Array Objects update without assign

Question

I want to add image from Gallery/Camera to NSMutableDictionary & i am using following methods which i found Here

[dict setObject:UIImageJPEGRepresentation(chosenImage,0.5) forKey:@"image_four"];

[documents replaceObjectAtIndex:0 withObject:dict];

[tableOne reloadData];

In Cell for row at Indexpath

[cell.oneImgView setImage:[[UIImage alloc]initWithData:[dict objectForKey:@"image_four"]]];

I m adding NSMutableDictionary objects into one global array in ViewController A & Sending it to ViewController B where i add/update image from gallery/camera.

but when i press back button and go back UIViewController A and then again go to view controller B those images are still in that array.

In short, whenever i add image to Array of UIViewController B it some how affects to Array of UIViewController A.

I want this to be done on Done button click but if i click on back button of navigation bar it does the same as Done button.

- (IBAction)goToBack:(id)sender {

    [self.navigationController popViewControllerAnimated:YES];
}

Can someone tell me where i m going wrong?

Answer 1

Finally, solved by copying objects of NSObject class & adding it array.

[[controllerb setDocuments1]addObjectsFromArray:array];