TP打好图集后，2个文件导入的Unity中，前提Unity要导入 商店中
才会自动切分图集里面的图
https://www.codeandweb.com/texturepacker/tutorials/using-spritesheets-with-unity
https://assetstore.unity.com/packages/tools/sprite-management/texturepacker-importer-16641
原文：https://www.cnblogs.com/wayne1984/p/15009802.html