Removing SfChart from SuperView

[Guillaume L'Heureux]

What's the procedure for properly removing a SfChart from superview.

Let said that I have the following chart:

_Chart = new SFChart ();


SFNumericalAxis primaryAxis = new SFNumericalAxis ();


_Chart.PrimaryAxis = primaryAxis;


primaryAxis.Interval = new NSNumber (25);


SFNumericalAxis secondaryAxis = new SFNumericalAxis ();


_Chart.SecondaryAxis = secondaryAxis;


secondaryAxis.Minimum = new NSNumber (2);


secondaryAxis.Maximum = new NSNumber (5);


secondaryAxis.Interval = new NSNumber (0.5);


ChartAreaDataSource dataModel = new ChartAreaDataSource ();
 //from the sample app

_Chart.DataSource = dataModel as SFChartDataSource;

If I try to remove the graph form the superview the app instantly crash with a SIGSEGV error.

Alternatively, if I comment the datasource lines (defeating the purpose of the chart) I can remove it from the super view without causing it to crash the application.

If I try to override the RemoveFromSuperview function in my view and set the datasource to null I got a null reference exception.

public override void RemoveFromSuperview () {

_Chart.DataSource = null; // throw null reference exception

base.RemoveFromSuperview ();

}

Thanks for your input

[Manivannan Elangovan]

Hi Guillaume,

Thanks for contacting Syncfusion support.

We can remove SfChart from its SuperView by calling its RemoveFromSuperView() method and it is not necessary to override this method.

We have prepared a sample and it can be downloaded from the following location.

Sample: http://www.syncfusion.com/downloads/support/forum/123316/ze/ChartSample-951298044

Regards,
Manivannan E.

[Guillaume L'Heureux]

Thanks,

The sample work as advertised. 

After further analysis of it appear that it was a threading issue. 

The remove from super view wasn't called from the ui thread. 

[Manivannan Elangovan]

Hi Guillaume,

Thanks for the update. Please let us know if you have any other queries.

Regards,
Manivannan E.