typedef NS_ENUM(NSUInteger, MyEnum1) {
    PackagesNo1 = 1,
    PackagesNo2 = 2,
    PackagesNo4 = 4,
    PackagesNo8 = 8
};

typedef NS_ENUM(NSUInteger, MyEnum2) {
    LEVEL0 = 0,
    LEVEL1 = 1,
    LEVEL2 = 2,
    LEVEL3 = 3
};

- (int)packagesNeededForLevel:(int)level {
    switch (level) {
        case LEVEL0:
            return PackagesNo8;
        case LEVEL1:
            return PackagesNo4;
        case LEVEL2:
            return PackagesNo2;
        case LEVEL3:
            return PackagesNo1;
    }
}