how to Share Data Count (Relationship in Coredata) - iphone

Question

I have a question...
I have couple(2) of ViewCotroller.
name are ViewController and DetailViewController
DetailViewController has data(Relationship in Coredata).
this is DetailViewController code.
NSSet *tags = self.bookInfo.details.tags;
tagNamesArray = [[NSMutableArray alloc] initWithCapacity:tags.count];
for (Voca_Tag *tag in tags) {
[tagNamesArray addObject:tag.mean];
}
I want using that tagNamesArray.count in ViewController.
also, I was used
DetailViewController *detailViewController = [[DetailViewController alloc]init];
[detailViewController.tageNamesArray count];
it didn't work.
I want use the Count to cell.text on UITableView.
pastebin.com/RwuR6PDt << ViewController
pastebin.com/2F345vg7 << DetaulViewController
plz Check...

Answer 1

You should write your delegate: In SecondViewController.H:
#protocol messageDelegate <NSObject>
#optional
-(void) sendDataCount:(NSInteger) i;
#end
#interface SecondViewController : NSString
#property (nonatomic, assign) id <messageDelegate> delegate;
#end
In SecondViewController.m:
-(void)readyToSend
{
[self.delegate sendDataCount:__YOURCOUNT__];
}
In ViewController.h:
#interface ViewController : UIViewController<messageDelegate>
#end
In ViewController.m: in
- (void)viewDidLoad {
SecondViewController *secondViewController = [[SecondViewController alloc] init];
secondViewController.delegate = self;
}
-(void) sendDataCount:(NSInteger) i
{
NSLog(#"Your Count = %d",i);
//send Data using POST method
}
Hope it will help!

Answer 2

This is because tafNamesArray does not have memory allocation at that time and hence this array will returns nil and its count will be zero .
If you want to get [tafNamesArray count ] ,first call that method which initilize tafNamesArray, for example :
In DetailViewController
-(void)array
{
NSSet *tags = self.bookInfo.details.tags;
tagNamesArray = [[NSMutableArray alloc] initWithCapacity:tags.count];
for (Voca_Tag *tag in tags) {
[tagNamesArray addObject:tag.mean];
}
}
then In ViewController
call :
DetailViewController *detailViewController = [[DetailViewController alloc]init];
//First call this method
[detailViewController array];
//then this line will work
int i = [detailViewController.tafNamesArray count];