Getting value from NSDictionary to NSMutableArray - iphone

Question

I have this NSDictionary:
Categorys = {
Category = (
{
categoryDescription = {
text = " Description";
};
categoryIconPath = {
text = " 7.jpg";
};
categoryId = {
text = " 25";
};
categoryName = {
text = " My Photos";
};
categoryStatus = {
text = " ON";
};
publicPrivate = {
text = " Private";
};
userId = {
text = " 2";
};
},
..................
I want to get the categoryName (like here My Photos) into my NSArray.
How can I do this?
I am unable to get it
I have tried this code from http://troybrant.net/blog/2010/09/simple-xml-to-nsdictionary-converter/
NSString *category = [[[[xmlDictionary objectForKey:#"Categorys"] objectForKey:#"Category"] objectForKey:#"categoryName"] stringForKey:#"text"];
but it gives error
2012-03-27 15:30:35.320 File[1481:903] -[NSCFArray objectForKey:]: unrecognized selector sent to instance 0x1462c0

Answer 1

In Categories, the object referenced by the Category key is an array, you can tell by the fact that its contents are bracketed by parentheses ( ... ) not braces { ... }.
Looking at your code and breaking it down:
NSString *category = [[[[xmlDictionary objectForKey:#"Categorys"] // This is the outermost dictionary
objectForKey:#"Category"] // This is an NSArray
objectForKey:#"categoryName"] stringForKey:#"text"];
// This breaks NSArray doesn't respond to objectForKey:
Breaking it down a bit, you need:
NSDictionary* categorys = [xmlDictionary objectForKey:#"Categorys"];
NSArray* categoryArray = [categorys objectForKey: #"Category"];
NSDictionary* category = [categoryArray objectAtIndex: i]; // i is the index of the category you want e.g. 0
// etc

Answer 2

The answer is in the error message. One of the objects that you are getting from
NSString *category = [[[[xmlDictionary objectForKey:#"Categorys"] objectForKey:#"Category"] objectForKey:#"categoryName"] stringForKey:#"text"];
Doesn't have the selector objectForKey.
Now you need to break down your code and do some debugging to find out where you are going wrong.

Answer 3

Was getting the same error "[NSCFArray objectForKey:]: unrecognized selector sent to instance"
When I looked at the structure of my plist file that was loaded from the bundle at runtime, it did not seem possible that I was using the wrong selectors. The problem is that when I ran the app, it was not pulling the original plist from the bundle, it was pulling a saved plist from my apps directory. Because the saved plist had an incorrect, and completely different structure than my original plist, I indeed was using the wrong selectors.