反向地理编码仅以英文返回结果？

Question

使用下面的代码,我正在为当前坐标请求反向地理编码.
一切都很好,除了设备设置为与英语不同的语言.
示例:如果设备的语言是意大利语,而我在意大利,则国家的结果是"Italia"而不是"Italy".

无论设备的语言如何,我如何强制结果只能用英语？

CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:myCurrentLocation completionHandler:^(NSArray *placemarks, NSError *error) {

    for (CLPlacemark * placemark in placemarks) {

        [locationController setLastKnownCountry:[placemark country]];
    }
}];

谢谢.

Answer 1

您必须使用管理每种语言的信息的NSLocale类.然后,对于您的最终翻译,您必须强制使用英语语言环境:

CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
[geoCoder reverseGeocodeLocation:myCurrentLocation completionHandler:^(NSArray *placemarks, NSError *error) {

    for (CLPlacemark * placemark in placemarks) {
         //Obtains the country code, that is the same whatever language you are working with (US, ES, IT ...)
         NSString *countryCode = [placemark ISOcountryCode];
         //Obtains a locale identifier. This will handle every language
         NSString *identifier = [NSLocale localeIdentifierFromComponents: [NSDictionary dictionaryWithObject: countryCode forKey: NSLocaleCountryCode]];
         //Obtains the country name from the locale BUT IN ENGLISH (you can set it as "en_UK" also)
         NSString *country = [[[NSLocale alloc] initWithLocaleIdentifier:@"en_US"] displayNameForKey: NSLocaleIdentifier value:identifier];

        //Continues your code
        [locationController setLastKnownCountry:country];
    }
}];

Answer 2

它适用于 iOS 11 API： reverseGeocodeLocation(_:preferredLocale:completionHandler:)

可悲的是，我需要支持其他 iOS 版本，而更改 UserDefaults 对我来说既不舒服也不适合我:-(