How to get values from nested array/ dictionary iOS 7 - ios

Question

I fetch values from dictionary and need to display in UITableView, but everything works fine.
On some spot it stops running and shows thread
-[__NSCFString objectAtIndex:]: unrecognized selector sent to instance 0xbfa7670
The code below, which I used to fetch value..
[NSString stringWithFormat:#"%#",[[pageCat1 valueForKeyPath:#"img3"] objectAtIndex:indexPath.row]]
My values are fetched properly in dictionary but lags to display it?
pageCat (
{
img3 = "http://xxx.in/images/page_cat_img/75x75/4.jpg";
name = "PVC Flexible Wires";
page = (
{
id = {
text = 1;
};
img4 = "http://xxxx.in/images/page_img/75x75/1.jpg";
name = "SINGLE CORE FLEXIBLE WIRES ABOVE 6 SQMM";
},
{
id = {
text = 72;
};
img4 = "http://xxx.in/images/page_img/75x75/72.jpg";
name = "SINGLE CORE FLEXIBLE WIRES BELOW 6 SQMM";
}
);
},
{
img3 = "http://xxx.in/images/page_cat_img/75x75/3.jpg";
name = "Bare Copper Wires";
page = {
id = {
text = 29;
};
img4 = "http://xxx.in/images/page_img/75x75/29.jpg";
name = "Tinned Copper Fuse Wires";
};
},
{
img3 = "http://xxx.in/images/page_cat_img/75x75/48.jpg";
name = "Properties of Wire";
page = {
id = {
text = 85;
};
img4 = "http://xxx.in/images/page_img/75x75/85.jpg";
name = "Wires - Normal, HR - PVC, FR, FRLS & Zero Halogen";
};
}
)
Actually look at the log value, it has array and set of values.. i can't find whether it is in what form..
Can anyone help me to find the solution??
Thanks,
Yazh

Answer 1

it looks like [pageCat1 valueForKeyPath:#"img3"] returns a NSString and not a NSArray like you expect
make sure that it returns a NSArray before applying objectAtIndex:
it seems that pageCat1 is a NSArray so you need to write something like:
NSString *path = pageCat1[0][#"img3"];
...

Answer 2

As the error already tells, [pageCat1 valueForKeyPath:#"img3"] returns a NSString and you are calling objectAtIndex: on it which is not recognized for this class. Obviously, pageCat1 differs from what you expected.
Try NSLog(#"%#", pageCat1); to see what it really looks like.
// Edit
pageCat1 (as seen in your update) is an NSArray that contains items of type NSDictionary. What you really want to do is NSString *imgURL = [[pageCat1 objectAtIndex:indexPath.row] objectForKey:#"img3"];
Explanation:
1. [pageCat1 objectAtIndex:indexPath.row] returns a NSDictionary
2. [__dictionary__ objectForKey:#"img3"] returns the NSString containing your image URL

Answer 3

Actually I used XML data, for that i used third party to parse data. Its all of third party which parsed alternate data as array and other as non-array. Finally I check the array with
isKindOfClass
and convert it into array. Therefore my problem in app solved. :-)
Thanks to all who help me..

Answer 4

Please try this one:
//Assuming json is your main dictionary
NSDictionary *pageCat = [json objectForKey:#"pageCat"];
NSMutableArray *array = [[pageCat valueForKey:#"img3"]mutableCopy];
NSLog(#"Value=%#", [array objectAtIndex:indexPath.row]);