataSeries = ecgLineDataSeries
   

   // lineSeries.resamplingMode = SCIResamplingMode_None //Resampling off
   // lineSeries.resamplingMode = SCIResamplingMode_Auto //Resampling off

   let xAxis = SCINumericAxis()
   xAxis.axisAlignment = .bottom
   xAxis.drawLabels = false
   xAxis.drawMajorGridLines = false
   xAxis.drawMinorGridLines = false
   xAxis.drawMajorTicks = false
   xAxis.drawMinorTicks = false
   
   let yAxis = SCINumericAxis()
   yAxis.axisAlignment = .left
   yAxis.drawLabels = false
   yAxis.drawMajorGridLines = false
   yAxis.drawMinorGridLines = false
   yAxis.drawMajorTicks = false
   yAxis.drawMinorTicks = false
   yAxis.autoRange = .never   //Stop auto ranging axis
   yAxis.visibleRange = SCIDoubleRange(min: -32, max: 96)
   

   // yAxis.visibleRangeLimit = SCIDoubleRange(min: -32, max: 96)

   yAxis.growBy = SCIDoubleRange(min: 0.2, max: 0.2)
   
   SCIUpdateSuspender.usingWith(self.ecg_Chart_Surface) {
   
       self.ecg_Chart_Surface.xAxes.add(items: xAxis)
       self.ecg_Chart_Surface.yAxes.add(items: yAxis)
       self.ecg_Chart_Surface.renderableSeries.add(items: lineSeries)
   
       //self.ecg_Chart_Surface.chartModifiers.add(items: SCIZoomExtentsModifier(),SCIPinchZoomModifier())
   }
   

   } //Init ECG

2. Graph updation code

   func update_ECG_Chart(xValues:SCIDoubleValues,yValues:SCIDoubleValues)
   {

   SCIUpdateSuspender.usingWith(self.ecg_Chart_Surface) {
   
       self.ecgLineDataSeries.append(x: xValues, y: yValues)
     //  self.ecg_Chart_Surface.zoomExtents()
   
       self.ecg_Chart_Surface.zoomExtentsX()
   
   }
   

   } //Update ECG

We’re using Xamarin.Forms. We were using iOS build 5019 and Android build 4441 and we had a custom DatelabelProvider set on our X axis in both platforms which worked fine.

However after updating to latest builds (5022 and 4459), the provider’s FormatLabel (FormatLabelFormatted on Android) isn’t being called and the default label formatting is applied.

I have a question about an apparent regression/change from v2 to v4.

My chart uses an SCIHorizontallyStackedColumnsCollection with three SCIStackedColumnRenderableSeries instances. One of those is assigned to the right-hand Y axis, and the other two are assigned to the left-hand Y axis. Left and right Y axes have very different ranges.

In v2, each series in the group honored its assigned axis. In v4, each series is using the scale of the left-hand Y axis. This happens regardless of the order I add the renderable series to the columns collection.

In the example below, the magenta, blue, and yellow bars have a range of -2 to 2, and are assigned to the left-hand axis. The green bars have a range of 0 to 30 and are assigned to the right-hand axis. I expect all 4 bars to be displayed using the full vertical range of the chart, but instead everything is using the left-hand axis, and the non-green bars have very little displacement.

This is a change in behavior from v2 to v4. Is it intentional? Is there an easy workaround?

I tried to hack around it by having two different SCIStackedColumnRenderableSeries instances, one with 3 placeholder series/1 real series (RH axis) and the other with 1 placeholder/3 real series (LH axis). That doesn’t help. If there are two different column collections on the chart, they both use the left-hand axis, regardless of the order that they are added.

Minimal repro case is attached. But the crux is at the end. If I comment out the .add(rightStacks) call, I get desired behavior for the stack assigned to the left axis. If I comment out the .add(leftStacks), I get desired behavior for the stack assigned to the right axis. What I want is the chart I’d get by overlaying the second and third screenshots, but with the 0 point of left and right Y axis aligned.

    let rightStacks = SCIHorizontallyStackedColumnsCollection()
    rightStacks.add(rsRightPlaceholder1)
    rightStacks.add(rsRightPlaceholder2)
    rightStacks.add(rsRightPlaceholder3)
    rightStacks.add(rsRight)
    surface.renderableSeries.add(rightStacks)

    let leftStacks = SCIHorizontallyStackedColumnsCollection()
    leftStacks.add(rsLeftSine)
    leftStacks.add(rsLeftSingle)
    leftStacks.add(rsLeftDouble)
    leftStacks.add(rsLeftPlaceholder)
    surface.renderableSeries.add(leftStacks)

Edit

I think I’ve found the cause.

If I manually set (at line 46) yAxisLeft.axisId = “yAxisMyLeft”, then when I render, I get this in the console log:

2021-03-10 16:02:07.993233-0800 SciChart POC[86749:4815412] [WARNING] – [Render Warnings] Could not draw a renderable series of type SCIHorizontallyStackedColumnsCollection. YAxis with Id == DefaultAxisId doesn’t exist. Please ensure that the YAxisId property is set to a valid value.

2021-03-10 16:02:08.509648-0800 SciChart POC[86749:4815412] [WARNING] – [Render Warnings] Could not draw a renderable series of type SCIHorizontallyStackedColumnsCollection. YAxis with Id == DefaultAxisId doesn’t exist. Please ensure that the YAxisId property is set to a valid value.

I conclude from this behavior that SCIHorizontallyStackedColumnsCollection is hardwired to the default axis internally, regardless of the settings of the collection members.

Good day guys. I have download SciChart_iOS_SDK_4.2.0.5533 on Macbook M1. And try to integrate ios-arm64_armv7 verions to my project. I have added SciChart.xcframework to frameworks in Xcode 12.4. But the build is failed with a few errors:

1. unable to load standard library for target arm-64-apple-ios9.0
2. Failed to build module ‘SciChart’ from its module interface, it may have been damaged or it may have triggered a bug in Swift compiler when it was produced.

Can you tell me please did I use the right version of SciChart.xcframework for apple silicone? And how to solve this errors?

Good day! I have download this zip archive SciChart_iOS_SDK_4.2.0.5533.zip, on my laptop. Opened it and can not find the file SciChart.xcframework, according description from this article. I need to add library to Xcode frameworks, but I can not do it. Please can you tell me where can I get this file.

Guys can you tell me please why I get this error after build on new `mac M1 chip and how to solve it:

error: unable to load standard library for target ‘arm64-apple-ios8.0’
/Users/nameuser/Projects/pojectname/ios/SciChart.framework/Modules/SciChart.swiftmodule/arm64.swiftinterface:1:1: error: failed to build module ‘SciChart’ from its module interface; the compiler that produced it, ‘Apple Swift version 5.1.3 (swiftlang-1100.0.282.1 clang-1100.0.33.15)’, may have used features that aren’t supported by this compiler, ‘Apple Swift version 5.3.2 (swiftlang-1200.0.45 clang-1200.0.32.28)’
// swift-interface-format-version: 1.0`

Please tell me how to add the ability to use multiple touch. The goal is that when the user touches the screen in two places at the same time, two lines appear on the graph. I would like to understand whether this is possible?

Hi , many of the charts provide a way to set the date on the x axis for the data series and that makes the axis match the DataSeries value defined for that axis, but for heatmap dataseries when you define xType as date the xAxis of type date is not displaying on surface, I don’t know what I’m doing wrong and there is no sample for dates on GitHub , the samples only use int , would be great if you can provide a date sample for the heatmap , thanks

Hi there,

I’m trying to display little icons as axis labels using the LabelProvider API and NSAttributedString (with NSTextAttachmet). Is this supported? Here’s a minimal example:

import UIKit
import Foundation
import SciChart
import SciChart.Protected.SCILabelProviderBase

class ViewController: UIViewController {

    private lazy var chart: SCIChartSurface = {
        let c = SCIChartSurface(frame: .zero)
        c.xAxes.add(items: SCINumericAxis())

        let yAxis = SCINumericAxis()
        yAxis.labelProvider = SymbolLabelProvider()
        c.yAxes.add(items: yAxis)
        return c
    }()

    override func viewDidLoad() {
        super.viewDidLoad()

        SCIChartSurface.setRuntimeLicenseKey(myLicenseKey)

        view.addSubview(chart)
        chart.translatesAutoresizingMaskIntoConstraints = false
        let guide = self.view.safeAreaLayoutGuide
        NSLayoutConstraint.activate([
            chart.leadingAnchor.constraint(equalTo: guide.leadingAnchor),
            chart.trailingAnchor.constraint(equalTo: guide.trailingAnchor),
            chart.topAnchor.constraint(equalTo: guide.topAnchor),
            chart.bottomAnchor.constraint(equalTo: guide.bottomAnchor),
        ])
    }
}

class SymbolLabelProvider: SCILabelProviderBase<SCINumericAxis> {

    lazy var numberFormatter: NumberFormatter = {
        let f = NumberFormatter()
        f.allowsFloats = true
        f.maximumFractionDigits = 2
        return f
    }()

    init() {
        super.init(axisType: ISCINumericAxis.self)
    }

    override func formatLabel(_ dataValue: ISCIComparable!) -> ISCIString! {

        let intValue = Int(dataValue.toDouble())
        let font = UIFont.init(descriptor: axis.tickLabelStyle.fontDescriptor, size: UIFont.systemFontSize * 4)

        if intValue.isMultiple(of: 2) {
            let i = UIImage(systemName: "circle", withConfiguration: UIImage.SymbolConfiguration(font: font))
            return NSAttributedString(attachment: NSTextAttachment(image: i!))
        } else {
            let attributes: [NSAttributedString.Key: Any] = [
                .font: font,
                .foregroundColor: UIColor.yellow,
            ]
            return NSAttributedString(string: numberFormatter.string(for: dataValue.toDouble())!, attributes: attributes)
        }
    }
}

See attached screenshot for the result.

If this is not supported: any suggestions / ideas for a workaround?

Thanks
—Matthias

how to create ECG Monitor demo

Hi guys,

I want to show x value on chart bar itself as shown in the attached image along with this query. I tried using annotation where I need to give x and y value each time and it look not appropriate in the 2 data series column chart using, instead of that I need easy way to represent label of bar value on graph bar.

please suggest if any.

Thanks in advance.

Hi guys,

I have some troubles with piecharts in swift. I want to provide custom labels outside of the piecharts segments. I found a screenshot of a nested piechart attached to an issue in your issue tracker. Thats what I want to do in swift, but I couldn’t find out a way to do so. Could you please provide an example code?

Thanks a lot in advance!
Alex

Hey everyone, my team currently has Scicharts for WPF set up and functioning the way we want it too.

We are moving to Xamarin and have tested Scicharts in a Xamarin.Forms project working for Android/iOS and Windows WPF.
The next step was to install Visual Studios for Mac, and setup a new Xamarin.Forms project and pull the code from the windows version of our Xamarin.Forms project. For windows we use a custom renderer to get the scicharts to work for all platforms available on the windows version. For Mac, we are trying to get a custom renderer set up to load the swift version of the Scicharts for Mac. It’s not going so well.

Can anyone provide details on if it’s possible to get a xaramarin.forms project to load the scicharts for mac framework?

Thanks

NOTE** I picked iOS because for some reason MacOS wasn’t in the list of platforms

Hi, I want to set yaxis labels outside the chart but unable to find any solution please help.

I’m updating some code that was written against SciChart iOS v2. We have one graph in that code that relied on removeFromLegend in a renderable series, to prevent the legend from getting ridiculous long.

As an example, suppose we have Western Earth, Western Wind, Western Fire, Eastern Earth, Eastern Wind, and Eastern Fire. Each element is styled the same, no matter where it’s located. In the legend, we only want to see Earth, Wind, and Fire. Our actual list of series is much longer…4 “elements”, up to 8 locations, making 32 legend entries, with 28 duplicates.

What’s the replacement for removeFromLegend? How do I prevent these duplications?

I had recently integrated SciChart into my app, and faced some problems with chat appearance on trial mode which are described here: https://www.scichart.com/questions/ios/issue-with-scichart-on-ios-simulator
Due to this problems I tried to run my app on an actual device, and got this build error from Xcode:

”’
ld: building for iOS, but linking in dylib file (/Users/ruslansabirov/Library/Developer/Xcode/DerivedData/exinity-aupulhpegzsnlfcrnqfiwnvnljpj/Build/Products/Debug-iphoneos/SciChart.framework/SciChart) built for iOS Simulator, file ‘/Users/ruslansabirov/Library/Developer/Xcode/DerivedData/exinity-aupulhpegzsnlfcrnqfiwnvnljpj/Build/Products/Debug-iphoneos/SciChart.framework/SciChart’ for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)
”’
How can I fix this problem?

While moving the rollover cursor, if the number of series under the cursor increases, the rollover cursor labels become wrongly positioned. This ViewController subclass Swift example reproduces the problem.

import UIKit
import SciChart


class ViewController: UIViewController {
    // Surface is added in Storyboard
    @IBOutlet weak var surface: SCIChartSurface!
    override func viewDidLoad() {
        super.viewDidLoad()

        let xAxis = SCINumericAxis()
        let yAxis = SCINumericAxis()
        xAxis.visibleRange = SCIDoubleRange(min: 0, max: 260)
        yAxis.visibleRange = SCIDoubleRange(min: -5, max:12)
        yAxis.autoRange = .never

        self.surface.chartModifiers.add(items: SCIRolloverModifier())
        self.surface.xAxes.add(xAxis)
        self.surface.yAxes.add(yAxis)
        self.surface.renderableSeries.add(items:
            renderableSeries( 10...50, 10, .red),
            renderableSeries(150...250, 8, .green),
            renderableSeries( 10...100, 2, .cyan),
            renderableSeries(200...250, 0, .orange),
            renderableSeries( 10...250, 5, .white)
        )
    }
    func renderableSeries(_ xValues:ClosedRange<Int>, _ yValue:Double, _ color:UIColor) -> SCIFastLineRenderableSeries {
        let series = SCIXyDataSeries(xType: .double, yType: .double)
        xValues.forEach { series.append(x: $0, y: yValue ) }
        let rSeries = SCIFastLineRenderableSeries()
        rSeries.dataSeries = series
        rSeries.strokeStyle = SCISolidPenStyle(color: color, thickness: 4)
        return rSeries
    }
}

Hi,

We have an issue where the graph grid lines and tick markers do not show on iOS 10. Everything works on iOS 11 and up. Any idea why this is happening?

Hi,

I’m trying to convert Java code to swift and I need the AnnotationLabel’s setAxisLabelStyle equivalent.

AnnotationLabel annotationLabel = new AnnotationLabel(getContext());
annotationLabel.setLabelPlacement(LabelPlacement.Axis);

            annotationLabel.setAxisLabelStyle(new Action1<AnnotationLabel>()
            {
                @Override
                public void execute(AnnotationLabel annotationLabel)
                {
                    annotationLabel.setFontStyle(new FontStyle(37.0f, Color.BLUE));
                    annotationLabel.setBackgroundResource(R.drawable.current_price);
                }
            });

How can i apply this code in swift?

SciChart 3.1.0.5175 running on iOS 13.6

Please see this short video which demonstrates the issue: https://youtu.be/HjtWZDZeyXM

I have a chart showing a single Spline data series. The data series never drops below zero, yet the chart shows multiple points where the line drops below zero as you zoom in and out. This behavior changes as the zoom level changes.

Is this expected behavior for the spline chart? Is there a way to change the behavior so the chart does not show these sub-zero points?

private func drawChart()
{
    createChartSurface()

    let series = self.getPositionSeries( name: name, color: color, results: resultsSession.rearResults )
    self.sciChartSurface?.renderableSeries.add(series)


}


private func createChartSurface()
{
    // If we created a chart surface previously then we need to remove it from the superview
    sciChartSurface?.removeFromSuperview()

    // Create a SCIChartSurface. This is a UIView so can be added directly to the UI
    sciChartSurface = SCIChartSurface()
    sciChartSurface?.translatesAutoresizingMaskIntoConstraints = false
    self.view.addSubview(sciChartSurface!)

    //sciChartSurface?.autoresizingMask = [.flexibleHeight, .flexibleWidth] // chart bottom falls off the view without this
    sciChartSurface?.topAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.topAnchor).isActive = true
    sciChartSurface?.bottomAnchor.constraint(equalTo: self.view.safeAreaLayoutGuide.bottomAnchor).isActive = true
    sciChartSurface?.leftAnchor.constraint(equalTo: self.view.leftAnchor).isActive = true
    sciChartSurface?.rightAnchor.constraint(equalTo: self.view.rightAnchor).isActive = true

    // Create an XAxis and YAxis. This step is mandatory before creating series
    let xaxis = SCINumericAxis()
    xaxis.axisTitle = "Seconds"
    sciChartSurface?.xAxes.add(xaxis)

    let yaxis = SCINumericAxis()
    yaxis.axisTitle = "Position (mm)"
    yaxis.axisId = "p" // position
    yaxis.axisAlignment = .right
    sciChartSurface?.yAxes.add(yaxis)

    let yaxis = SCINumericAxis()
    yaxis.axisTitle = "Speed mm/s"
    yaxis.axisId = "s" // speed
    yaxis.axisAlignment = .left
    sciChartSurface?.yAxes.add(yaxis)


    addModifiers()
}


private func getPositionSeries( name: String, color: UIColor, results: ResultData ) -> SCISplineLineRenderableSeries
{
    let positionData = SCIXyDataSeries(xType: .double, yType: .double)
    positionData.seriesName = name
    let start = resultsSession.indexStart + 1
    let last = resultsSession.indexEnd

    for index in start ... last {
        let t1 = resultsSession.sensorData[index-1].time
        let t2 = resultsSession.sensorData[index].time
        if ((t2-t1) == 1) {
            let x = Double(t2) / resultsSession.sampleRate
            let y = results.axleData[index].position
            positionData.append(x: x, y: y)
        } else {
            // There was a gap in the data.  Fill in the gap with a horizontal line.
            let y = results.axleData[index-1].position
            for tx in (t1 + 1) ... t2 {
                let x = Double(tx) / resultsSession.sampleRate
                positionData.append(x:x, y:y)
            }
        }
    }

    let positionSeries = SCISplineLineRenderableSeries()  // SCIFastLineRenderableSeries()
    positionSeries.dataSeries = positionData
    positionSeries.yAxisId = "p"
    positionSeries.strokeStyle = SCISolidPenStyle(color: color, thickness: 1.0)
    return positionSeries
}

Hello,
I’m trying to convert Android (Java) code to iOS (Swift), and I need to create a custom SCIZoomPanModifier. In the android code, onFling, onDown, and onDown were overridden, but I can’t seem to do that in iOS. How can I override onFling, onDown, and onUp in iOS to mimic the android code?

Thanks

Currently we have two graph surfaces with two Y axes on each side and we need all of the Y axes to have fixed width size. Until now we were achieving that like this:
topGraphSurface.LeftAxisAreaForcedSize = 45;
topGraphSurface.RightAxisAreaForcedSize = 45;
bottomGraphSurface.LeftAxisAreaForcedSize = 45;
bottomGraphSurface.RightAxisAreaForcedSize = 45;

but since updating to the new SciChart v3 we get the error “SciChartSurface does not contain a definition for (Left)AxisAreaForcedSize”. I couldn’t find any information about this in the Migration guide, so is there a way to achieve this in the new version?

Hello

In the real-time line chart, I want an animation like the video(link below).
Can you be provided with animations such as a point where a point drawn in real time continues to blink?

https://drive.google.com/file/d/1tcSFNPwSR4XEZqMX_t8GK2vzV5NUQUcn/view?usp=sharing

I am setting SCIDateTimeAxis as my XAxis by using the code:

let xAxis = SCIDateTimeAxis()
xAxis.style.labelStyle.color = UIColor.darkGray
xAxis.textFormatting = “dd MMM”
xAxis.visibleRange = SCIDateRange(dateMin: 2019-07-29 11:30:00, max:2019-07-29 11:30:00)

As I have a requirement to change the application Language to THI.
How can I set the locale to the axis, so the label visible on the axis should displayed in THI language.

As right now it is always visible in english irrespective of the language like 1 sep, 20 sep, 10 oct, 30 oct, 20 nov .

Please help.

Thanks
Vikas Ahuja

Hello, I have tried to see if it is possible to show the rollover without showing any labels so that is is just a vertical bar. I was searching on StackOverflow and a few answers said it was not possible to omit any of the values from the graph. I did see that we can customize the cursor, is it possible to just have it be a vertical bar instead of a cross?? Then I could just use it instead of the default rollover.

I am linking a mockup we made of what we want to make. In the image, you have the graphic showing where the use as pressed, and above the graphic, we will show and update a graphic with the relevant information for that point.

Also, I will need to programmatically dismiss it so it will need to stay visible even if the user is panning or zooming.

See the screen shot (attached)

To dupe this start on the SciChart home page, select documentation, select iOS, then enter anything into the search box.

I get the same results with Chrome and Safari.

SciChart 3.1.0.5175
iOS 13.5
Xcode 10.15.5

If I am using the API incorrectly please let me know. I am not aware of any requirement to wait after using the SciChart API.

It appears the SCILegendModifier has some kind of timing bug. If you draw a chart on a surface with a legend, then clear the chart, then add another plot to the same surface you will notice the legend has stale data. However, if you clear the surface and wait a second before you add the new plot it will work as expected.

I created a sample Xcode project to demonstrate the issue. See the attachment chart.zip

I also created a video to demonstrate the issue: https://youtu.be/1JBTd1sfVgI

I have a workaround so this is not urgent, but I would like to remove the delay for my production release.

I’m tested on iPhone 8 (iOS 13.5.1) and iPad (iPadOS 13.5.1). On iPad the graph always works great but on iPhone sooner or later it always fails.

The exception is always “Thread 1: EXC_BAD_ACCESS (code=1, address=0x11d927ffc)” in the application main:

int main(int argc, char * argv[]) {
@autoreleasepool {
return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); <–
}
}

in the task stack:

SciChart`XValuesProviderWrapper<int>::GetDoubleValue:
0x103b530e0 <+0>:  ldr    x8, [x0, #0x8]
  0x103b530e4 <+4>:  ldr    w8, [x8, w1, sxtw #2]   <--
0x103b530e8 <+8>:  scvtf  d0, w8
0x103b530ec <+12>: ret

The truth is, I have no idea what’s going on. .. Please, anyone know what might be happening?

Thank you very much!

Due to the app upgrade, the code is in objective-c. This is my initialization code:

- (void) loadSciChartSurface:(SCIChartSurface*)surface {
sciChartSurface = surface;
sciChartSurface.translatesAutoresizingMaskIntoConstraints = true;

// scroll
SCIZoomPanModifier *zoomPan = [SCIZoomPanModifier new];
zoomPan.receiveHandledEvents = true;
zoomPan.zoomExtentsY = false;
zoomPan.direction = SCIDirection2D_XDirection;
[sciChartSurface.chartModifiers add:zoomPan];

// zoom
SCIPinchZoomModifier *pinchZoomModifier = [SCIPinchZoomModifier new];
pinchZoomModifier.direction = SCIDirection2D_XDirection;
pinchZoomModifier.scaleFactor = 1.5;
[sciChartSurface.chartModifiers add:pinchZoomModifier];

// series
rSeries = [SCIFastLineRenderableSeries new];
xAxis = [SCINumericAxis new];
yAxis = [SCINumericAxis new];

xAxis.visibleRangeChangeListener = ^(id<ISCIAxis> axis, id<ISCIRange> oldRange, id<ISCIRange> newRange, BOOL isAnimating) {

    int min = newRange.minAsDouble;
    int max = newRange.maxAsDouble;
    int center = (min + max) / 2;

    if (center <= 0) {
        axis.visibleRange.min = @(0.0 - xHalfWidth);
        axis.visibleRange.max = @(xWidth - xHalfWidth);
    } else if (center >= dataSamples) {
        axis.visibleRange.min = @(dataSamples - xHalfWidth);
        axis.visibleRange.max = @(dataSamples + xHalfWidth);
    } else {
        // xWith is updated to keep the zoom factor in limits, when (center <= 0) or (center >= dataSamples)
        xWidth = max - min;
        xHalfWidth = xWidth / 2;
    }
};

[SCIUpdateSuspender usingWithSuspendable:sciChartSurface withBlock:^{
    [sciChartSurface.xAxes add:xAxis];
    [sciChartSurface.yAxes add:yAxis];
    [sciChartSurface.renderableSeries add:rSeries];
    [SCIAnimations sweepSeries:rSeries duration:0.0 andEasingFunction:[SCICubicEase new]];
}];

dataSeries = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Int yType:SCIDataType_Short];

// x
xWidth = theFileFormat.mSampleRate * MIN_SECONDS_IN_GRID * 1;
xIndex = 0;
xHalfWidth = xWidth / 2;
xAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:0.0 max:xWidth];

// y
yAxis.visibleRange = [[SCIDoubleRange alloc] initWithMin:SHRT_MIN max:SHRT_MAX];

[self loadDefaultStyle];

}