1种:
var totalQuantity = this.comp("mainData").getAggregateValue("totalQuantity");
this.comp("mainData").setValue("fMouldCumulativeCastingIn",totalQuantity);
2种:
var m = justep.xbl("mainData");
var totalQuantity = m.getAggregateValue("totalQuantity");
this.comp("mainData").setValue("fMouldCumulativeCastingIn",totalQuantity);