iOS SBJson request goes bad - ios

Question

I'm trying to parse a JSON feed from my wordpress blog. I've got a custom field I need to use but can't get it to work with SBJson. Here's how my feed looks like (I've stripped the other useless stuff):
{
"status":"ok",
"count":27,
"count_total":2552,
"pages":95,
"posts":[
{
"id":8978,
"type":"post",
"custom_fields":{
"btnNameScrollBlog":[
"<null>"
]
"author-name":[
"John Doe"
]
},
}
I'm trying to get the author's name.
Here's the code I used for getting the feed on iOS:
-(void)downloadRecentPostJson{
[recentPost removeAllObjects];
[previous_total_per_page removeAllObjects];
NSURL *urls = [NSURL URLWithString:[NSString stringWithFormat:#"%#/?json=%#",url,methodJson]];
NSData *sa = [NSData dataWithContentsOfURL:urls];
NSString *jsonString = [[NSString alloc] initWithData:sa encoding:NSUTF8StringEncoding];
NSDictionary *result = [jsonString JSONValue];
NSArray* posts = [result objectForKey:#"posts"];
total_page = [[result objectForKey:#"pages"] intValue];
total_post_per_page = [[result objectForKey:#"count"] intValue];
[previous_total_per_page addObject:[result objectForKey:#"count"]];
current_page = 1;
for (NSDictionary *post in posts) {
id custom = [post objectForKey:#"custom_fields"];
id thumbnail = [post objectForKey:#"thumbnail"];
NSString *featuredImage = #"";
if (thumbnail != [NSNull null])
{
featuredImage = (NSString *)thumbnail;
}
else
{
featuredImage = #"0";
}
[recentPost addObject:[NSArray arrayWithObjects:[post objectForKey:#"id"],[post objectForKey:#"title_plain"],[post objectForKey:#"excerpt"],featuredImage,[post objectForKey:#"content"],[post objectForKey:#"date"],[post objectForKey:#"comments"],[post objectForKey:#"comment_status"],[post objectForKey:#"scrollBlogTemplate"],[post objectForKey:#"url"],[post objectForKey:#"specialBtn"],[post objectForKey:#"btnNameScrollBlog"],[post objectForKey:#"latScrollBlog"],[post objectForKey:#"longScrollBlog"],[post objectForKey:#"openWebUrlScrollBlog"],[post objectForKey:#"gallery"], [custom objectForKey:#"author-name"], nil]];
}
I tried setting the custom_fields object as an id: id custom = [post objectForKey:#"custom_fields"];
And then using it to get to the author's name: [custom objectForKey:#"author-name"]
But I get an NSInvalidArgumentException', reason: '-[__NSArrayM rangeOfString:]: unrecognized selector error.
Any suggestions??
What if I try and get the category title from the post?
"categories": [
{
"id": 360,
"slug": "deals",
"title": "Deals",
"description": "",
"parent": 0,
"post_count": 28
}
],
Do I put the categories in an array like this? How do I get the title from that? I tried this and getting the object at index 3, but got an error.
NSArray *cat = [post objectForKey:#"categories"];

Answer 1

'-[__NSArrayM rangeOfString:]: unrecognized selector error. means that you are treating an array as a string. Your code is nearly correct, you just need to get the first item from the array (preferably with a check that the array isn't empty) because
"author-name":[
"John Doe"
]
is an array containing one string. So:
NSArray *names = [custom objectForKey:#"author-name"];
NSString *name = [names firstObject];
NSArray *categories = [custom objectForKey:#"categories"];
NSDictionary *category = [categories firstObject];
NSString *title = [category objectForKey:#"title"];