iOS FileUtils::fullPathForDirectory return empty

[Chuanqi927]

• cocos2d-x version: 3.17.2
• devices test on: iPhone XR (iOS 14.6)
• developing environments
  • NDK version: NA
  • Xcode version: 13.2.1
  • VS version: NA
  • browser type and version: NA

Steps to Reproduce:

1. create new folders under Resource folder and put some resource files inside it.
2. use cocos2d::FileUtils::getInstance()->listFiles(dirname); to get files inside a directory.

[stevetranby]

If you haven't found a solution yet, you probably need to check that the fonts folder is in the iOS target's project's settings: BuildPhases > Copy Bundle Resources. You could also select the fonts folder in the project navigator and then "View > Inspectors > Show Inspector" (or use key combo: CMD+OPT+0) to confirm that both iOS and Mac targets are selected for the folder's membership.