In creating a sequenced gesture combining a LongPressGesture and a DragGesture, I found that the combined gesture exhibits two problems: The @GestureState does not properly update as the gesture progresses through its phases. Specifically, the updating(_:body:) closure (documented here) is only ever executed during the drag interaction. Long presses and drag-releases do not call the updating(_:body:) closure. Upon completing the long press gesture and activating the drag gesture, the drag gesture remains empty until the finger or cursor has moved. The expected behavior is for the drag gesture to begin even when its translation is of size .zero. This second problem – the nonexistence of a drag gesture once the long press has completed – prevents access to the location of the long-press-then-drag. Access to this location is critical for displaying to the user that the drag interaction has commenced. The below code is based on Apple's example presented here. I've highlighted the failure points in the code with // *. My questions are as follows: What is required to properly update the gesture state? Is it possible to have a viable drag gesture immediately upon fulfilling the long press gesture, even with a translation of .zero? Alternatively to the above question, is there a way to gain access to the location of the long press gesture? import SwiftUI import Charts enum DragState { case inactive case pressing case dragging(translation: CGSize) var isDragging: Bool { switch self { case .inactive, .pressing: return false case .dragging: return true } } } struct ChartGestureOverlay<Value: Comparable & Hashable>: View { @Binding var highlightedValue: Value? let chartProxy: ChartProxy let valueFromChartProxy: (CGFloat, ChartProxy) -> Value? let onDragChange: (DragState) -> Void @GestureState private var dragState = DragState.inactive var body: some View { Rectangle() .fill(Color.clear) .contentShape(Rectangle()) .onTapGesture { location in if let newValue = valueFromChartProxy(location.x, chartProxy) { highlightedValue = newValue } } .gesture(longPressAndDrag) } private var longPressAndDrag: some Gesture { let longPress = LongPressGesture(minimumDuration: 0.2) let drag = DragGesture(minimumDistance: .zero) .onChanged { value in if let newValue = valueFromChartProxy(value.location.x, chartProxy) { highlightedValue = newValue } } return longPress.sequenced(before: drag) .updating($dragState) { value, gestureState, _ in switch value { case .first(true): // * This is never called gestureState = .pressing case .second(true, let drag): // * Drag is often nil // * When drag is nil, we lack access to the location gestureState = .dragging(translation: drag?.translation ?? .zero) default: // * This is never called gestureState = .inactive } onDragChange(gestureState) } } } struct DataPoint: Identifiable { let id = UUID() let category: String let value: Double } struct ContentView: View { let dataPoints = [ DataPoint(category: "A", value: 5), DataPoint(category: "B", value: 3), DataPoint(category: "C", value: 8), DataPoint(category: "D", value: 2), DataPoint(category: "E", value: 7) ] @State private var highlightedCategory: String? = nil @State private var dragState = DragState.inactive var body: some View { VStack { Text("Bar Chart with Gesture Interaction") .font(.headline) .padding() Chart { ForEach(dataPoints) { dataPoint in BarMark( x: .value("Category", dataPoint.category), y: .value("Value", dataPoint.value) ) .foregroundStyle(highlightedCategory == dataPoint.category ? Color.red : Color.gray) .annotation(position: .top) { if highlightedCategory == dataPoint.category { Text("\(dataPoint.value, specifier: "%.1f")") .font(.caption) .foregroundColor(.primary) } } } } .frame(height: 300) .chartOverlay { chartProxy in ChartGestureOverlay<String>( highlightedValue: $highlightedCategory, chartProxy: chartProxy, valueFromChartProxy: { xPosition, chartProxy in if let category: String = chartProxy.value(atX: xPosition) { return category } return nil }, onDragChange: { newDragState in dragState = newDragState } ) } .onChange(of: highlightedCategory, { oldCategory, newCategory in }) } .padding() } } #Preview { ContentView() } Thank you!

I'm trying to make a Swift Chart where 24 AreaMarks an hour apart on X axis over a day display a vertical gradient. The gradient is vertical and is essentially [Color.opacity(0.1),Colour,Color.opacity(0.1] The idea here is where the upper and lower points of each AreaMark are the same or close to each other in the Y axis, the chart essentially displays a line, where they are far apart you get a nice fading vertical gradient. However, it seems that the .alignsMarkStylesWithPlotArea modifier is always set for AreaMarks even if manually applying it false. Investigating further, I've learnt that with AreaMarks in a series, Swift Charts seems to only listen to the first foreground style set in. I've created some sample code to demonstrate this. struct DemoChartView: View { var body: some View { Chart { AreaMark(x: .value("Time", Date().addingTimeInterval(0)), yStart: .value("1", 40), yEnd: .value("2", 60)) .foregroundStyle(LinearGradient(colors: [.pink, .teal], startPoint: .top, endPoint: .bottom)) .alignsMarkStylesWithPlotArea(false) AreaMark(x: .value("Time", Date().addingTimeInterval(3600)), yStart: .value("1", 44), yEnd: .value("2", 58)) .foregroundStyle(LinearGradient(colors: [.orange, .yellow], startPoint: .top, endPoint: .bottom)) .alignsMarkStylesWithPlotArea(false) AreaMark(x: .value("Time", Date().addingTimeInterval(03600*2)), yStart: .value("1", 50), yEnd: .value("2", 90)) .foregroundStyle(LinearGradient(colors: [.green, .blue], startPoint: .top, endPoint: .bottom)) .alignsMarkStylesWithPlotArea(false) } } } Which produces this: So here, all the different .foregroundStyle LinearGradients are being ignored AND the .alignsMarkStylesWithPlotArea(false) is also ignored - the amount of pink on the first mark is different to the second and third 🤷‍♂️ Has anyone encountered this. Are AreaMarks the correct choice or are they just not setup to create this type of data display. Thanks

Hi, I'm trying to create a visualization using charts for vision pro. I want to create a line chart that connects pair of points on a donut chart. So i'm trying to draw the lines radially but it seems that the line chart always has only the bottom left corner of the view as origin. How can I tranform the origin to center of the view?

Is there a way to workaround this issue? Can I revert back to Beta 1? Failed to build module 'Charts'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.41 clang-1600.0.24.1)', while this compiler is 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.9.11 clang-1600.0.26.2)'). Please select a toolchain which matches the SDK.

Using just basic rule .chartScrollableAxes(.horizontal) .chartXVisibleDomain(length: 6) Feature is working fine for iOS 17.x devices

Failed to build module 'Charts'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.41 clang-1600.0.24.1)', while this compiler is 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.9.11 clang-1600.0.26.2)'). Please select a toolchain which matches the SDK. Any fix yet?

I can't figure out if I've found a VoiceOver problem with Swift Charts or if I'm doing something incorrectly. I have a loop within a loop showing 2 sets of data in the same chart. If I touch a month then VO correctly says there are two data series. But if I keep swiping down only data from the first series is read. ChatGPT said try referencing the outer loop and sure enough that worked if it done in BOTH the label and value. It sounds really awkward though. For example, "High 89 degrees F High October". Below the "bad" chart only says something such as "92 degrees F October" when swiping down. The "good" chart will read the high and low temperature data. VStack { headerText("BAD") Chart { ForEach(processedMonthlyInput) { oneMonth in ForEach(oneMonth.temperatures, id: \.month) { element in LineMark( x: .value("Month", element.month, unit: .month), y: .value("Temperature", element.tempVal.converted(to: .fahrenheit).value) ) .accessibilityLabel("\(element.month.formatted(.dateTime.month(.wide)))") .accessibilityValue(Text("\(element.tempVal.converted(to: tempUnit).formatted(.measurement(width: .abbreviated, numberFormatStyle: .number.precision(.fractionLength(0)))))")) } .symbol(by: .value("Type", oneMonth.theType)) .foregroundStyle(by: .value("Type", oneMonth.theType)) .interpolationMethod(.catmullRom) } } .frame(maxHeight: paddingAmount) .padding(.horizontal) headerText("GOOD") Chart { ForEach(processedMonthlyInput) { oneMonth in ForEach(oneMonth.temperatures, id: \.month) { element in LineMark( x: .value("Month", element.month, unit: .month), y: .value("Temperature", element.tempVal.converted(to: .fahrenheit).value) ) .accessibilityLabel("\(oneMonth.theType) \(element.month.formatted(.dateTime.month(.wide)))") .accessibilityValue(Text("\(oneMonth.theType) \(element.tempVal.converted(to: tempUnit).formatted(.measurement(width: .abbreviated, numberFormatStyle: .number.precision(.fractionLength(0)))))")) } .symbol(by: .value("Type", oneMonth.theType)) .foregroundStyle(by: .value("Type", oneMonth.theType)) .interpolationMethod(.catmullRom) } } .frame(maxHeight: paddingAmount) .padding(.horizontal) }

Unable to compile app that imports Swift UI Charts SDK on Xcode Version 16.1 beta 2 (16B5014f) with error: Failed to build module 'Charts'; this SDK is not supported by the compiler (the SDK is built with 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.7.41 clang-1600.0.24.1)', while this compiler is 'Apple Swift version 6.0 effective-5.10 (swiftlang-6.0.0.9.11 clang-1600.0.26.2)'). Please select a toolchain which matches the SDK. FB15161667

Hello there! I wanted to give a native scrolling mechanism for the Swift Charts Graph a try and experiment a bit if the scenario that we try to achieve might be possible, but it seems that the Swift Charts scrolling performance is very poor. The graph was created as follows: X-axis is created based on a date range, Y-axis is created based on an integer values between moreless 0-320 value. the graph is scrollable horizontally only (x-axis), The time range (x-axis) for the scrolling content was set to one year from now date (so the user can scroll one year into the past as a minimum visible date (.chartXScale). The X-axis shows 3 hours of data per screen width (.chartXVisibleDomain). The data points for the graph are generated once when screen is about to appear so that the Charts engine can use it (no lazy loading implemented yet). The line data points (LineMark views) consist of 2880 data points distributed every 5 minutes which simulates - two days of continuous data stream that we want to present. The rest of the graph displays no data at all. The performance result: The graph on the initial loading phase is frozen for about 10-15 seconds until the data appears on the graph. Scrolling is very laggy - the CPU usage is 100% and is unacceptable for the end users. If we show no data at all on the graph (so no LineMark views are created at all) - the result is similar - the empty graph scrolling is also very laggy. Below I am sharing a test code: @main struct ChartsTestApp: App { var body: some Scene { WindowGroup { ContentView() Spacer() } } } struct LineDataPoint: Identifiable, Equatable { var id: Int let date: Date let value: Int } actor TestData { func generate(startDate: Date) async -> [LineDataPoint] { var values: [LineDataPoint] = [] for i in 0..<(1440 * 2) { values.append( LineDataPoint( id: i, date: startDate.addingTimeInterval( TimeInterval(60 * 5 * i) // Every 5 minutes ), value: Int.random(in: 1...100) ) ) } return values } } struct ContentView: View { var startDate: Date { return endDate.addingTimeInterval(-3600*24*30*12) // one year into the past from now } let endDate = Date() @State var dataPoints: [LineDataPoint] = [] var body: some View { Chart { ForEach(dataPoints) { item in LineMark( x: .value("Date", item.date), y: .value("Value", item.value), series: .value("Series", "Test") ) } } .frame(height: 200) .chartScrollableAxes(.horizontal) .chartYAxis(.hidden) .chartXScale(domain: startDate...endDate) // one year possibility to scroll back .chartXVisibleDomain(length: 3600 * 3) // 3 hours visible on screen .onAppear { Task { dataPoints = await TestData().generate(startDate: startDate) } } } } I would be grateful for any insights or suggestions on how to improve it or if it's planned to be improved in the future. Currently, I use UIKit CollectionView where we split the graph into smaller chunks of the graph and we present the SwiftUI Chart content in the cells, so we use the scrolling offered there. I wonder if it's possible to use native SwiftUI for such a scenario so that later on we could also implement some kind of lazy loading of the data as the user scrolls into the past.

Feedback FB14988865 Looks like in the latest version of Xcode 16.1 SwiftCharts crashes on launch. Below are the crashlogs. dyld[88826]: Symbol not found: _$s6Charts12BuilderTupleVyxxQp_QPGAA8AxisMarkAARvzAaERzlMc Referenced from: <01BB785A-84AF-3689-A614-DBFEB6A9733F> /Users/xxxx/Library/Developer/CoreSimulator/Devices/A6841249-F73B-45F2-AB68-96F94D75ACF7/data/Containers/Bundle/Application/E88B6681-E933-48AC-920A-150106F12A1F/xxxxx/xxxxx.debug.dylib Expected in: <35624EEC-5BA2-3545-B05D-BABFE6661F1B> /Library/Developer/CoreSimulator/Volumes/iOS_22A5326g/Library/Developer/CoreSimulator/Profiles/Runtimes/iOS 18.0.simruntime/Contents/Resources/RuntimeRoot/System/Library/Frameworks/Charts.framework/Charts It looks related to using AxisMarks to create custom axis.

SwiftUI Charts automatically groups accessibility elements on the graph (Double / Date for example) when there's a lot of data, which overrides the accessibilityLabel and value I set for each data point. This makes sense, but how do we modify the chart navigation accessibility readout when this grouping occurs? Here's an example: var body: some View { let salesData: [(Date, Double)] = [ (Date().addingTimeInterval(-1 * 24 * 60 * 60), 1200), (Date().addingTimeInterval(-2 * 24 * 60 * 60), 1500), (Date().addingTimeInterval(-3 * 24 * 60 * 60), 1000), (Date().addingTimeInterval(-4 * 24 * 60 * 60), 500), (Date().addingTimeInterval(-5 * 24 * 60 * 60), 1500), (Date().addingTimeInterval(-6 * 24 * 60 * 60), 1400), (Date().addingTimeInterval(-7 * 24 * 60 * 60), 1300), (Date().addingTimeInterval(-8 * 24 * 60 * 60), 1800), (Date().addingTimeInterval(-9 * 24 * 60 * 60), 500), (Date().addingTimeInterval(-10 * 24 * 60 * 60), 800), (Date().addingTimeInterval(-11 * 24 * 60 * 60), 800), (Date().addingTimeInterval(-12 * 24 * 60 * 60), 1000), (Date().addingTimeInterval(-13 * 24 * 60 * 60), 1500), (Date().addingTimeInterval(-14 * 24 * 60 * 60), 1500), (Date().addingTimeInterval(-15 * 24 * 60 * 60), 900), ] Chart { ForEach(salesData, id: \.0) { date, sales in LineMark( x: .value("Foo", date), y: .value("Bar", sales) ).accessibilityLabel("Foo: \(date.formatted(date: .abbreviated, time: .omitted)) Bar: \(sales.formatted(.currency(code: "USD")))") } } .accessibilityElement(children: .contain) } } I am wondering if there's a protocol, modifier.. or maybe something like UIAccessibilityContainerType.

On occasion, Swift Charts draws a large pink rectangle over the entire chart area as shown in the screen shot below. I have never been able to reproduce this issue consistently, so I do not know if it is an issue with the data I input into the chart, or an Apple bug. It happens only rarely, for one redraw cycle, then the chart returns to the correct display. Has anyone experienced this issue, and if so, what was the source of the problem and how did you resolve it?

I am plotting a SwiftUI chart from a Struct that looks like this: struct BestWeights: Identifiable { let id = UUID() let date: String let maxWeight: Int } I am then creating an array of this Struct that I will use to plot the Chart: private var bestWeights: [BestWeights] { let unformattedMonth = DateFormatter().monthSymbols[month - 1] let formattedMonth = String(unformattedMonth.prefix(3)) bestWeights.append(BestWeights(date: formattedMonth, maxWeight: bestWeightOfPeriod)) //decrementing down one month selectedDate = Calendar.current.date(byAdding: .month, value: -1, to: selectedDate) ?? selectedDate Then I am iterating through bestWeights and plotting them: Chart { ForEach(bestWeights) { bestWeight in LineMark(x: .value("Date",bestWeight.date), y: .value("MaxWeight", bestWeight.maxWeight)) .symbol { Circle() .fill(.blue) .frame(width: 7, height: 7) } } } The problem is that this produces 0 values on the Y axis that scrape the bottom of the LineMark, now I can fix this by not adding all of the bestWeights who's weight is 0 but then I don't get the full x axis I want which is 6 full months, it would show only the number of months as we have records and would jump from February to July etc.. is there any way to remove the 0 weights while keeping the X axis full of dates

I am showing weather data in a TabView where each tab will show the forecast for that day and then an hour-by-hour Swift Charts of the temperature, chance of precipitation, and then dew point for that day. The day and a text description of that forecast correctly displays for each tab. However, the chart will only show the correct data if you perform a tap gesture on the chart. To reproduce this issue, I do the following: Tap on a day in the "Upcoming Week", preferably a day in the middle. Swipe a couple days to the left or right and use the tap gesture on one of the charts. Oddly, other data on the tab is accurate, it is really just within the SwiftChart. I did try doing a horizontal ScrollView instead but I had the same issue. I also followed the demo for SwiftCharts from WWDC. Below is code that shows the TabView: struct UpcomingDaysView: View { let forecastModel:WeatherModel @State var targetPeriod:WeatherForecastDayPeriod var body: some View { TabView(selection:$targetPeriod) { ForEach(forecastModel.dailyPeriods, id: \.self) {period in DailyViewChartDetail(forecastModel: forecastModel, periodToShow: period) .frame(alignment: .topLeading) .tag(period) } } .containerRelativeFrame([.vertical]) .tabViewStyle(.page) .indexViewStyle(.page(backgroundDisplayMode: .always)) .padding(EdgeInsets(top: 20, leading: 0, bottom: 0, trailing: 0)) } } } And here is the DailyViewChartDetail: struct DailyViewChartDetail: View { var forecastModel:WeatherModel var periodToShow:WeatherForecastDayPeriod var body: some View { VStack { Text("\(DateUtility.getLongerDay(date: DateUtility.getDate(stringDate: periodToShow.dayForecast.startTime)))") .font(.title2) Text("\(periodToShow.dayForecast.detailedForecast)") .font(.subheadline) .padding(5) HourlyViewChart(forecastModel: WeatherPeriodUtility.filterModel(forecastModel: forecastModel, targetPeriod: periodToShow)) .padding(5) Spacer() } .frame( alignment: .topLeading ) } } And then some of the more relevant code in the HourlyViewChart struct HourlyViewChart: View { var forecastModel:WeatherModel @State var range: (Date, Date)? = nil @State var rawSelectedDateTemp: Date? = nil @State var rawSelectedDatePrecipitation: Date? = nil @State var rawSelectedDewPoint: Date? = nil // ... more code Below is an image that shows the issue:

Confused as to why the Chart flips with each user input. The console is also output unique id for each slice which was not my intention. Not sure if the unique .id is the culprit behind the flip. selectedCount changed to: Optional(3) Selected slice: Optional(App.EmojiUsage(id: 69090646-0D0A-4FE8-86EC-4103608DC3F7, emojiTab: App.emojiTab.sad, count: 1)) Scheduling reset task to run in 2 seconds Resetting selected slice and count selectedCount changed to: Optional(1) Selected slice: Optional(App.EmojiUsage(id: DE4A76D1-CC57-4FA0-A261-9AD1A6E28F95, emojiTab: App.emojiTab.happy, count: 2)) Scheduling reset task to run in 2 seconds Resetting selected slice and count selectedCount changed to: Optional(3) Selected slice: Optional(App.EmojiUsage(id: 5052F8EA-2582-4E72-A61D-01FCCDF3DB03, emojiTab: App.emojiTab.sad, count: 1)) Scheduling reset task to run in 2 seconds Resetting selected slice and count selectedCount changed to: Optional(0) Selected slice: Optional(App.EmojiUsage(id: 5C1AB577-6CFC-4BA8-A9DF-30822EF79B91, emojiTab: App.emojiTab.happy, count: 2)) Scheduling reset task to run in 2 seconds @Model class AppModel { var id: String var journalEntry: String var date: Date var emojiTab: emojiTab init(journalEntry: String, date: Date, emojiTab: emojiTab) { self.id = UUID().uuidString self.journalEntry = journalEntry self.date = date self.emojiTab = emojiTab } } struct EmojiPrompt: Identifiable { var id = UUID() var icon: RiveViewModel var emojitab: emojiTab var title: String } enum emojiTab: String, Codable, Plottable { case happy case sad case sleep var primitivePlottable: Double { switch self { case .sleep: return 0.0 case .happy: return 1.0 case .sad: return 2.0 } } } var emojiPrompt = [ EmojiPrompt( icon: RiveViewModel( fileName: "app", stateMachineName: "happyBtnSM", artboardName: "happyBtn" ), emojitab: .happy, title: "Happy 1" ), EmojiPrompt( icon: RiveViewModel( fileName: "app", stateMachineName: "sadBtnSM", artboardName: "sadBtn" ), emojitab: .sad, title: "Sad 2" ), EmojiPrompt( icon: RiveViewModel( fileName: "app", stateMachineName: "happyBtnSM", artboardName: "happyBtn" ), emojitab: .sleep, title: "Sleep" ) ] import SwiftUI import SwiftData import RiveRuntime import Charts struct SectorChartView: View { @Environment(\.modelContext) private var context: ModelContext @Binding var selectedEmojiUsage: EmojiUsage? @State private var selectedCount: Int? @Binding var selectedSlice: EmojiUsage? @State private var resetTask: DispatchWorkItem? // State variable for the reset task var emojiUsageData: [EmojiUsage] var resetDelay: TimeInterval = 2.0 // Adjustable delay for reset var body: some View { ZStack { Chart { ForEach(emojiUsageData) { data in SectorMark( angle: .value("Count", data.count), innerRadius: .ratio(0.70), outerRadius: selectedSlice?.emojiTab == data.emojiTab ? .ratio(1.0) : .ratio(0.75), angularInset: 1.5 ) .cornerRadius(4) .foregroundStyle(by: .value("Emoji", data.emojiTab.rawValue.capitalized)) } } .chartAngleSelection(value: $selectedCount) .chartBackground { chartProxy in GeometryReader { geo in let frame = geo[chartProxy.plotFrame!] VStack { if let selectedEmojiUsage = selectedEmojiUsage { RiveViewModel(fileName: "app", stateMachineName: "\(selectedEmojiUsage.emojiTab.rawValue)BtnSM", artboardName: "\(selectedEmojiUsage.emojiTab.rawValue)Btn") .view() .frame(width: 120, height: 120) .id(selectedEmojiUsage.emojiTab.rawValue) // Force re-render when the emojiTab changes } else { RiveViewModel(fileName: "app", stateMachineName: "sleepBtnSM", artboardName: "sleepBtn") .view() .frame(width: 120, height: 120) .id("sleep") // Force re-render when default state } } .position(x: frame.midX, y: frame.midY) } } } .onChange(of: selectedCount) { oldValue, newValue in // Ensure reset task is only scheduled if there is a valid new value guard newValue != nil else { return } resetTask?.cancel() // Cancel any existing reset task print("selectedCount changed to: \(String(describing: newValue))") if let newValue = newValue { withAnimation { getSelectedSlice(value: newValue) } let task = DispatchWorkItem { withAnimation(.easeIn) { print("Resetting selected slice and count") self.selectedSlice = nil self.selectedCount = nil self.selectedEmojiUsage = nil } } resetTask = task print("Scheduling reset task to run in 2 seconds") DispatchQueue.main.asyncAfter(deadline: .now() + resetDelay, execute: task) // Schedule reset after specified delay } } .frame(width: 250, height: 250) } private func getSelectedSlice(value: Int) { var cumulativeTotal = 0 _ = emojiUsageData.first { emojiRange in cumulativeTotal += emojiRange.count if value <= cumulativeTotal { selectedSlice = emojiRange selectedEmojiUsage = emojiRange print("Selected slice: \(String(describing: selectedSlice))") return true } return false } } } var emojiUsageData: [EmojiUsage] { let groupedEntries = Dictionary(grouping: entries, by: { $0.emojiTab }) return groupedEntries.map { (key, value) in EmojiUsage(emojiTab: key, count: value.count) } } struct EmojiUsage: Identifiable { var id = UUID() var emojiTab: emojiTab var count: Int }

(I'm using macOS 14.5 and Xcode 15.4) I have a Swift Chart on macOS that needs to scroll horizontally. Simplified version: Chart(dataPoints) { data in LineMark(x: .value("X Axis", data.x), y: .value("Y Axis", data.y)) } .chartScrollableAxes(.horizontal) .chartXVisibleDomain(length: 10) The above code works fine, except that it does not show scroll bars. On a Mac with no trackpad, this means there's no mechanism to scroll the chart. On my MacBook Pro with a trackpad, I can scroll the chart with a 2-finger swipe gesture, but there are no transient scroll bars to show the relative size of the visible part of the chart. How do I add visible scroll bars to the chart so that I can scroll on Macs with no trackpad?

Is there any approach or sample code available to use these APIs: .chartScrollableAxes(.horizontal) .chartScrollPosition(x: ...) .chartScrollPosition(initialX: ...) .chartScrollTargetBehavior(...) .chartXVisibleDomain(length: ...) Plus a gesture recognised or Pinch or Magnification to create a Swift Chart with an X axis that can be zoomed in or out with a pinch gesture? And when zoomed in at any level above 0, the chart can then be scrolled left to right along the X axis. I've had success using .chartScrollableAxes with .chartXSelection in parallel, so would also like to keep the ability to select X values too.

Hi, I'm currently wrestling with the .chartXScale(domain:) modifier in order to get my Chart to display correctly. The basics of the Chart look like this. Chart(measurements, id: \.timestamp) { measurement in if let total = measurement.production?.total { BarMark( x: .value( "Timestamp", measurement.timestamp, unit: .weekOfYear, calendar: .current ), y: .value( "Solar production", total ) ) } } As anyone familiar with Charts can see, I sort data into columns based on what week of the year the measurements belong to. Some of them can be null, and when they are, I still want space in the Chart where a BarMark would've been to be taken up, like week number 4 in this example chart (in which I've defaulted all measurements that are null in week 4 to 0, for demonstration purposes): To achieve that, as I understand, I'm meant to use the .chartXScale(domain:) modifier, but when I apply the following modifier... .chartXScale(domain: firstDayOfMonth...firstDayOfNextMonth) ... (where the domain is from the first day of the month to the first day of the next month), to the code above, I end up with this weird half step when the last week of measurements are all null: For reference, here's how the domain dates are set in my minimum reproducible example: firstDayOfMonth = Calendar.current.date(from: Calendar.current.dateComponents([.year, .month], from: .now))! firstDayOfNextMonth = Calendar.current.date(byAdding: .month, value: 1, to: firstDayOfMonth)! Am I misusing this modifier somehow, or is this a bug? Would love some help figuring this out, thanks!

I have a SwiftUI page that I want to simplify by showing basic information by default, and putting the additional info behind a "Details" DisclosureGroup for advanced users. I started by laying out all the components and breaking things into individual Views. These all are laid out and look fine. Then I took several of them and added them inside a DisclosureGroupView. But all of a sudden, the views inside started getting crunched together and the contents of the DisclosureGroup got clipped about 2/3 of the way down the page. The problem I'm trying to solve is how to show everything inside the DIsclosureGroup. The top-level View looks like this: VStack { FirstItemView() SecondView() DetailView() // <- Shows disclosure arrow } Where DetailView is: struct DetailView: View { @State var isExpanded = true var body: some View { GeometryReader { geometry in DisclosureGroup("Details", isExpanded: $isExpanded) { ThirdRowView() Spacer() FourthRowView() VStack { FifthRowWithChartView() CaptionLabelView(label: "Third", iconName: "chart.bar.xaxis") } } } } } The FifthRowWithChartView is half-clipped. One thing that might contribute is that there is a Chart view at the bottom of this page. I've tried setting the width and height of the DisclosureGroup based on the height returned by the GeometryReader, but that didn't do anything. This is all on iOS 17.6, testing on an iPhone 15ProMax. Any tips or tricks are most appreciated.

Using Charts in SwiftUI to create a horizontal bar chart, if the text of the legend is sufficiently long, the text overflows outside of the view rather than wrapping or moving to the next line. (can see problem when running code on on iPhone) Is this a bug or am I doing something incorrectly? I can use .clipped() to ensure the legend doesn't overflow. But that doesn't fully solve the problem because the text is then just cut off. import Charts import SwiftUI struct ChartData: Identifiable { let id: Int let title: String let count: Double let color: Color } struct ContentView: View { private let data = [ ChartData(id: 1, title: "Item 1", count: 4, color: .yellow), ChartData(id: 2, title: "Item 2 With a Long Title and then some more", count: 6, color: .blue), ChartData(id: 3, title: "Item 3 With a Long Title", count: 12, color: .green) ] private let chartHeight: CGFloat = 40 private let chartCornerRadius: CGFloat = 5 var body: some View { VStack { Chart(data) { item in BarMark( x: .value("Count", item.count), stacking: .normalized ) .foregroundStyle(by: .value("Title", item.title)) } .chartXAxis(.hidden) .chartYAxis(.hidden) .chartLegend(.visible) .chartPlotStyle { chartContent in chartContent .frame(height: chartHeight) } .chartForegroundStyleScale(range: data.map { $0.color }) } .padding() } } #Preview { ContentView() }