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Editorial Team
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Asked: 2026-06-10T14:45:17+00:00

I am working on an iOS json client for a php webservice and for

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I am working on an iOS json client for a php webservice and for some reason I’m having problems parsing a fairly simple json response from the server. What do I need to do?

Edit
The problem isn’t the parsing so it must be the jsonString I’m sending the webservice.

Basically I need to send this

POST values

app = mark

data = { “01,E1,AT333AT333,9053839719,2012-08-28 14:35:58,2012-08-28 14:35:58,43.154650,-79.3877390,1000,YS3DD55H812035739,1000000,3434” }

The current code is printing null for both strings.

Here’s my method that handles the call to the webservice.

- (IBAction)submitMessage
{
    NSString* apps =@"mark";
    NSString* data = @"01,E1,AT333AT333,9053839719,2012-08-28 14:35:58,2012-08-28 14:35:58,43.154650,-79.3877390,1000,YS3DD55H812035739,1000000,3434";
    NSDictionary* jsonDictionary=[NSDictionary dictionaryWithObject: data forKey:@"data"];
    NSString* jsonString = [jsonDictionary JSONRepresentation];
    self.outPut.text=jsonString;
    NSLog(@"Made it");
    NSURL *url = [NSURL URLWithString:@"http://secure.g4apps.com/g4webservices.php"];
    AFHTTPClient *httpClient=[[AFHTTPClient alloc] initWithBaseURL:url];
    NSDictionary *params =[NSDictionary dictionaryWithObjectsAndKeys:
                           apps,@"app",
                           jsonString,@"smpdata",nil];

    NSMutableURLRequest *request = [httpClient requestWithMethod:@"POST" path:@"g4webservices.php" parameters:params];

    AFJSONRequestOperation *operation = [AFJSONRequestOperation JSONRequestOperationWithRequest:request
        success:^(NSURLRequest *request, NSHTTPURLResponse *response, id JSON) {
            NSLog(@"Response: %@ %@", [JSON valueForKeyPath:@"Status"], [JSON valueForKeyPath:@"Data"]);
            self.outPut2.text = [NSString stringWithFormat:@"response: %@ %@",[JSON valueForKeyPath:@"Status"], [JSON valueForKeyPath:@"Data"]];    }
                        failure:^(NSURLRequest *request, NSHTTPURLResponse *response, NSError *error,id JSON){
                                         NSLog(@"[Error]: %@", error);
    }
];

    [operation start];


}

Here’s a sample json response.

{

"Status":"11",
"Data":["AT333AT333,43.1547986,-79.3884892",
"BT343BT343,43.1547986,-79.3884892"]

}
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1 Answer

  1. Editorial Team

    The problem was the JSON string I was sending. The service was not using key value pairs for the json string it was receiving and I was unable to figure out how to reproduce that in Objective-C.

    Post Variable where as follows
    app=”app_name”
    data={ “Some csv data” }

    What I was able to get Objective C to produce was
    app=”app_name”
    data={ “Data”:{“Some csv data”} }

    So I modified the server to handle what iOS produced and now everythings working. Figure out how to handle the response when the Data array has more than one value.

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