Question

I have two UITableViewControllers. One displays a list of names and on tapping any cell will push the second TableViewController which enables the user to edit the name in a UITextField.

Now I am able to pass the name string from the first TableViewController to the second. (I’m doing this by creating a property in the second TableViewController which I’m setting just before pushing the second TableViewController) But how do I pass the edited name string from the second to the first (so that I can update the first table with the edited name)?

Answer 1

Create a mutable array property in the first controller, and pass that array and an index to the second controller.

FirstController.h

   @property (nonatomic,retain)     NSMutableArray *myStrings;

FirstController.m

   @synthesize myStrings;

   init {
         self.myStrings = [NSMutableArray arrayWithCapacity:8];
   }


   didSelectRowAtIndexPath {

     SecondVC *vc = [[SecondVC new];
     [self.theStrings addObject:@"Original String"]; // or replaceAtIndex: indexPath.row
     vc.theStrings = self.myStrings;
     vc.theIndex   = indexPath.row;
     //push detail vc.
   }

SecondController.h

  @property (nonatomic, retain) NSMutableArray *theStrings;
  @property (nonatomic        ) int             theIndex;

SecondController.m

  @synthesize theStrings;
  @synthesize theIndex;

  doneEditingMethod {
       [self.theStrings replaceObjectAtIndex: self.theIndex withObject: myNewString];
   }