问题
This appeared as I was trying to use a mouseEvent to move an object. I placed the variables for mouseX and mouseY in the public class. I did the same for direction X and Y but there was no error message for those.
回答1:
If the class you are adding the mouseX to is extending the DisplayObject type (and if it's any kind of Flex component than it does), you already have a variable with that name from that type. As a fix name your variable something else eg. myMouseX. If you don't know what exactly I'm taking about with extending classes, check the tutorial on Object-oriented programming in ActionScript.
来源：https://stackoverflow.com/questions/2310961/what-is-the-error-a-conflict-exists-with-inherited-definition-flash-displaydis