I am closing this thread as duplicate to the following one http://www.telerik.com/forums/nativescript-ui-pro-chart-e3270ce9be96
Please, follow your initial request in the link above, where a solution to your issue can be found.
p.p. The cause of your issue is the pointSelected index
value under iOS and not the dialog module. Once again please refer to the original thread for additional details on that matter.
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