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  • Check Null data parameter in json array or dictionary object in iPhone

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    If some parameter is missing in json or dictionary. For example-

    json = (
     {
                "created_time" = "2013-11-18T14:40:37+0000";
                from =                 {
                    id = 15400100;
                    name = "Alexandra";
                };
                id = "430737890381371_26";
                message = "adding Emily...can we dress up as politically incorrect native americans and pilgrims for this? ";
            },
                        {
                "created_time" = "2013-11-18T18:39:49+0000";
                from =                 {
                    id = 793231520;
                    name = "Danielle";
                };
                id = "430737890381371_27";
            },
                        {
                "created_time" = "2013-11-18T20:47:47+0000";
                from =                 {
                    id = 100000375798578;
                    name = "Kutney";
                };
                id = "430737890381371_29";
                message = "Sounds super. Wish I was in town.";
            },
    

    )

    In the above example the message param is missing. To resolve or identify this, we should put a condition. Please see the solution below..

    Solution is :-

    NSString *text = [NSString stringWithFormat:@"%@",[[json valueForKey:@"message"] objectAtIndex:i]];
                    if ([text isEqualToString:@"<null>"] || text.length<=0) {
                       // Do your code here.....
                    }
    

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