Tag: swift

Hi everyone,

I’m currently working on a project where I need to plot a candlestick chart, but I’m running into some trouble with the layout. Specifically, I’m trying to display the candlestick chart in the left two-thirds of the plot, leaving the right one-third of the plot available for annotations and other elements. The issue I’m facing is that the candlesticks are still being drawn in the right third of the plot, which is something I want to avoid.

I’ve attached an example image showing how it should look.

Currently, the chart displays the end of the data, and when you horizontally scroll, the buttons on the right side get pushed further right (because they are set using custom annotations on specific x and y axes positions), and the candlestick chart starts appearing in the right section.

Is there a way to set it up so that the candlestick chart does not render in the right section, but everything else (like the annotations and buttons) still does?

Has anyone here tackled a similar problem or knows how to prevent the candlesticks from being drawn in the right third while keeping that space available for other elements? Any advice or code examples would be greatly appreciated!

Thanks in advance!

Hello,

I have a problem reading the position of the vertical line annotations. The function “getX1” returns type double (0 – 1) or date depending on whether the annotation has not changed its position. I found out from the documentation that the type returned depends on the coordinateMode. I set it to absolute. This change had no effect, unlike in library written in Java. Is it possible to set the default type? Can I ask for any guidance needed to solve the problem? The version of the library I am using is 4.4.2.5871.

Thanks in advance!
Paweł

Hi,

I am using sci chart version 2.2.1.2256 in that I am getting date wrong, I have attached image please go through it.Here I am sending previously how I am getting date and now what I am getting.

I am using date formatter “dd/MM/yyyy”

finalDateStr = “29/08/2016” and finalWeightStr = “76.7”

dataSeries.appendX(SCIGeneric(dateFormatt.date(from: finalDateStr)!), y: SCIGeneric(finalWeightStr))

Working on building a candlestick chart in Swift. I have a working chart following the example. I get zoom and pan fine. But am getting an error when I swipe left on the chart. Can’t quite figure out what I’m missing. Seems like my data is unsorted but I don’t see any documentation on how it should be sorted and glad to send the repo if you like…
Thanks much – Warren

2017-09-14 14:31:39.426976-0700 GoogleStockAPI[7040:2331198] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: 'Unsorted data occurs in the collection. The only allowed SearchMode is SCIArraySearchMode_Exact'

*** First throw call stack:
(0x18a2c6fe0 0x188d28538 0x1013c9644 0x101422af0 0x1013fbdb0 0x101421b28 0x1013fb7c8 0x101398be8 0x101399084 0x10142dd04 0x1013effd0 0x1013a22dc 0x10140a47c 0x101419f04 0x1023f44fc 0x18d4d95dc 0x18d4d948c 0x18a533b9c 0x18a25d960 0x18a275ae4 0x18a275284 0x18a272d98 0x18a1a2da4 0x18bc0d074 0x19045dc9c 0x1000ceb1c 0x1891b159c)
libc++abi.dylib: terminating with uncaught exception of type NSException

I am getting my data for this chart from a live API and after I parse the JSON I populate it with this as
Date, Double, Double, Double, Double, and it looks like this –

Date OHLC: 2017-04-27 07:00:00 +0000 143.9225 144.16 143.31 143.79
Date OHLC: 2017-04-26 07:00:00 +0000 144.47 144.6 143.3762 143.68

Here is the function to render the series

fileprivate func getCandleRenderSeries(_ isReverse: Bool,
                                       upBodyBrush: SCISolidBrushStyle,
                                       upWickPen: SCISolidPenStyle,
                                       downBodyBrush: SCISolidBrushStyle,
                                       downWickPen: SCISolidPenStyle,
                                       count: Int) -> SCIFastCandlestickRenderableSeries {

    let ohlcDataSeries = SCIOhlcDataSeries(xType: .dateTime, yType: .double)

    ohlcDataSeries.acceptUnsortedData = true

    let items = self.dataFeed.lastPrice

    let dateFormatter = DateFormatter()

    dateFormatter.dateFormat = "yyyy-MM-dd"

    for i in 0..<(items.count) - 1 {

        let date:Date = dateFormatter.date(from: items[i].date!)!

        ohlcDataSeries.appendX(SCIGeneric(date),
                               open: SCIGeneric(items[i].open!),
                               high: SCIGeneric(items[i].high!),
                               low: SCIGeneric(items[i].low!),
                               close: SCIGeneric(items[i].close!))
    }

    let candleRendereSeries = SCIFastCandlestickRenderableSeries()
    candleRendereSeries.dataSeries = ohlcDataSeries
    candleRendereSeries.fillUpBrushStyle = upBodyBrush
    candleRendereSeries.fillDownBrushStyle = downBodyBrush
    candleRendereSeries.strokeUpStyle = upWickPen
    candleRendereSeries.strokeDownStyle = downWickPen

    return candleRendereSeries
}