This example demonstrates how to create an iOS line chart with a secondary Y-Axis. SciChart iOS supports unlimited, multiple top or bottom X-Axes and unlimited, multiple left and right Y-Axes. This example shows in a simple way how to register a line series on each axis.

To add multiple YAxis to an iOS Chart, add SCIAxisBase derived types to the SCIChartSurface.yAxes property.

You can set the alignment of any YAxis to Left, Right, Top, Bottom using the SCIAxisAlignment enumeration.

Finally, RenderableSeries can be registered on an axis using the RenderablerSeries.xAxisId, RenderableSeries.yAxisId properties.

// SecondaryYAxesChartView.m

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2019. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// SecondaryYAxesChartView.m is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

#import "SecondaryYAxesChartView.h"
#import "SCDDataManager.h"

@implementation SecondaryYAxesChartView

- (Class)associatedType { return SCIChartSurface.class; }

- (BOOL)showDefaultModifiersInToolbar { return NO; }

- (void)initExample {
    id<ISCIAxis> xAxis = [SCINumericAxis new];
    xAxis.growBy = [[SCIDoubleRange alloc] initWithMin:0.1 max:0.1];
    xAxis.axisTitle = @"Bottom Axis";
    
    id<ISCIAxis> rightYAxis = [SCINumericAxis new];
    rightYAxis.growBy = [[SCIDoubleRange alloc] initWithMin:0.1 max:0.1];
    rightYAxis.axisId = @"rightAxisId";
    rightYAxis.axisTitle = @"Right Axis";
    rightYAxis.axisAlignment = SCIAxisAlignment_Right;
    rightYAxis.tickLabelStyle = [[SCIFontStyle alloc] initWithFontSize:12 andTextColorCode:0xFF279B27];
    rightYAxis.titleStyle = [[SCIFontStyle alloc] initWithFontSize:18 andTextColorCode:0xFF279B27];
    
    id<ISCIAxis> leftYAxis = [SCINumericAxis new];
    leftYAxis.growBy = [[SCIDoubleRange alloc] initWithMin:0.1 max:0.1];
    leftYAxis.axisId = @"leftAxisId";
    leftYAxis.axisTitle = @"Left Axis";
    leftYAxis.axisAlignment = SCIAxisAlignment_Left;
    leftYAxis.tickLabelStyle = [[SCIFontStyle alloc] initWithFontSize:12 andTextColorCode:0xFF4083B7];
    leftYAxis.titleStyle = [[SCIFontStyle alloc] initWithFontSize:18 andTextColorCode:0xFF4083B7];

    SCIXyDataSeries *ds1 = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double yType:SCIDataType_Double];
    SCIXyDataSeries *ds2 = [[SCIXyDataSeries alloc] initWithXType:SCIDataType_Double yType:SCIDataType_Double];

    SCDDoubleSeries *ds1Points = [SCDDataManager getFourierSeriesWithAmplitude:1.0 phaseShift:0.1 count:5000];
    SCDDoubleSeries *ds2Points = [SCDDataManager getDampedSinewaveWithAmplitude:3.0 DampingFactor:0.005 PointCount:5000 Freq:10];
    
    [ds1 appendValuesX:ds1Points.xValues y:ds1Points.yValues];
    [ds2 appendValuesX:ds2Points.xValues y:ds2Points.yValues];
    
    SCIFastLineRenderableSeries *rSeries1 = [SCIFastLineRenderableSeries new];
    rSeries1.dataSeries = ds1;
    rSeries1.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFF4083B7 thickness:1.0];
    rSeries1.yAxisId = @"leftAxisId";
    
    SCIFastLineRenderableSeries *rSeries2 = [SCIFastLineRenderableSeries new];
    rSeries2.dataSeries = ds2;
    rSeries2.strokeStyle = [[SCISolidPenStyle alloc] initWithColorCode:0xFF279B27 thickness:2.0];
    rSeries2.yAxisId = @"rightAxisId";
    
    [SCIUpdateSuspender usingWithSuspendable:self.surface withBlock:^{
        [self.surface.xAxes add:xAxis];
        [self.surface.yAxes add:leftYAxis];
        [self.surface.yAxes add:rightYAxis];
        [self.surface.renderableSeries add:rSeries1];
        [self.surface.renderableSeries add:rSeries2];
        [self.surface.chartModifiers add:[SCDExampleBaseViewController createDefaultModifiers]];
        
        [SCIAnimations sweepSeries:rSeries1 duration:3.0 andEasingFunction:[SCICubicEase new]];
        [SCIAnimations sweepSeries:rSeries2 duration:3.0 andEasingFunction:[SCICubicEase new]];
    }];
}

@end

// SecondaryYAxesChartView.swift

//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2019. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales:   sales@scichart.com
//
// SecondaryYAxesChartView.swift is part of the SCICHART® Examples. Permission is hereby granted
// to modify, create derivative works, distribute and publish any part of this source
// code whether for commercial, private or personal use.
//
// The SCICHART® examples are distributed in the hope that they will be useful, but
// without any warranty. It is provided "AS IS" without warranty of any kind, either
// expressed or implied.
//******************************************************************************

class SecondaryYAxesChartView: SCDSingleChartViewController<SCIChartSurface> {
    
    override var associatedType: AnyClass { return SCIChartSurface.self }
    
    override var showDefaultModifiersInToolbar: Bool { return false }
    
    override func initExample() {
        let xAxis = SCINumericAxis()
        xAxis.growBy = SCIDoubleRange(min: 0.1, max: 0.1)
        xAxis.axisTitle = "Bottom Axis"
        
        let rightYAxis = SCINumericAxis()
        rightYAxis.growBy = SCIDoubleRange(min: 0.1, max: 0.1)
        rightYAxis.axisId = "rightAxisId"
        rightYAxis.axisTitle = "Right Axis"
        rightYAxis.axisAlignment = .right
        rightYAxis.titleStyle = SCIFontStyle(fontSize: 18, andTextColorCode: 0xFF279B27)
        rightYAxis.tickLabelStyle = SCIFontStyle(fontSize: 12, andTextColorCode: 0xFF279B27)
        
        let leftYAxis = SCINumericAxis()
        leftYAxis.growBy = SCIDoubleRange(min: 0.1, max: 0.1)
        leftYAxis.axisId = "leftAxisId"
        leftYAxis.axisTitle = "Left Axis"
        leftYAxis.axisAlignment = .left
        leftYAxis.titleStyle = SCIFontStyle(fontSize: 18, andTextColorCode: 0xFF4083B7)
        leftYAxis.tickLabelStyle = SCIFontStyle(fontSize: 12, andTextColorCode: 0xFF4083B7)
        
        let ds1 = SCIXyDataSeries(xType: .double, yType: .double)
        let ds2 = SCIXyDataSeries(xType: .double, yType: .double)
        
        let ds1Points = SCDDataManager.getFourierSeries(withAmplitude: 1.0, phaseShift: 0.1, count: 5000)
        let ds2Points = SCDDataManager.getDampedSinewave(withAmplitude: 3.0, dampingFactor: 0.005, pointCount: 5000, freq: 10)
        
        ds1.append(x: ds1Points.xValues, y: ds1Points.yValues)
        ds2.append(x: ds2Points.xValues, y: ds2Points.yValues)
        
        let rSeries1 = SCIFastLineRenderableSeries()
        rSeries1.dataSeries = ds1
        rSeries1.strokeStyle = SCISolidPenStyle(colorCode: 0xFF4083B7, thickness: 2.0)
        rSeries1.yAxisId = "leftAxisId"
        
        let rSeries2 = SCIFastLineRenderableSeries()
        rSeries2.dataSeries = ds2
        rSeries2.strokeStyle = SCISolidPenStyle(colorCode: 0xFF279B27, thickness: 2.0)
        rSeries2.yAxisId = "rightAxisId"
        
        SCIUpdateSuspender.usingWith(surface) {
            self.surface.xAxes.add(xAxis)
            self.surface.yAxes.add(leftYAxis)
            self.surface.yAxes.add(rightYAxis)
            self.surface.renderableSeries.add(rSeries1)
            self.surface.renderableSeries.add(rSeries2)
            self.surface.chartModifiers.add(SCDExampleBaseViewController.createDefaultModifiers())
            
            SCIAnimations.sweep(rSeries1, duration: 3.0, easingFunction: SCICubicEase())
            SCIAnimations.sweep(rSeries2, duration: 3.0, easingFunction: SCICubicEase())
        }
    }
}

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