If i have already created the charts in a collectionview can i call it to reanimate? about piecharts HOT 4 OPEN

Well, you could just re-create the chart, this would generate the same visual effect as re-animating it, I think. Otherwise it's not supported, feel free to adjust the code!

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I am also having same problem. Every time I Draw chart, but still no difference.

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How should we recreate the chart ?
override func viewDidAppear(_ animated: Bool) {
chartView = PieChart(frame: chartView.frame)
chartView.layers = [createTextWithLinesLayer()]
chartView.delegate = self
chartView.models = createModels() // order is important - models have to be set at the end

This raises an error : "found nil while unwrapping an Optional value"

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Found a solution : in willAppear if it's not the firstTime create a second one,
if !firstTime {
chartView2 = PieChart(frame: framePieChart)
chartView2.frame = framePieChart

        chartView2.innerRadius = 0.0
        chartView2.selectedOffset = 0.0
        chartView2.animDuration = 0.0
        chartView2.outerRadius = chartView.outerRadius
        chartView2.strokeColor = UIColor.white
        chartView2.strokeWidth = 1.0
        chartView2.layers = [createTextWithLinesLayer()]
        chartView2.delegate = self
        chartView2.models = createModels() // order is important - models have to be set at the end
        chartView.isHidden = true
        contentView.addSubview(chartView2)
    }

and in override func viewWillDisappear(_ animated: Bool) {
super.viewWillDisappear(animated)
chartView2.removeFromSuperview()
}

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