Fail to addObject to NSMutableArray - iphone

Question

I am building this 'Add to favorite' with NSUserDefault. I am having this issue when adding array to NSMutableArray. Does anyone knows what I did wrong? Thank you very much.
NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
NSMutableArray *favoriteRecipes = [[NSMutableArray alloc] init];
if ([prefs objectForKey:#"myFavor"] == nil) {
//create the array
NSMutableArray *array = [[NSMutableArray alloc] init];
[prefs setObject:array forKey:#"myFavor"];
[array release];
}
NSMutableArray *tempArray = [[prefs objectForKey:#"myFavor"] mutableCopy];
favoriteRecipes = tempArray;
[tempArray release];
NSArray *charArray = [[NSArray alloc] initWithObjects: #"test1", #"test2" , nil];
//add the recipe
[favoriteRecipes addObject:[charArray objectAtIndex:0]];
//save the array to NSUserDefaults
[prefs setObject:favoriteRecipes forKey:#"myFavor"];
[prefs synchronize];

Answer 1

favoriteRecipes = tempArray;
instated of above line use be below line it will work fine
[favoriteRecipes addObjectsFromArray:tempArray];

Answer 2

done something like this yesterday. see my code below. im not sure if you want the same thing like I did.
NSDictionary *tempDictionary = [NSDictionary dictionaryWithObjectsAndKeys:productID,#"ID",productTitle,#"title",productPrice,#"price",imageUrl,#"image",shipping,#"shipping_day", nil];
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSMutableArray *cartList = [[defaults objectForKey:#"CART_ITEMS"] mutableCopy];
if(!cartList)
cartList = [[NSMutableArray alloc] init];
if([cartList indexOfObject:tempDictionary] == NSNotFound)
{
NSLog(#"add favorite");
[cartList addObject:tempDictionary];
[defaults setObject:cartList forKey:#"CART_ITEMS"];
[defaults synchronize];
[sender setTitle:#"Remove" forState:UIControlStateNormal];
}
else
{
NSLog(#"remove favorite");
[cartList removeObject:tempDictionary];
[defaults setObject:cartList forKey:#"CART_ITEMS"];
[defaults synchronize];
[sender setTitle:#"Add to cart" forState:UIControlStateNormal];
}
this is what I do everytime I want my favorite list from NSUserDefault
-(void)getCartList
{
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
NSMutableArray *cartList = [[defaults objectForKey:#"CART_ITEMS"] mutableCopy];
productListArr = [NSMutableArray arrayWithArray:cartList];
NSLog(#"cart list data == %#", cartList);
}