whats different between s:FormItem and mx:FormItem in flex4

Question

当我在flex中使用Form和FormItem时，我发现s：FormItem无法自动放置其标签位置，并且不能使用direction，horizentalGap属性，但是adobe建议我们使用spark.components.FormItem代替mx。 FormItem，那么您能告诉我这两个类的不同之处，并告诉我为什么spark.components.FormItem.Thanks中不能使用诸如方向，horizentalGap之类的属性。

Answer 1

Well, the mx FormItem is "legacy" code and was built using the MX / Halo component architecture .

The Spark FormItem was built using the new Spark component architecture . The Flex Framework Components built in each respective architecture are not identical.

If you want to specify a "Direction" in the Spark FormItem you could try setting it's layout property to either a horizontal or vertical layout .