Checking a null value in Objective-C that has been returned from a JSON string

Question

I have a JSON object that is coming from a webserver.

The log is something like this:

{          
   \"status\":\"success\",
   \"Us         


        

Answer 1

I usually do it like this:

Assuma I have a data model for the user, and it has an NSString property called email, fetched from a JSON dict. If the email field is used inside the application, converting it to empty string prevents possible crashes:

- (id)initWithJSONDictionary:(NSDictionary *)dictionary{

    //Initializer, other properties etc...

    id usersmail = [[dictionary objectForKey:@"email"] copy];
    _email = ( usersmail && usersmail != (id)[NSNull null] )? [usersmail copy] : [[NSString      alloc]initWithString:@""];
}