Question

I have a Localizable.strings file for my project’s i18n, and a lib uses KYLocalizable.strings.

I have considered to make Localizable.strings “subclass” from KYLocalizable.strings, but it cannot as far as I know. So instead, I want to define a function macro like what SDK does:

#define NSLocalizedString(key, comment) \
    [[NSBundle mainBundle] localizedStringForKey:(key) value:@"" table:nil]
#define NSLocalizedStringFromTable(key, tbl, comment) \
    [[NSBundle mainBundle] localizedStringForKey:(key) value:@"" table:(tbl)]

Pseudo code：

#define CustomLocalizedString(key, comment) \
    // if key exists in Localizable.strings
    //   use it
    [[NSBundle mainBundle] localizedStringForKey:(key) value:@"" table:nil]
    // else
    //   search it in KYLocalizable.strings
    [[NSBundle mainBundle] localizedStringForKey:(key) value:@"" table:@"KYLocalizable"]

so I can just use CustomLocalizedString(<key>, <comment>) in my project.
But how to check whether the key exists in Localizable.strings or not?

Thanks in advance!!

Answer 1

If the key doesn’t exist, the string you will receive will be the key itself.
So as long as you suppose you will never use the key as a localized string, you can test if NSLocalizableString returned you the key or not.