Passing data from view controller to tab bar controller in iOS

Question

I'm developing an iOS app and now I'm at a loss. I'm trying to pass data from the first View Controller to the first tab of a TabBarViewController (with using the storyboard). I found a lot of tutorials that explain how to pass data between view controllers, but nothing worked with my tab bar. I know that the tab bar controller contains a kind of array of views. The relation between the View Controller and the Tab Bar Controller is realized using a segue (push). So, I thought it is easy to use the prepareForSegue() - method. Like that:

 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
 if ([[segue identifier] isEqualToString:@"tab"]) {

 // ...

    } 
 }  

Unfortunately, the relation between the Tab Bar Controller and each tab bar view is no real segue. It's only a "relationship". That means, there is no segue identifier I am able to use for the the method above-mentioned. Is there a possibility to use the prepareForSegue in this case? If not, any ideas how to solve this problem? I know that there is a similar question, but the answer wasn't that helpful. Do I have to create a new file for every tab (view) within the tab bar controller? Or is it possible to have one class (m. & h.) for the whole tab bar controller, accessing the several view with objectAtIndex()?

Thanks in advance!

Answer 1

If your hierarchy is Viewcontroller->UItabbarcontroller->ViewCOntroller

in my case i have to send data to marketviewcontroller . In tabcontroller, marketviewcontroller is present at index 0.

  - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
  {
 if ([[segue identifier] isEqualToString:@"tab"])
  {
    UITabBarController *tabar=segue.destinationViewController;
    MarketViewController *marketViewcontroller=[tabar.viewControllers objectAtIndex:0];

   // pass data to market view controller
    [marketViewcontroller passobject:Yourdata];
 //   or 
  marketViewcontroller.value=Yourdata
  } 
  }  

in MarketViewController.h 
 @property(nonatomic,retain) NSString * value;