Updating pie chart when data changed about piecharts HOT 4 CLOSED

hey @karzler. im having the issue where the old labels aren't getting removed. Im using a redux like approach when updating my pie chart but for some reason, the old labels won't go away. This is what i have:

    chartView.models.removeAll()
    chartView.removeSlices()
    chartView.layers.removeAll()
    
    self.chartView.models = state.pieSlices


    chartView.layers = [createTextLayer()] <- this function creates new labels with updated values

how'd you remove the old labels?

I'd appreciate the help here

from piecharts.

Apparently, it was a tiny mistake on my side. I was recreating text layers multiple times.

For folks looking out how to update the chart, simple set models to empty, and then create models again. Make sure you remove the slices before creating the new models

from piecharts.

Hey @zas9vf, I struggled a bit to remove the old labels. In my case I used

self.chartView.removeSlices()
self.chartView.layers.removeAll()
self.chartView.models.removeAll()

and initialized text layer as a global variable in the page

var textLayer = PiePlainTextLayer()

Each time i needed to update the chart i used this code:

self.textLayer.clear()

Then update the layers using the method that exists in the tutorial

 let textLayerSettings = PiePlainTextLayerSettings()
 textLayerSettings.viewRadius = 100
 textLayerSettings.hideOnOverflow = false
 textLayerSettings.label.textColor = UIColor.white
 textLayerSettings.label.font = UIFont.systemFont(ofSize: 15)
                                
 let formatter = NumberFormatter()
 formatter.maximumFractionDigits = 1
 textLayerSettings.label.textGenerator = {slice in
    return formatter.string(from: slice.data.percentage * 100 as NSNumber).map{_ 
    }
}
self.textLayer.settings = textLayerSettings
self.chartView.layers = [self.textLayer]

I hope this helps.

from piecharts.

I had to do some edits to the source code itself to get what I wanted but appreciate the help! 👍🏽

from piecharts.