Category: iOS

I am considering applying server-side licensing for my javerScript application.

In the document below, there is a phrase “Our server-side licensing component is written in C++.”
(https://support.scichart.com/index.php?/Knowledgebase/Article/View/17256/42/)

However, there is only asp.net sample code on the provided github.
(https://github.com/ABTSoftware/SciChart.JS.Examples/tree/master/Sandbox/demo-dotnet-server-licensing)

I wonder if there is a sample code implemented in C++ for server-side licensing.

Can you provide c++ sample code?
Also, are there any examples to run on Ubuntu?

I will continue to this question here, but with more details. So I need to be able to drag axis annotations separately. Is there any possible way to achieve this in iOS? Basically I subclassed SCIAxisMarkerAnnotation and implemented my own -onPanGesture:At: but it does not separate instances of the class when I try to drag one of the annoation. All moves to same place. How can I detect which annotation is being dragged?

CDAxisMarkerAnnotation.h

#import <SciChart/SciChart.h>
@class CDAxisMarkerAnnotation;

@protocol CDAxisMarkerAnnotationDelegate <NSObject>

- (void)axisMarkerAnnotation:(CDAxisMarkerAnnotation *)axisMarkerAnnotation
           didPanToAxisValue:(double)axisValue;

@end

@interface CDAxisMarkerAnnotation : SCIAxisMarkerAnnotation

@property (weak, nonatomic) id<CDAxisMarkerAnnotationDelegate> delegate;

@end

CDAxisMarkerAnnotation.m

#import "CDAxisMarkerAnnotation.h"

@implementation CDAxisMarkerAnnotation

- (BOOL)onPanGesture:(UIPanGestureRecognizer *)gesture At:(UIView *)view
{
    if (![view isKindOfClass:[SCIChartSurfaceView class]]) {
        return [super onPanGesture:gesture At:view];
    }

    switch (gesture.state) {
        case UIGestureRecognizerStateBegan:
        case UIGestureRecognizerStateChanged:
        case UIGestureRecognizerStateEnded: {
            CGPoint location = [gesture locationInView:view];
            id<SCIRenderSurface> renderSurface = [self.parentSurface renderSurface];
            CGPoint pointInChart = [renderSurface pointInChartFrame:location];
            id<SCICoordinateCalculator> yCalculator = [self.yAxis getCurrentCoordinateCalculator];
            double valueForYAxis = [yCalculator getDataValueFrom:pointInChart.y];
            [self.delegate axisMarkerAnnotation:self didPanToAxisValue:valueForYAxis];
            break;
        }
        default: {
            break;
        }
    }
    return YES;
}

@end

Thanks,
Irmak

I’m developing chart with sci chart. And I current make candle stick chart.

I want to get correct center coordinate from user’s touch location.

so, I tried this way.

1. get touch location
2. get axis data from touch location like this
3. get coordinate from data

let location = gestureRecognizer.location(in: self) // type is CGPoint
let selectedDate = xAxis.getDataValue(Float(location.x)) // xAxis's type is ISCIAxis
let selectedPoint = xAxis.getCoordinate(selectedData)

If I do that, no matter how far to the right you touch from the center line of the candlestick, you will get the position of the left candlestick.

If the candlestick center line is not crossed, the left data is unconditionally obtained.

I want to get the data closest to the touch, how do I do that?

I want to make label on yAxis.
SCIChart provides AxisMarkerAnnotation, but I want to use CustomAnnotation because I need something custom.
So I tried drawing a CustomAnnotation on the yAxis but failed.
Android succeeds in drawing CustomAnnotation on the yAxis using the method below, but iOS doesn’t provide it?
On iOS, Can’t customAnnotation only set the value of the yAxis like AxisMarkerAnnotation?
Android was possible…

error message like this
Exception raised with reason: CALayer position contains NaN: [nan 248.71]. Layer: <CALayer:0x280c10bc0; position = CGPoint (0 0); bounds = CGRect (0 0; 0 0); delegate = <BTChart.CurrentPriceAnnotationView: 0x13d74d8f0; frame = (0 0; 0 0); layer = <CALayer: 0x280c10bc0>>; sublayers = (<_UILabelLayer: 0x282d15860>); opaque = YES; allowsGroupOpacity = YES; >

Hi. I’m currently working with sci chart iOS.

I create a custom crosshair modifier and get satisfactory results for most movements.

That crosshair by referring to your finance app, and one problem is that when the finger dragging the crosshair moves to the axis surface area, the crosshair movement stops.

It is true that the crosshair is only drawn on the chart surface, but I think I should continue to receive events even if it crosses the axis surface while dragging. How do I do that?

And another Q2. how to pause crosshair dragging event?

When I have multiple chart(vertical group), If I turn on crosshair and I start resizing dragging, crosshair is update according to dragging.

I hope just stop crosshair, but visible state. How can I do that?

Hi,

I’m using SciChart for macOS (v4.4.2.5871 installed via CocoaPods) and one thing that I tried was to implement the an axis to show full extent of data, as described in the first bullet of https://www.scichart.com/documentation/ios/current/axis-ranging—get-or-set-visiblerange.html#zooming-to-fit-all-the-data

However, what I’m getting is that after setting the visibleRange to match the dataRange, the dataRange no longer reflects the “true” range, but something else. Also “zoom to extent” no longer works

Attached is a super basic example (project) for this. To reproduce, do the following:

1. Do a zoom (via pinch)
2. Click the button titled “Set visibleRange to dataRange” -> this step works as expected
3. Do a zoom
4. Click again the button -> “zoom to extent” no longer works, dataRange is messed up

Hi, I’m looking for a way to programmatically dismiss a RolloverModifier from a chart. I’ve been tasked with creating a user experience that does two things: 1. when a user stops scrubbing on the chart, the rollover modifier should persist, and 2. when the user taps outside of the chart the rollover modifier should disappear.

I’ve accomplished the first part of the problem by implementing a subclass of SCIRolloverModifier and overriding the onEvent(args:) function, but I cannot figure out how to dismiss the rollover modifier when the user taps outside the chart surface.

Is there a way to accomplish this?

Greetings! I see you have support Xamarin.iOS and Xamarin.Android, however, I’m not sure about support status: do you support .NET 7 iOS and Android?

I work on a SwiftUI project that has integrated SciCharts.

What I’ve noticed is that while there are SwiftUI examples available, they are rather basic and when I replicate the example code over in my project, it does not run as we expect and in some cases does not run at all.

Currently there seems to be issues with the SwiftUI run loop, SwiftUI’s use of structs, and SciCharts use of pointers that make building complex charts within complex user interfaces rather challenging.

I needed to do a lot of work to get the SwiftUI example code to work in my project, and we’re still facing some challenges. Can we expect better SwiftUI support in the future, such as SwiftUI views included in the SDK or if this work has been done can the documentation be linked?

Hello there,

I am new to SciChart and trying to implement custom SCICursorModifiers tooltip,

It’s almost done, except one issue, i.e I am not able to hide the X axis (or) Horizontal line which is in green colour, it is showing up in the background whenever I am trying to use the tooltip.

The line which needs to be hidden

I tried with following below code but it is not working

extension SCIChartTheme {
    static let berryBlue: SCIChartTheme = SCIChartTheme(rawValue: "SciChart_SciChartv4DarkStyle")
}

SCIThemeManager.addTheme(.berryBlue, from: Bundle.main)

Is there any way to achieve this

Thanks in Advance

Hello,

I recently updated 2 different apps that both use SciChart with XCode14 and uploaded the archives to the App Store via Organizer. They both generated the warning/error:

“The app references non-public selectors in …/Frameworks/SciChart.framework/SciChart: moveToX:y:”

This did not occur with Xcode 13.

Any advice on how best to handle this?

Thank you.

I am trying to place a legend outside a Piechart without success. When I create the legend modifier like below everything works as expected:

    let legendModifier = SCIPieChartLegendModifier()
    legendModifier.sourceSeries = renderableSeries
    legendModifier.margins = UIEdgeInsets(top: 17, left: 17, bottom: 17, right: 17)
    legendModifier.position = [.bottom, .centerHorizontal]

However when I try to place it outside like below the app crashes with:
NSInvalidArgumentException’, reason: ‘-[SCIPieSegment seriesName]: unrecognized selector sent to instance 0x281881500

    legend = SCIChartLegend()
    legend.backgroundColor = SCIColor(.red)
    let dataSource = SCISeriesInfoLegendDataSource(legend: legend)
    legendModifier = SCIPieChartLegendModifier(legend: legend, dataSource: dataSource, useAutoPlacement: false)
    legendModifier.sourceSeries = renderableSeries.series
    legendModifier.margins = UIEdgeInsets(top: 17, left: 17, bottom: 17, right: 17)
    legendModifier.position = [.left, .top]

Note: I am using SwiftIUI and add the legend container to the swiftui view wrapped in an UIViewRepresentable

UIViewRepresentable(container: legend.container!)

if i comment out legendModifier.sourceSeries = renderableSeries.series the crash does not appear but the legend does not show.

How can I format the percentage values in the pie chart segments to omit the decimals? e.g i want it to show 20% instead of 20.00%. The values I pass in are always rounded

Hello,

I found a bug where the SCILegendModifier doesn’t display the full series name. If I add 5 spaces to the series name string, I’m able to see the full series name.

Also, when using margins on the legend modifier instance, the legend fills all available space. Manually resizing the window fixes this bug.

See the photos.

Hello,

One thing I can’t figure out is why I don’t see the axis tooltips when using SCIRolloverModifier or SCICursorModifier? If I use xAxis.axisTitleMargins = NSEdgeInsets(top: 1000, left: 0, bottom: 10, right: 0) I can see tooltips on x axis but only until some point and from there moving the cursor to the right leads to some sort of overlay and tooltip disappears. See the photos.

Is this a bug or I’m doing something wrong?

Hello, I’m new to Swift and macOS, but I’m tasked to research SciChart. I have started my macOS trial, got my trial code from the wizard app. I’m following the Creating your first SciChart macOS App tutorial but I get Sorry! Your license token appears to be invalid error.

Here is what I’ve tried:

import Cocoa
import SciChart
import AppKit

@main
class AppDelegate: NSObject, NSApplicationDelegate {

//    override init() {
//        SCIChartSurface.setRuntimeLicenseKey("XXX")
//    }

    func applicationDidFinishLaunching(_ aNotification: Notification) {
        let licenseKey = "XXX"
        SCIChartSurface.setRuntimeLicenseKey(licenseKey)
    }

    func applicationWillTerminate(_ aNotification: Notification) {
        // Insert code here to tear down your application
    }

    func applicationSupportsSecureRestorableState(_ app: NSApplication) -> Bool {
        return true
    }
}

Using override init() leads to Terminating app due to uncaught exception 'License Exception', reason: ''
Using SCIChartSurface.setRuntimeLicenseKey() in applicationDidFinishLaunching leads to Sorry! Your license token appears to be invalid. Please contact support with your OrderID if you believe this to be incorrect.

What am I doing wrong?

I am trying to listen changes in pie chart segment selections. I am adding the listener like so:

piesegment.addChangeListener { changedSegment in
    print("changed selection \(changedSegment.isSelected)")
 } 

The closure is never called however. My first question is: Is this the right way of doing this? In Android I implement the PieSegmentChangeListener interface and do an addIsSelectedChangeListener on the segment. In ios the SCIPieSegmentChangeListener is not a protocol. My second question is: How can I create a my own listener like in android and add it to the segment?

By the way support should not be exired!!!!

Trying to install SciChart using the PodSpecs-Nightly repo:

source ‘https://github.com/ABTSoftware/PodSpecs-Nightly.git’

Running pod install results in this error:

[!] Error installing SciChart
[!] /usr/bin/curl -f -L -o /var/folders/mr/0skn4y5d1t99bcvzd09g_wdr0000gn/T/d20221220-30745-gfzfrf/file.zip https://github.com/ABTSoftware/PodSpecs-Nightly/releases/download/v4.4.1-nightly.5867/SciChart_iOS_4.4.1-nightly.5867.zip --create-dirs --netrc-optional --retry 2 -A 'CocoaPods/1.11.3 cocoapods-downloader/1.6.3'
curl: (22) The requested URL returned error: 404

Notice the word “SDK” is missing from the URL above. The correct URL should be:

https://github.com/ABTSoftware/PodSpecs-Nightly/releases/download/v4.4.1-nightly.5867/SciChart_iOS_SDK_4.4.1-nightly.5867.zip

I download the iOS library via cocoapods. Today running ‘pod update’ results in the error below. It seems the ZIP file is not available on the server.

Installing SciChart 4.4.1.5847 (was 4.4.1.5840)
[!] Error installing SciChart
[!] /usr/bin/curl -f -L -o /var/folders/mr/0skn4y5d1t99bcvzd09g_wdr0000gn/T/d20221217-6770-1dkgzs/file.zip https://github.com/ABTSoftware/PodSpecs/releases/download/v4.4.1.5847/SciChart_iOS_4.4.1.5847.zip --create-dirs --netrc-optional --retry 2 -A 'CocoaPods/1.11.3 cocoapods-downloader/1.6.3'

curl: (22) The requested URL returned error: 404

I tried to download the zip file manually and it failed. When I modified the URL to download the previous release (4.4.1.5840) it worked.

What’s the new (Swift) signature for V2’s updateDataContext(withContext label: SCIDefaultTickLabel!, data dataValue: SCIGenericType, style: SCITextFormattingStyle!) -> SCITickLabelProtocol!? Obviously the SciGenericType is different.

My searches aren’t pulling up anything except hits on the V2 documentation, and all of those now 404.

I’m using that call to put gesture recognizers on some tick labels. I want those gesture recognizers to be different than the one I’m putting on the entire chart. And I need to update the locations every time theX axis changes. An alternate way to achieve this would also be welcome.

Hello,
I’ve been looking for the documentation of how to customize the look of the chart. I have a black/dark gray checker pattern that seems to be the default. I would like to:
1. Change the background to white, no checkerboard pattern
here is the documentation for chart background but it does not show me how to change it to white. https://www.scichart.com/documentation/ios/v2.x/webframe.html#The%20SciChartSurface%20Type.html
I have found through experimentation the I can call

surface.backgroundColor

But that just changes the axis background color

2. Make the text larger on the axis.
here is the documentation for the axis https://www.scichart.com/documentation/ios/v2.x/webframe.html#Adding%20an%20Axis%20to%20a%20SciChartSurface.html
I see these lines that were provided but they won’t compile because Xcode doesn’t know what defaultFontSize is and there are no other references to it and I still don’t see a way to set the size.

textFormat.fontName = SCSFontsName.defaultFontName
textFormat.fontSize = SCSFontSizes.defaultFontSize

I think it would be helpful to create a walkthrough for iOS that shows how to customize the background and axis. I’ve looked through the samples provided but the files are huge and I get lost trying to figure it out.
Thanks,
Warren

Ran “pod update” this morning and got a 404 error with SciChart 4.4.0.5839 (see below)

So I changed my podspec to specify an earlier version of SciChart (4.4.0.5778) and ran update again and it was successful. This is just an FYI to report the problem, it is not blocking the team.

My environment: MacOS 12.4, Xcode 13.4, cocoapods 1.11.3

[!] Error installing SciChart
[!] /Users/mjc/opt/anaconda3/bin/curl -f -L -o /var/folders/mr/0skn4y5d1t99bcvzd09g_wdr0000gn/T/d20220713-25489-xbnbcz/file.zip https://github.com/ABTSoftware/PodSpecs/releases/download/v4.4.0.5839/SciChart_iOS_4.4.0.5839.zip –create-dirs –netrc-optional –retry 2 -A ‘CocoaPods/1.11.3 cocoapods-downloader/1.5.1’

% Total % Received % Xferd Average Speed Time Time Time Current
Dload Upload Total Spent Left Speed
0 9 0 0 0 0 0 0 –:–:– –:–:– –:–:– 0
curl: (22) The requested URL returned error: 404