iOS & macOS charts - Examples
Please note! These examples are new to SciChart iOS v4 release! SciChart’s OpenGL ES and Metal iOS and Metal macOS Chart library ships with hundred of Objective-C and Swift iOS & macOS Chart Examples which you can browse, play with and view the source-code. All of this is possible with the new and improved SciChart iOS Examples Suite and demo application for Mac, which ships as part of the SciChart SDK.
This example showcases how to effectively use the `SCIIndexDateAxis`, enabling you to plot series where data points may not be continuous in time, such as financial charts or sensor data with missing intervals.
This example plots a candlestick series alongside a moving average, with the moving average series potentially having fewer or more points than the candlestick data. This demonstrates the capability of SciChart to handle different data resolutions, align series with varying data lengths, and adjust time intervals automatically while keeping the visual representation clear and accurate.
The Swift and Objective-C source code for the iOS and macOS Easy Stock Chart with IndexDateAxis example is included below (Scroll down!).
Did you know that we have the source code for all our example available for free on Github?
Clone the SciChart.iOS.Examples from Github.
Also the SciChart iOS and Scichart macOS Trials contain the full source for the examples (link below).
IndexDateAxisChartView.swift
View source code//******************************************************************************
// SCICHART® Copyright SciChart Ltd. 2011-2023. All rights reserved.
//
// Web: http://www.scichart.com
// Support: support@scichart.com
// Sales: sales@scichart.com
//
// IndexDateAxisChartView.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 IndexDateAxisChartView: SCDSingleChartViewController<SCIChartSurface> {
override var associatedType: AnyClass { return SCIChartSurface.self }
override func initExample() {
let historicalData = SCIOhlcDataSeries(xType: .date, yType: .double)
let priceSeries = SCDDataManager.getPriceDataIndex()
let count = priceSeries.count
let dateData = priceSeries.dateData
let indexDataProvider = SCIDataSeriesIndexDataProvider(dataSeriesValues: historicalData)
let xAxis = SCIIndexDateAxis()
xAxis.setIndexDataProvider(indexDataProvider)
xAxis.visibleRange = SCIDateRange(min: dateData.getValueAt(count - 30), max: dateData.getValueAt(count - 1))
xAxis.growBy = SCIDoubleRange(min: 0.0, max: 0.1)
let yAxis = SCINumericAxis()
yAxis.autoRange = .always
yAxis.growBy = SCIDoubleRange(min: 0.0, max: 0.1)
historicalData.append(x: dateData, open: priceSeries.openData, high: priceSeries.highData, low: priceSeries.lowData, close: priceSeries.closeData)
let arrayOfDates = ["2023.01.03","2023.02.03","2023.03.02","2023.03.06","2023.03.13","2023.03.22"]
let yData = [124.17,157.38,143.90,156.30,147.70,162.14]
let formatter = DateFormatter()
let xValues = SCIDateValues()
let yValues = SCIDoubleValues()
formatter.dateFormat = "yyyy.MM.dd"
for i in 0..<arrayOfDates.count {
yValues.add(yData[i])
xValues.add(formatter.date(from: arrayOfDates[i]) ?? Date())
}
let lineDataSeries = SCIXyDataSeries(xType: .date, yType: .double)
lineDataSeries.append(x: xValues, y: yValues)
let movingAverageDataSeries = SCIXyDataSeries(xType: .date, yType: .double)
movingAverageDataSeries.append(x: dateData, y: SCDDataManager.computeMovingAverage(of: priceSeries.lowData, length: 14))
let historicalPrices = SCIFastCandlestickRenderableSeries()
historicalPrices.strokeUpStyle = SCISolidPenStyle(color: 0xAA67BDAF, thickness: 1.0)
historicalPrices.fillUpBrushStyle = SCISolidBrushStyle(color: 0xAA67BDAF)
historicalPrices.strokeDownStyle = SCISolidPenStyle(color: 0xFFDC7969, thickness: 1.0)
historicalPrices.fillDownBrushStyle = SCISolidBrushStyle(color: 0x77DC7969)
historicalPrices.dataSeries = historicalData
let lineSeries = SCIFastLineRenderableSeries()
lineSeries.dataSeries = lineDataSeries
lineSeries.strokeStyle = SCISolidPenStyle(color: 0xFFF48420, thickness: 3)
let averageSeries = SCIFastLineRenderableSeries()
averageSeries.dataSeries = movingAverageDataSeries
averageSeries.strokeStyle = SCISolidPenStyle(color: 0xFFDC7969, thickness: 2)
SCIUpdateSuspender.usingWith(surface) {
self.surface.xAxes.add(xAxis)
self.surface.yAxes.add(yAxis)
self.surface.renderableSeries.add(items: historicalPrices,lineSeries,averageSeries)
self.surface.chartModifiers.add(SCDExampleBaseViewController.createDefaultModifiers())
SCIAnimations.wave(historicalPrices, duration: 1.0, andEasingFunction: SCICubicEase())
SCIAnimations.wave(lineSeries, duration: 1.0, delay: 1.0, andEasingFunction: SCICubicEase())
SCIAnimations.wave(averageSeries, duration: 1.0, delay: 1.0, andEasingFunction: SCICubicEase())
}
}
}
