iphone - Xcode 中省略参数的高级本地化

Question

我有一个格式化的字符串，我正在让翻译人员处理它。

英语

"Check out the %1$@ %2$@ in %3$@: %4$@" = "Check out the %1$@ %2$@ in %3$@: %4$@"

GERMAN TRANSLATION

"Check out the %1$@ %2$@ in %3$@: %4$@" = "Hör Dir mal %2$@ in %3$@ an: %4$@";

These are passed to a [NSString stringWithFormat:] call:

//////////////////////////////////////
// Share Over Twitter
NSString *frmt = NSLocalizedString(@"Check out the %1$@ %2$@ in %3$@: %4$@", @"The default tweet for sharing sounds. Use %1$@ for where the sound type (Sound, mix, playlist) will be, %2$@ for where the audio name will be, %3$@ for the app name, and %3$@ for where the sound link will be.");
NSString *urlString = [NSString stringWithFormat:@"sounds/%@", SoundSoundID(audio)];
NSString *url = ([audio audioType] == UAAudioTypeSound ? UrlFor(urlString) : APP_SHORTLINK);
NSString *msg = [NSString stringWithFormat:
                 frmt,
                 [[Audio titleForAudioType:[audio audioType]] lowercaseString],
                 [NSString stringWithFormat:@"\"%@\"", AudioName(audio)],
                 APP_NAME, 
                 url];
returnString = msg;

期望的和实际的结果:

英语

desired: "Check out the sound "This Sound Name" in My App Name: link_to_sound"
actual:  "Check out the sound "This Sound Name" in My App Name: link_to_sound"

德语

desired: "Hör Dir mal "This Sound Name" in My App Name an: link_to_sound"
actual:  "Hör Dir mal sound in "This Sound Name" an: My App Name"

问题 问题是我假设通过在 -[NSString stringWithFormat:] 中使用编号变量，我可以做这样的事情，其中​​ %1$@变量被完全省略。如果您注意到，格式字符串的德语翻译根本不使用第一个参数 (%1$@)，但它(“声音”)仍然出现在输出字符串中。

我做错了什么？

Answer 1

这不是一个错误。编号参数不是 C 标准的一部分，而是 IEEE Std 1003.1 的一部分，其中包含以下内容(强调我的内容):

The format can contain either numbered argument conversion specifications (that is, "%n$" and "*m$"), or unnumbered argument conversion specifications (that is, % and * ), but not both. The only exception to this is that %% can be mixed with the "%n$" form. The results of mixing numbered and unnumbered argument specifications in a format string are undefined. When numbered argument specifications are used, specifying the Nth argument requires that all the leading arguments, from the first to the (N-1)th, are specified in the format string.