Bubble Charts Choose not jump into the method “chartValueSelected...”?

[q563469]

Morning!
thanks very much to receive this issue.
Bubble Charts Choose not jump into the method “chartValueSelected...”。is that the Bubble Charts has not set this delegate method？

#pragma mark - ChartViewDelegate

• (void)chartValueSelected:(ChartViewBase * __nonnull)chartView entry:(ChartDataEntry * __nonnull)entry highlight:(ChartHighlight * __nonnull)highlight
  {
  NSLog(@"chartValueSelected");
  }
  How can I use this method in Bubble Charts？

[liuxuan30]

ask on stack overflow. and play with charts demo.