Many have asked about how to migrate to Charts 3.0. So everything will be in the release notes soon as there will be a release, but I will write those down here for now:

This is a major release, with a few breaking changes. So please pay attention.

Updates:

• x-indexes are dead. Intoducing: x-values. Each entry now has an x and a y.
• Pie/radar charts do not have a concept of X index anymore
• Unified XAxis/YAxis features and experience.
• Unified formatter interfaces for axes.
• New formatter for y values, not inheriting from NSNumberFormatter anymore, to have dataSet and viewport information to take better formatting decisions.
• Major refactoring of the Highlight mechanism.
• Refactored marker mechanism
• Refactored legend entry mechanism
• Each dataset can now set its own legend form/size/etc.
• More demos
• Some classes have been renamed, keeping the namespaced name only in ObjC (using Swift 2.2 objc(...) feature, and the change of a major version update)
• FillFormatter now has a block representation using FillFormatter.withblock(...)
• Same goes for all Default formatters too.
• No more saveToCameraRoll(). Since Xcode 8.0 it causes "privacy" issues with Apple Review, you have to add the photo albums privacy key to your Info.plist for that.
• Moved to Swift 3.0. Make sure your project conforms to Swift 3.0.
• Many minor bug fixes and improvements

Breaking changes / how to migrate:

• All dataset constructors have changed - they do not take an array of x-indices anymore.
• All entry constructors have changed - they take in an X and a Y.
• Pie and Radar chart entries now have their own classes. So exchange the Entry classes withPieChartDataEntry/RadarChartDataEntry
• If you have any old startAtZeroEnabled calls - these have been deprecated for a long time. Replace them with axisMinimum.
• If you are using formatters:
  • Replace any chart.valueFormatter = formatter with chart.valueFormatter = ChartDefaultValueFormatter(formatter: formatter) or chart.valueFormatter = [[ChartDefaultValueFormatter alloc] initWithFormatter:formatter];
  • Replace any axis.valueFormatter = formatter with axis.valueFormatter = ChartDefaultAxisValueFormatter(formatter: formatter) or axis.valueFormatter = [[ChartDefaultAxisValueFormatter alloc] initWithFormatter:formatter];
• In general, all functions that accepted x-indices before, now accept an x-value, so you might have to adjust the names a little bit.
• Where ChartViewDelegate is implemented, update the chartValueSelected interface
• Replace drawSliceTextEnabled with drawEntryLabelsEnabled
• If you have a custom scatter shape - implement an IShapeRenderer, and put your rendering code in there
• If you have a custom marker - consider subclassing MarkerView/MarkerImage or implementing IMarker. There are more options than before now...
• If you have used barSpace before, move to using barWidth
• If you used saveToCameraRoll(), replace with UIImageWriteToSavedPhotosAlbum(chart.getChartImage(trasparent: false), nil, nil, nil)
• Some classes have been renamed for a cleaner look. They do not contain the "Chart" prefix anymore. That's for Swift only, where there are namespaces. In ObjC the names stayed the same for the sake of namespacing, using Swift 2.2's feature of @objc(name). If your compiler yells that a class does not exist, try to remove the Chart from its name. This should rarely happen, as we've chosen only the classes that are rarely instantiated by the user.

Using this thread to list the current news, issues, PRs, and state for swift 3.0 support. This post will be updated accordingly.

As Xcode beta 4 comes out, there are even more changes(#1290), seems it's much easier to convert the library after swift 3.0 released once and for all, than continuous merging from beta 1 to beta N and finally merge into master.

Xcode beta 6 has even more changes based on beta 4.. But thanks to @acegreen, we now on beta 6 now.

Therefore, I am thinking the current Swift 2.3 and 3.0 branches are just for everyone to test their apps with iOS 10 beta. Thanks for everyone who commits into 2.3 and 3.0 branch.

What branch to use?

Swift 3.0 + Charts 3.0 -> Master // this is recommended to pick :)

Swift 2.3 + Charts 2.2.5 -> Chart2.2.5-Swift2.3 branch Swift 3.0 + Charts 2.2.5 -> Chart2.2.5-Swift3.0 branch Swift 2.3 + Charts 3.0 feature ready -> Chart3.0-Swift2.3 branch

Progress

Master branch has migrated to Swift 3.0 and Chart 3.0 and this is the branch will get bug fix and new features. Other temp branches will be deleted once it's stable. Those branches are just for people to pick whatever the need to use in their project for upgrading Xcode 8, however they are not maintained, or at least only small bug fixes for Swift will kick in. Any bugs that are Chart 2.2.5 specific won't be fixed in these temp branches.

Swift-3.0 branch is based on Charts 2.2.5; has some fixes for OS X demo on Xcode 8 GM Swift-2.3 branch is sync with master(Chart v3.0 feature ready) 5e020a8f8489a8c71c2387f3334aab5fb64f2fe3 for iOS 10/macOS + Charts 3.0 on Xcode beta 6, works fine on Xcode 8 GM Chart2.2.5-Swift2.3 branch is based on Chart 2.2.5 release and converted to Swift 2.3 on Xcode beta 6 works fine on Xcode 8 GM

Open issues (up to Xcode 8 GM):

#1421 linear line chart has additional line segments wile zooming in (PR #1420) #1269: Realm swift 3.0 support is blocked due to Xcode 8 beta 3 & 4 swift compiler bug

This seems a compiler bug pending to fix. Anyone relies one Realm have to wait until this bug has been fixed. Please use Swift 2.3 to test iOS 10. Now, the code is ready (PR #1414), but pending a swift 3 Realm framework to test. #1171: I found this PR removed isDrawValuesEnabled and other similar protocol methods prefixed with 'is', that's why #1295 is removing 'is' from the function name... Watch out

function inconsistency:

Seeing different signatures for same API on macOS and iOS, such as:

NSFont: class func systemFontSize() UIFont: class var systemFontSize: CGFloat { get }

NSParagraphStyle

NSParagraphStyle: on macOS, it's: class func default() -> NSParagraphStyle on iOS, it's: class var default: NSParagraphStyle { get }

I have filed a bug 27731357 on radar. If they intended to do so, we have to wrap it.. again

Pull requests:

Swift 3.0

#1414 is merged for Realm extension issue, still need Realm to release Swift 3.0 branch to make the framework compile. #1378 is merged for migrating public to open (SE-1107) #1342 is meged for Xcode beta 6 #1294, #1295 is merged for Xcode beta 4, including project settings, ChartsRealm, ChartsDemo

If you remove all Realm related files and code, you should be able to launch ChartsDemo with Xcode beta 4 now. #1290 is merged for Xcode beta 4 #1266 is merged via #1296 due to conflicts (RunLoopMode changes)

Swift 2.3

#1389 is merged for Xcode beta 6 + Charts v3.0 code in master, at 5e020a8f8489a8c71c2387f3334aab5fb64f2fe3 #1281 is merged for Xcode beta 4

Hi, I'm making a line chart with the following example data points:

(0,0) (1,0) (5,0)

Is there a way I can get the 3 points to show up so that they're scaled properly? Right now, if I add a Data Set with 2 arrays, all 3 points are the same distance from each other. I know there's a thread about this in MPAndroidCharts, but I was wondering if anyone's figured out how to do this in iOS. Thank you so much!

Within the App I have an issue where the labels on the left axis of either a BarChartView or a LineChartView repeats.

I first added the snippet below to ensure that the number of labels on the axis does not exceed the maximum value in the y data.

self.chartView.leftAxis.labelCount = self.chartView.data.yMax > YAxisMaxLabelCount ? YAxisMaxLabelCount : self.chartView.data.yMax;

This ensured that if the maximum value in the y data was 3 then there would only be 3 labels within the axis. Now this worked fine if the graph was not interactive, i.e. the user could not zoom the chart.

As soon as the user zooms obviously the count of the labels remains the same and the value formatter fills in the gaps allowing a value to repeat.

Example of axis with no duplicated values

Example of same chart but zoomed in

The screenshots show the left axis repeating the value 2. What is your best suggestion on solving this repeating label issue? Any help would be grateful. If you need any further information let me know.

Thanks

Issue Link :link:

Rounding the corners of bars #1066

Goals :soccer:

• Add ability to draw rounded corners for BarChartView and HorizontalBarChartView.
• Support also stacked bar charts.
• Corner radius should be calculated automatically, depending on chart's width and height.
• To use it simply add dataSet.roundedCorners = [.allCorners].

Implementation Details :construction:

• Add roundedCorners property for BarChartDataSet, where you can specify which corners should be rounded.
• Introduce changes in drawDataSet function in BarChartRenderer and HorizontalBarChartRenderer, where UIBezierPath is created to clip bar filling.
• Similar changes apply to drawHighlighted function in BarChartRenderer.

Testing Details :mag:

Add testRoundedCorners test to BarChartTests.

hey @danielgindi , first of all, thanks for the awesome library. I have recently updated the library and a crash is occurring in "extension BarLineScatterCandleBubbleRenderer.XBounds: Sequence" in constructor. line is

fileprivate init(min: Int, max: Int) { -----> self.iterator = (min...max).makeIterator() }

Can you please tell me, why is it crashing and what am I doing wrong and how can I prevent it? Its astonishing that graphs have been working fine on previous versions of library.

Error on xcode debugger is: Fatal error: Can't form Range with upperBound < lowerBound

• [ x] I've read, understood, and done my best to follow the *CONTRIBUTING guidelines.

What did you do?

Upgrade from 3.6.0 to 4.0.2

What happened ?

Most drawing of charts leads to a crash when building iterator in extension BarLineScatterCandleBubbleRenderer.XBounds: Sequence because Range requires lowerBound <= upperBound

let entryTo = dataSet.entryForXValue(high, closestToY: .nan, rounding: .up) is nil. It looks like the closest found is < endIndex in the dataset.

I use custom minimum and maximum axis values and visible range.

The same code was working perfectly in v3.6. I also tried to rollback to 3.6 as a temporary workaround but the project doesn't compile anymore with XCode 13.3.

Charts Environment

Charts version/Branch/Commit Number: 4.0.2 Xcode version: 13.3 (13E113) Swift version: 5 Platform(s) running Charts: iOS macOS version running Xcode: 12.0.1 (21A559)

I am getting this error repeatedly with a HorizontalBarChartView: <Error>: CGAffineTransformInvert: singular matrix.

There is nothing special about my code. I am using a HorizontalBarChartView in OSX that is 175x394 points in size. It is not obstructed by any other views. I initialize the chart with:

@IBOutlet weak var horizontalBarChart: HorizontalBarChartView!
let data = BarChartData(xVals: [1.0, 3.0, 5.0, 7.0, 8.0])
horizontalBarChart.data = data
horizontalBarChart.notifyDataSetChanged()

and then get hit with the error multiple times a second. Any idea what is causing this?

Line 206 in ChartTransformer is the only place the CGAffineTransformInvert is called.

Hey, I'm having troubles with grouped bar chart. My barChartData are following:

x-values (array of dates): 02.júla.15, 23.júla.15, 24.júla.15

dataSets: ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 0, value 0.0, ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 0, value 0.0, ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 0, value 0.0, ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 0, value 0.0, ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 0, value 0.0, ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 1, value 39.0, ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 2, value 16.0, ChartDataSet, label: tst, 1 entries: ChartDataEntry, xIndex: 2, value 28.0

This produces almost correct result, however bars seems to have wrong position as showed in this image http://imgur.com/Vq43QFH

What am I doing wrong? :)

What did you do?

Build the project with Xcode 14 Beta 3

What did you expect to happen?

For the project to successfully build.

What happened instead?

There are 2 types of build errors

1. Build error around CandleStickChartRenderer's and RadarChartRenderer's drawData(context: CGContext) where the IndexingIterator are not equivalent. Raw message:

error build: Referencing instance method 'makeIterator()' on 'Collection' requires the types 'IndexingIterator' and 'IndexingIterator' be equivalent

2. Build error around ChartDataSet not conforming to RangeReplaceableCollection as replaceSubrange(_:with:) is missing. Raw messages:

error build: Type 'ChartDataSet' does not conform to protocol 'RangeReplaceableCollection'

error build: Unavailable instance method 'replaceSubrange(_:with:)' was used to satisfy a requirement of protocol 'RangeReplaceableCollection'

Charts Environment

Charts version/Branch/Commit Number: 4.0.3 Xcode version: Xcode 14 Beta 3 (14A5270f) Swift version: 5.7 Platform(s) running Charts: iOS macOS version running Xcode: 12.4 (21F79)

• [x] I've read, understood, and done my best to follow the *CONTRIBUTING guidelines.

What did you do?

ℹ I built my app on my physical iphone and put my computer to sleep. When I got back, without making ABSOLUTELY NO changes I built the app once more (clicked the "play" button on XCODE) and ever since I've been getting the error:

dyld: Library not loaded: @rpath/Charts.framework/Charts Referenced from: /private/var/containers/Bundle/Application/4B33D98E-3CC3-4632-8164-49F7465AFD92/Test.app/Test Reason: no suitable image found. Did find: /private/var/containers/Bundle/Application/4B33D98E-3CC3-4632-8164-49F7465AFD92/Test.app/Frameworks/Charts.framework/Charts: code signature invalid for '/private/var/containers/Bundle/Application/4B33D98E-3CC3-4632-8164-49F7465AFD92/Test.app/Frameworks/Charts.framework/Charts'

/private/var/containers/Bundle/Application/4B33D98E-3CC3-4632-8164-49F7465AFD92/Test.app/Frameworks/Charts.framework/Charts: stat() failed with errno=25
/private/var/containers/Bundle/Application/4B33D98E-3CC3-4632-8164-49F7465AFD92/Test.app/Frameworks/Charts.framework/Charts: code signature invalid for '/private/var/containers/Bundle/Application/4B33D98E-3CC3-4632-8164-49F7465AFD92/Test.app/Frameworks/Charts.framework/Charts'

/private/var/containers/Bundle/Application/4B33D98E-3CC3-4632-8164-49F7465AFD92/Test.app/Frameworks/Charts.framework/Charts: stat() failed with errno=1
/pri(lldb) 

Charts Environment

Xcode version: 11.3.1 Swift version: 5something

Issue Link :link:

If I call ChartData setValueFormatter:DefaultValueFormatter func before I call ChartView data assign(chartView.data = data), the valueFormatter won't work. Here is issue code....

let pFormatter = NumberFormatter()
pFormatter.numberStyle = .percent
pFormatter.maximumFractionDigits = 2
pFormatter.multiplier = 1
pFormatter.percentSymbol = "%"
data.setValueFont(.systemFont(ofSize: 11, weight: .light))
data.setValueTextColor(.black)
data.setValueFormatter(DefaultValueFormatter(formatter: pFormatter))
chartView.data = data

Goals :soccer:

None

Implementation Details :construction:

None

Testing Details :mag:

Just test for myself project.

How to change the background color of label on rightAxis of LineChartView. I want to give it background color and make it rounded. I am able to change the LabelTextColor.

ℹ Please fill out this template when filing an issue. All lines beginning with an ℹ symbol instruct you with what info we expect. You can delete those lines once you've filled in the info.

Per our *CONTRIBUTING guidelines, we use GitHub for bugs and feature requests, not general support. Other issues should be opened on Stack Overflow with the tag ios-charts.

Please remove this line and everything above it before submitting.

• [x] I've read, understood, and done my best to follow the *CONTRIBUTING guidelines.

What did you do?

Upgraded XCode to Version 14.2 from 13 and Charts to branch->Master from older version 3.6

What did you expect to happen?

I expected my app to run without any error and show chart as it was doing before these upgrades

What happened instead?

XCode project was built successfully after I made some code changes as per #4860 (and made few other minor changes like changing addDataSet to append) However, after the build, the simulator gets stuck and XCode throws following error after launching

Assertion failed: removeAll(keepingCapacity:) not supported for CombinedData

Error at :
Script: ChartData.swift function: removeAll LOC: assert(!(self is CombinedChartData), "(#function) not supported for CombinedData")

Charts Environment

**Charts version/Branch/Commit Number: Branch Master **Xcode version: 14.2 **Swift version: Swift 5 **Platform(s) running Charts: XCode Simulator iPhone 14 pro (iOS 16.2) **macOS version running Xcode: Ventura version 13.1 (22C65)

Demo Project

ℹ Please link to or upload a project we can download that reproduces the issue.

Hi,

since I am new to the swift language, please forgive me if my question is not making sense. I used the Chart module to draw line charts for my live data from the pressure sensor, It's working great but when my app is killed and relaunched again all the data is gone.

Please help me to go through this issue, thanks in advance!

Hi i have a currency exchange API returning the rates for selected currencies in specified date range ( in my case 10 days) . İt returns the dates as String and rates as double inside a dictionary. How can I pass these dates in x axis and rates in y axis?

I've got an index out-of-range crash in the method drawLabels of XAxisRenderer class This crash happens only if I set centerAxisLabelsEnabled to true for xAxis of my chart. I believe that the reason for this crash is in this line: With this code, the number of centered entries is always less by one compared to the axis.entries

If I remove this [..<n] part the crash doesn't happen again