Inside the GameLayer constructor, we load the data like this:

_levels = FileUtils::getInstance()- >getValueVectorFromFile("levels.plist");

Cocos2d-x will take care of mapping FileUtils to the correct target. There is FileUtils for each platform that is supported by the framework and they all can be made to work with the .plist format. Sweet! If the data in the .plist file is an Array, you must convert it to ValueVector; if it's Dictionary, you must convert it to a ValueMap. We'll do that next when we load the data for a specific level.

Inside the loadLevel method, we load the data for the level like this:

ValueMap levelData = _levels.at(_currentLevel).asValueMap();

Here, the data in the .plist file is Dictionary, so we must convert the data into a ValueMap...