How to show/hide one of the line chart during runtime

[nonameplum]

Hi,

I have UISwitches in the UI that allow a user show/hide (3) lines of the linechart.
At the beginning I want to show only one line chart when viewDidLoad. But the problem is that hiding during viewDidLoad is not working. When view is loaded and user is changing visibility of the lines using switches then it works.

func showLine(label: String, visible: String) {
    lineChartView.data?.getDataSetByLabel(label, ignorecase: false)?.visible = visible
    lineChartView.setNeedsDisplay()
}

When I move code from the viewDidLoad to the viewDidAppear then it also works but there is visual side effect that user sees that line are hiding which I would like to avoid.

I found that there is also another way using ugly hack. When I wrap body of the showLine method to the dispatch_after with e.g. 0.2 sec.

Is there a way to resolve this problem?

[liuxuan30]

are you hiding specific lines or line chart views, I am confused.

[nonameplum]

Exactly. I want to hide only specific lines

[liuxuan30]

Either add/remove the specific line chart data sets or leverage

    /// Set the visibility of this DataSet. If not visible, the DataSet will not be drawn to the chart upon refreshing it.
    var visible: Bool { get set }