Calculate the file size in a folder in iOS

Typically used to delete a cache, calculate the cache size//size of a single file-(Long Long) Filesizeatpath: (nsstring*) filepath{    nsfilemanager* manager = [ Nsfilemanager Defaultmanager];    if ([manager Fileexistsatpath:filepath]) {        return [[Manager Attributesofitematpath:filepath Error:nil] fileSize];    }    return 0;} Traverse folder to get the folder size, return how many m (float) Foldersizeatpath: (nsstring*) folderpath{    nsfilemanager* manager = [Nsfilemanager Defaultmanager];    if (![ Manager Fileexistsatpath:folderpath]) return 0;    Nsenumerator *childfilesenumerator = [[manager Subpathsatpath:folderpath] objectenumerator];    nsstring* FileName;    Long long foldersize = 0;    while ((FileName = [Childfilesenumerator nextobject]) = nil) {        nsstring* fileabsolutepath = [FolderPath Stringbyappendingpathcomponent:filename];        Foldersize + = [self Filesizeatpath:fileabsolutepath];    }    Return foldersize/(1024.0*1024.0);}

Calculate the file size in a folder in iOS