iOS JSON Parse not working (returns null dictionary)

Question

I use the NSJSONSerialization's JSONObjectWithData:data options: error: to parse JSON data returned from a server.

Now for the options parameter I use: NSJSONReadingAllowFragments. You can look below and see the actual JSON (where I believe the problem is).

The error message I get is:

Error Domain=NSCocoaErrorDomain Code=3840 "The operation couldn’t be completed. (Cocoa error 3840.)" (Invalid value around character 0.) UserInfo=0x6895da0 {NSDebugDescription=Invalid value around character 0.}

Any idea how to fix it?

JSON =

{"name":"Johan Appleseed",
"email":"[email protected]",
"phone":"[phone]",
"accounts":{
    "facebook":[true,1125],
    "twitter":[false,null],
    "homepage":[true,"http:\/\/johnAplleseed.com\/index.html"]}}

Answer 1

Probably you have some unprintable character that you cannot see. Try this:

NSData *jsonData = ...
const unsigned char *ptr = [data bytes];

for(int i=0; i<[data length]; ++i) {
  unsigned char c = *ptr++;
  NSLog(@"char=%c hex=%x", c, c);
}

To verify you don't have unprintable characters at the beginning or end of the data.

EDIT: to clarify, just run the above on your JSON dictionary - the one that fails to parse.