问题
The up and down arrows on the spinner are not showing and I am unsure why. All other UI images seem to be loading besides these arrows. Here is a website
Website Link
回答1:
The reason those images don't show, is because they aren't found in the path that you are specifying. Either you have forgotten to upload them, or you've uploaded them to the wrong directory.
来源：https://stackoverflow.com/questions/24348964/jquery-spinner-arrows-not-loading-visibility