IOS ImageName method gets the folder (blue folder) inside the picture

There are two types of folders in the iOS project created by Xcode: Group (yellow, pseudo folder) and folder (blue, True folder):

Group:

Folder:

PNG images within the Images.xcassets or group folder can be loaded directly via the Imagenamed method:

[UIImage imagenamed:@ "photo"];

PNG images inside folder folders must be stitched to the folder path via the Imagenamed method, otherwise the picture cannot be displayed:

[UIImage imagenamed:@ "folder/imageName"];

IOS ImageName method gets the folder (blue folder) inside the picture