在iOS中从邮政编码自动填充城市和州 [英] Autofill city and state from zip code in iOS

问题描述

在我看来，我有三个文本框。
1.邮编，2.城市和3.州。

如何在iOS中自动填充城市和州字段？

   - （BOOL）textField：（UITextField *）textField shouldChangeCharactersInRange：（NSRange）range replacementString：（NSString *）string 
 {
 NSString * currentString = [textField.text stringByReplacingCharactersInRange：range withString：string]; 
 int length = [currentString length]; 
 if（length> 5）
 {
 return NO; 
} 
 if（length == 5）
 {
 [self getCityAndState]; 
} 
返回YES; 
} 
 
  - （void）getCityAndState 
 {
 //如何使用google（或任何）api自动填充city和state在objective  -  c中？ 
 
  

解决方案使用 Google GeoCoding API 来提取信息，如果您想发送邮政编码以接收其他信息，请使用以下命令：

  NSString * strRequestParams = [NSString stringWithFormat：@http://maps.googleapis.com/maps/api/geocode/json?address=&components=postal_code:%@&sensor=false，邮政编码]; 
 
 strRequestParams = [strRequestParams stringByAddingPercentEscapesUsingEncoding：NSStringEncodingConversionExternalRepresentation]; 
 
 NSURL * url = [NSURL URLWithString：strRequestParams]; 
 NSMutableURLRequest * request = [NSMutableURLRequest requestWithURL：url]; 
 
 [request setHTTPMethod：@GET]; 
 
 NSError *错误; 
 NSURLResponse *响应; 
 NSData * responseData = [NSURLConnection sendSynchronousRequest：request returningResponse：& response error：& error]; 
 if（！response）{
 //Connection Error，Failed to Connect to Internet
} 
 
 NSString * respString = [[NSString alloc ] initWithData：responseData encoding：NSUTF8StringEncoding]; 
 // NSLog（@RECEIVED DATA：％@，respString）; 
  

如果您的zipcode变量为32000，您将获得这个 JSON结果：

您可以解析此json以提取您想要的任何信息，包括国家，城市，经度，纬度等。

I have three textfields in my view. 1. Zip code, 2. City and 3. State.

How to autofill city and state field from the zip code in iOS?

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string
{
    NSString *currentString = [textField.text stringByReplacingCharactersInRange:range withString:string];
    int length = [currentString length];
    if(length > 5)
    {
        return NO;
    }
    if(length == 5)
    {
        [self getCityAndState];
    }
    return YES;
}

- (void) getCityAndState
{
    //How to use google (or any) api to autofill city and state in objective - c?
}

解决方案

Use the Google GeoCoding API to extract Information, if you want to send zip code to receive other information, use this:

NSString *strRequestParams = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/geocode/json?address=&components=postal_code:%@&sensor=false",zipCode];

strRequestParams = [strRequestParams stringByAddingPercentEscapesUsingEncoding:NSStringEncodingConversionExternalRepresentation];

NSURL *url = [NSURL URLWithString:strRequestParams];
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url];

[request setHTTPMethod:@"GET"];

NSError *error;
NSURLResponse *response;
NSData *responseData = [NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];
if (!response) {
    // "Connection Error", "Failed to Connect to the Internet"
}

NSString *respString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding] ;
//NSLog(@"RECEIVED DATA : %@", respString);

If your zipcode variable is 32000, you will get the this JSON result:

You can parse this json to extract any information you want including Country, City, longitude, latitude etc

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