iOS 7 NSJSONSerialization - ios

Question

I am trying to develop an app that parses json data. I have the following json :
{
myobject:[
{
id:184,
title: "test title"
}
]
}
I have the following code which im trying to get the title data from this json
NSData *jsonData = [NSData dataWithContentsOfURL:myURL];
NSError *error = nil;
NSDictionary *currentObject = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
if(error)
{
NSLog(#"%#",error);
}
NSDictionary *nar = [currentObject objectForKey:#"myobject"];
NSLog(#"%#",[nar valueForKey:#"title"]);
NSString *curTitle = [nar valueForKey:#"title"];
self.myTitle.text = curTitle;
When I log the title, I can see that the title is indeed coming back. However, when I try to set the myTitle.text I get the following error
Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI length]: unrecognized selector sent to instance 0x15631850

Answer 1

In your json my object field is not a dictionary, but array of dictionaries, so [nar valueForKey:#"title"] will return array of valueForKey for each of elements in that array.
If you're sure about data format you can extract string value from it the following way:
 NSArray *nar = [currentObject objectForKey:#"myobject"];
NSString *curTitle = nar[0][#"title"];
But of course it is better to add some data validation/error handling in production code.

Answer 2

It is crash because Your dictionary contain NSArray, not dictionary.
NSArray *ar = [currentObject objectForKey:#"myobject"];
for(NSDictionary *dict in ar)
{
NSLog(#"%#", [dict objectForKey:#"title"];
)
}
NSString *curTitle = [[ar objectAtIndex:0] objectForKey:#"title"];
self.myTitle.text = curTitle;

Answer 3

You are trying to assign NSArray to self.myTitle.text.
NSData *jsonData = [NSData dataWithContentsOfURL:myURL];
NSError *error = nil;
NSDictionary *currentObject = [NSJSONSerialization JSONObjectWithData:jsonData options:0 error:&error];
if(error)
{
NSLog(#"%#",error);
}
NSArray *nar = [currentObject objectForKey:#"myobject"];
NSString *title = [[nar objectAtIndex:0] objectForKey:#"title"];
NSLog(#"%#",title);
self.myTitle.text = title;