objective-c++ - 如何使用 FourSquare Api 获取 field 列表

Question

我想获取当前位置附近的 field 列表
我找到了一个forsquare Api的方法

+(void)searchVenuesNearByLatitude:(NSString*)lat
                longitude:(NSString*)lon
               accuracyLL:(NSString*)accuracyLL
                 altitude:(NSString*)altitude
              accuracyAlt:(NSString*)accuracyAlt
                    query:(NSString*)query
                    limit:(NSString*)limit
                   intent:(NSString*)intent
                 callback:(Foursquare2Callback)callback;

但我不知道如何使用这种方法。
任何帮助将是可观的。

Answer 1

我在研究了 Foursquare Api 文档之后。

我得到了获取附近当前位置的 field 列表的方法。不需要使用 Foursquare 图书馆的预建方法(如我在我的问题中所示。)
为此，我们需要发出一个 HTTP 请求，通过它我们得到 JSON 作为响应。
我写的代码如下。

-(void)getVenuesList{
NSDate *currDate = [NSDate date];
NSDateFormatter *dateFormatter = [[[NSDateFormatter alloc]init] autorelease];
[dateFormatter setDateFormat:@"YYYYMMdd"];
NSString *dateString = [dateFormatter stringFromDate:currDate];
//dateString it;s used for being UpTodate for API request
NSString* rediusMtr=@"2000";//distance under the comes    
NSString *acess_Token=@"OAuth_Token ";
//acess_TokenOuth Token got from Foursqaure after registarting the App.
CGFloat latitude=245425435.564;//latitude & longitude coordinate
CGFloat longitude=245443435.564;
NSString *latitudeStr=[NSString stringWithFormat:@"%f,",latitude];
NSString *longitudeStr=[NSString stringWithFormat:@"%f",longitude];
NSMutableString*latitudeLongitudeString =[[NSMutableString alloc]initWithString:latitudeStr];
[latitudeLongitudeString appendString:longitudeStr];
NSString *query=@"airport";//Venuse to be searched.
NSString *resultLimit=@"50";//number of result to be returned.

NSString *URLString=[NSString stringWithFormat:@"https://api.foursquare.com/v2/venues/search?ll=%@&query=%@&limit=%@&radius=%@&oauth_token=%@&v=%@",latitudeLongitudeString,query,resultLimit,rediusMtr,acess_Token,dateString];
URLString =[URLString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:URLString]];

//Perform request and get JSON back as a NSData object
NSError *error = nil;
NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:&error];
if(error != nil) {
     UIAlertView *alert = [[[UIAlertView alloc] initWithTitle:@"Error" message:[error localizedDescription] delegate:nil cancelButtonTitle:@"Done"otherButtonTitles:nil] autorelease]; 
    [alert show];
}
else {
    NSString *jsonString = [[[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding] autorelease];
    NSLog(@"%@",jsonString);

    SBJSON *parser = [[[SBJSON alloc] init] autorelease];
    NSDictionary *jsonResponse = (NSDictionary*)[parser objectWithString:jsonString error:nil];
    NSDictionary *responseData = [[jsonResponse objectForKey:@"response"] objectForKey:@"venues"] ;
    NSArray *resultsArray= [responseData  valueForKey:@"name"] ;
    NSArray*distanceArray=[[responseData  valueForKey:@"location"] valueForKey:@"distance"];
   //Now we can use above resultsArray,distanceArray data.

}

For more Information about foursquare API go through this link