I want to using label with attributed string with name (issue #8). So, the following tasks were carried out :

1. add 'name' property on PieSliceModel to identify as text
2. support NSAttributedString to use label better without modifying labelGenerator on PieChartLabelSettings.swift

you can create slice model as: PieSliceModel(value: 2, color: colors[2]) // previous or PieSliceModel(name: "fff", value: 2, color: colors[0]) // this time

and you can use attributedText as:

    let categoryAttr = [
        NSFontAttributeName: UIFont.systemFont(ofSize: 8, weight: UIFontWeightLight),
        NSForegroundColorAttributeName: UIColor.blue
    ]

    let percentageAttr = [
        NSFontAttributeName: UIFont.systemFont(ofSize: 8),
        NSForegroundColorAttributeName: UIColor.black
    ]

    textLayerSettings.label.type = .attributed
    textLayerSettings.label.attributedTextGenerator = {slice in
        let categoryString = NSMutableAttributedString(string: slice.data.model.name ?? "", attributes: categoryAttr)
        let percentageString = NSMutableAttributedString(string:
            formatter.string(from: slice.data.percentage * 100 as NSNumber).map{"\($0)%"} ?? "", attributes: percentageAttr)
        categoryString.append(percentageString)
        
        return categoryString
    }

without textGenerator.

Thank you!

It is not a real problem but a clarification

Hi, i'm using your library is good and can be used in many ways!

I'm using your library in my project but first i'm trying in your demo project, i'm looking to personalizate the Doughnut but for me your library is not easy, i tried to modificate something and i'm getti what i want, but not at all.

I'm gonna to personalizate the slices, where i want only two slices, 1st is the main and the 2nd will be modificate by code frequently(for that i can remove the last and create a new or i can modificate the currently slice), i want a single percentage in the middle (i have already set the text in the middle point of the doughnut but when i add slice i have a label over another).

Have you some suggestion for my question?

Thank you in advance.

I ma facing an issue while adding data to pie chart from coredata, I am inserting new data with the method insertSlice and then lineTextLayerSettings.label.textGenerator this method is called and in it i am using for loop fetch data and the pie is inserted at 0 and the text is inserted at last. Can u help in this matter?

I have updated the project to support Swift 4.2. The edits are backwards compatible to Swift 4.0 Signed-off-by: Markus Bürgler [email protected]

The value property of a model in the pie chart is a 'let' constant. So that cannot be modified. Other way i could figure out was to set models to empty and create models again, but that added two piecharts, one on top of another.

Is there a clear precise way to update the chart with changing the values of the pie chart models?

Expected Behavior: The pie chart should update the slices when the data is changed. Observed Behavior: The value property cannot be set. The updated chart shows up only when the app is started again.

How do you recommend to update the chart when the data is changed?

UPDATE:

I am now able to update the chart, but I am still unable to show just the updated values in the text layer. The older text layers also show up despite removing all of them before setting the new labels.

pieChart.models = [] pieChart.removeSlices() // now create models -> this updates the chart. However the previous text layers still show up.

Can I do something like:

func onSelected(slice: PieSlice, selected: Bool) {
    if selected {
        chartView.layers = [createCustomViewsLayer()]
    }
 }

Also also tried adding it while creating the chartView but then when I hide all layers by default (container view), I am not able to set isHidden=false in onSelected

I am trying to add a uibezierpath around the selected slice, something like this:

I wanted to remove animation for ChartView : chartView.animDuration = 0.0

Infos are not displayed anymore, you can test it by adding this line in "CustomViewsDemo".

I'm using it well but I want to change angle that start point of first pie slice.

is there a method to change angle of chart in release version (0.04) ?

Hi, our team was hoping to use PieCharts through Cocoapods, with my pull request merged in the project. The current release does not have options for using PieChart without Xibs, while our team's internal policy is to not use Xibs.

Could you do us a favor of releasing a new version of PieCharts?

Thanks!

I want to change chart radius size but i can't do it.

let viewLayer = PieViewLayer() let settings = PieViewLayerSettings() settings.viewRadius = 70 settings.hideOnOverflow = false viewLayer.settings = settings

responseChart.layers = [viewLayer, responseTextLayer]

is'nt it true?

I'm trying to add this chart to my app but I can't set the size using storyboard because it needs to auto scale with constraints. So I tried doing it programmatically but whatever I do it doesn't seem to update.

@IBOutlet weak var profileChartView: PieChart!
profileChartView.outerRadius = 40 //These are just demo values
profileChartView.innerRadius = 50

• Adds Support for SPM
• Fixes compilation warnings
• I mistakenly tagged 0.0.8 too soon, so my code jumps to v0.0.9

Not too sure, but we may need to retag the master branch after this merge for cocoapods (and SPM) to work on the main project.

var colors:[UIColor] = [ UIColor(hexString: "#F69300"), UIColor(hexString: "#93D460"), UIColor(hexString: "#5D86EF"), UIColor(hexString: "#F16051"), UIColor(hexString: "#FFFFFF")] var texts:[String] = [ "Lorem", "Ipsum", "Correct", "Wrong", "Correct"] var percentages:[CGFloat] = [15,12,18,25,30] var textLayers:[PieLineTextLayer] = [] var sliceModels:[PieSliceModel] = []

for index in stride(from: 0, to: texts.count, by: 1) {
        
        sliceModels.append(PieSliceModel(value: Double(percentages[index]), color: colors[index]))
        
        let textLayerSettings = PieLineTextLayerSettings()
        textLayerSettings.label.font = Fonts.bold(size: 17)
        textLayerSettings.label.textColor = UIColor(hexString: "#F69300")

        let formatter = NumberFormatter()
        formatter.maximumFractionDigits = 1
        
        let textToSet = "\(percentages[index])% \(texts[index])"
        
        textLayerSettings.label.labelGenerator = { slice in
            
            let lbl = UILabel(frame: CGRect.zero)
            lbl.sizeToFit()
            lbl.text = textToSet
            lbl.textColor = self.colors[index]
            lbl.font = Fonts.bold(size: 18)
            
            lbl.setfont(text: textToSet, words: [self.texts[index]], firstFont: Fonts.bold(size: 18), secondFont: Fonts.medium(size: 14), wordColor: UIColor.white)
            return lbl
        }
        
        textLayerSettings.label.textGenerator = {slice in
            return textToSet
        }

        let textLayer = PieLineTextLayer()
        textLayer.settings = textLayerSettings
        
        textLayers.append(textLayer)
        
    }
    
    pieChart.models = sliceModels
    
    pieChart.layers = textLayers

Hi Thank you for amazing lib.

I'm using the pie chart inside a collection view cell. And it doesn't seem to be at the center (horozontal center). Pie chat view is added via Interface builder.

Version: PieCharts (0.0.7)

        // Pie chart settings
        chartView.selectedOffset = 20
        chartView.outerRadius = 75
        chartView.innerRadius = 45
        
        var textLayerSettings = PieLineTextLayerSettings()
        textLayerSettings.lineColor = UIColor.white
        textLayerSettings.label.font = UIFont.systemFont(ofSize: 12, weight: .bold)
        textLayerSettings.label.textColor = UIColor.white
        
        let textLayer = PieLineTextLayer()
        textLayer.settings = textLayerSettings
        
        chartView.layers = [textLayer]
        chartView.strokeColor = UIColor(hexString: Constants.kDarkBackgroundColor)
        chartView.strokeWidth = 3
        

Attached is a screenshot.

• I ran into this crash when receiving a 0 value from the backend server and the app attmepted to draw a chart for it. This way we'll avoid the crash vy not drawing the chart if the model.value property is 0

Hello,

First of thanks for the library.

The slice labels are overlapping if the slice values are too small. Here is a sample screenshot:

Is it possible to solve this?

Best