Enable AALegend for triple Y axes sample chart

AAChartModel · AAChartModel · commit ffb112e8c8fe · 2019-10-14T18:57:46.000+08:00
diff --git a/AAChartKitDemo/ChartsDemo/DrawChartWithAAOptionsVC.m b/AAChartKitDemo/ChartsDemo/DrawChartWithAAOptionsVC.m
@@ -1797,6 +1797,7 @@ - (AAOptions *)configureTripleYAxesMixedChart {
     .sharedSet(true);
     
     AALegend *aaLegend = AALegend.new
+    .enabledSet(true)
     .layoutSet(AAChartLayoutTypeVertical)
     .alignSet(AAChartAlignTypeLeft)
     .xSet(@80)
