objective-c - 本地化串联或动态字符串

Question

我熟悉使用 NSLocalizedString() 来本地化字符串，但我今天遇到的问题需要更多的技巧。我的情况是这样的:

NSString *userName; //the users name, entered by the user.  Does not need localized
NSString *favoriteFood; //the users favorite food, also entered by user, and not needing localized

NSString *summary = [NSString stringWithFormat:@"%@'s favorite food is %@", userName, favoriteFood];

这适用于英语，但并非每种语言都使用与英语相同的词序，例如，将同一句子从日语逐字翻译成英语会是:

UserName's favorite food pizza is

更不用说 's is 并不是所有语言中的所有格。

有哪些技术可用于本地化此类连接句？

为了他人的利益而更新: @Jon Reed 是对的，位置说明符对于本地化非常重要。他链接的文档仅包含对它们可以与 NSString、NSLog 等一起使用这一事实的引用，该链接并没有真正说明如何使用它们。

我找到了 this link ，这很好解释。它也比我更好地解释了我的问题。来自链接:

Format strings for printf and sprintf (see Printf) present a special problem for translation. Consider the following:1

 printf(_"String `%s' has %d characters\n",
           string, length(string))) A possible German

translation for this might be:

 "%d Zeichen lang ist die Zeichenkette `%s'\n" The problem

should be obvious: the order of the format specifications is different from the original! Even though gettext can return the translated string at runtime, it cannot change the argument order in the call to printf.

To solve this problem, printf format specifiers may have an additional optional element, which we call a positional specifier. For example:

 "%2$d Zeichen lang ist die Zeichenkette `%1$s'\n" Here, the

positional specifier consists of an integer count, which indicates which argument to use, and a ‘$’. Counts are one-based, and the format string itself is not included. Thus, in the following example, ‘string’ is the first argument and ‘length(string)’ is the second:

 $ gawk 'BEGIN {
 >     string = "Dont Panic"
 >     printf _"%2$d characters live in \"%1$s\"\n",
 >                         string, length(string)
 > }'
 -| 10 characters live in "Dont Panic"

Answer 1

要指定替换顺序，请使用 %1$@ 和 %2$@ 作为您的格式说明符。本地化格式字符串可以按任何顺序使用它们。例如，假设您的字符串键是“FavoriteFood”。调用

NSString *summary =
            [NSString stringWithFormat:NSLocalizedString(@"FavoriteFood", nil), 
                                       userName, favoriteFood];

本地化将格式说明符放在对其语言环境有意义的地方。示例:

"FavoriteFood" = "%2$@ is the favorite food of %1$@";

参见 String Format Specifiers