Get states of a country when a country is selected

Question

I have a code where it shows all countries and we can select a specific country from it. What i want now is when i select a country i want to see the list of states in that country. Can any one please help me in that ? Is there a method or API for it? Any help is appreciated. thanks

Answer 1

使用db用于获取countries and its states.只需下载它.

现在使用这个db来查询如下:

NSString *queryString = [NSString stringWithFormat:@"select zone_id , name from
                   zone where country_id = %d", countryID]; //here countryID is country code

编辑:获取所有国家/地区的查询,如下所示:

NSString *queryStrAllCountries = [NSString stringWithFormat:@"select name from
                   countries"]; 

从使用以下查询选择的国家/地区获取countryID:

 NSString *queryStrCountry = [NSString stringWithFormat:@"select country_id from
                   countries where name='%@'", countryName]; //provide country name selected

请参阅此答案,该答案提供相同的信息.