如何从货币代码获取NSLocale？

Question

我在尝试这个:

NSDictionary *components = [NSDictionary dictionaryWithObject:@"USD" forKey:NSLocaleCurrencyCode];
NSString *localeIdentifier = [NSLocale localeIdentifierFromComponents:components];
NSLocale *localeForDefaultCurrency = [[NSLocale alloc] initWithLocaleIdentifier:localeIdentifier];

它创建NSLocale对象,但它不包含任何区域信息.例如,

[localeForDefaultCurrency objectForKey:NSLocaleCountryCode];

返回零;

知道如何从货币代码中获取NSLocale吗？

Answer 1

由一些客人在pastebin发布:

NSDictionary *components = [NSDictionary dictionaryWithObject:@"USD" forKey:NSLocaleCurrencyCode];
NSString *localeIdentifier = [NSLocale localeIdentifierFromComponents:components];
NSLocale *localeForDefaultCurrency = [[NSLocale alloc] initWithLocaleIdentifier:localeIdentifier];

[localeForDefaultCurrency objectForKey:NSLocaleCountryCode];

Answer 2

有一些技巧,如创建具有id的区域设置,而不是正常的区域设置ID,如"en_US"传递货币代码"USD","EUR"等,它似乎适用于eur和usd我可以检查它但这个是的错误方式恕我直言.

我知道的唯一正确方法是获取所有区域设置,然后循环检查其货币代码以与您拥有的货币代码进行比较.这样,当您找到代码时,您将停止循环.

- (NSLocale *) findLocaleByCurrencyCode:(NSString *)_currencyCode
{
        NSArray *locales = [NSLocale availableLocaleIdentifiers];
        NSLocale *locale = nil;
        NSString *localeId;

        for (localeId in locales) {
                locale = [[[NSLocale alloc] initWithLocaleIdentifier:localeId] autorelease];
                NSString *code = [locale objectForKey:NSLocaleCurrencyCode];
                if ([code isEqualToString:_currencyCode])
                        break;
                else
                        locale = nil;
        }

        /* For some codes that locale cannot be found, init it different way. */
        if (locale == nil) {
                NSDictionary *components = [NSDictionary dictionaryWithObject:_currencyCode
                                                                       forKey:NSLocaleCurrencyCode];

                localeId = [NSLocale localeIdentifierFromComponents:components];
                locale = [[NSLocale alloc] initWithLocaleIdentifier:localeId];
        }
        return locale;
}

Answer 3

    NSDictionary *localeInfo = @{NSLocaleCurrencyCode: currencyCode, NSLocaleLanguageCode: [[NSLocale preferredLanguages] objectAtIndex:0]};

    NSLocale *locale = [[NSLocale alloc] initWithLocaleIdentifier:
                        [NSLocale localeIdentifierFromComponents:localeInfo]];