Parsing JSON returns NULL iOS

Question

I'm trying to parse the JSON string:

array(3) {
  ["result"]=>
  string(7) "success"
  ["source"]=>
  string(12) "setWorldTime"
  ["success"]=>
  bool(true)
}

With this code:

SBJsonParser *parser = [[SBJsonParser alloc] init];

    // Prepare URL request to download statuses from Twitter
    NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:@"http://localhost/con.php?m=setWorldTime&a=London,0"]];

    // Perform request and get JSON back as a NSData object
    NSData *response = [NSURLConnection sendSynchronousRequest:request returningResponse:nil error:nil];

    // Get JSON as a NSString from NSData response
    NSString *json_string = [[NSString alloc] initWithData:response encoding:NSUTF8StringEncoding];
    NSLog(json_string);
    // parse the JSON response into an object
    // Here we're using NSArray since we're parsing an array of JSON status objects
    NSDictionary *statuses = [parser objectWithString:json_string error:nil];
    NSLog(@"OK: %@", [[statuses objectForKey:@"array"] objectForKey:@"result"]);

But instead of output 'OK: success' it outputs 'OK: (null)' If you need the PHP script I can post it.

Brad · Accepted Answer · 2012-07-31 16:27:46Z

2

That string you have is anything but JSON... looks like var_dump() or something from PHP. That's why it can't be parsed.

You need to use json_encode() on your PHP end instead.

answered Jul 31, 2012 at 16:27

Brad

164k57 gold badges380 silver badges559 bronze badges

Sign up to request clarification or add additional context in comments.

7 Comments

Brad Over a year ago

@TheDeveloper, I doubt any API outputs that intentionally. Looks like someone's debugging code to me.

Brad Over a year ago

@TheDeveloper, Is this your PHP script serving the data? If so, yes, rather than var_dump(), use json_encode(). If this is someone else's, tell them to output in some standard data format. I suppose you could write a parser for var_dump()'s output, but why would you want to?

RaphMclee Over a year ago

Why are you not using an Json lib for iOS?

Allison Over a year ago

So after using json_encode it outputs as string(59) "{"result":"success","source":"setWorldTime","success":true}"

Brad Over a year ago

@TheDeveloper, Stop using var_dump() and just output the string. If that string is in your log on the iOS side, then yes, you are now doing it correctly.

|

Collectives™ on Stack Overflow

Parsing JSON returns NULL iOS

1 Answer 1

7 Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

7 Comments

Your Answer

Sign up or log in

Post as a guest

Related