[solved]Qt Creator: Resource root is empty, not shown in stylesheet

Even though you added the images to the prefix.

It's not shown in stylesheet.

In this case, I chose the pushbutton's stylesheet.

and chose the background-image.

But nothing shown up.!

And refresh button is not working....

Finally, I figured out... 

you should reopen the Qt Program. 

done!

I can see the images .