call popover and send back variable to previous uiview

Question

I have an UITableViewController created with storyboard. Than I have an anchor that call a popOver created with storyboard as well. The popover is another UItableViewController, when I click on a row I should call back the first controller and pass an object. I have tried this in the popover object:

(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

if ([[segue identifier] isEqualToString:@"Fortune"]){

NSIndexPath *indexPath = (NSIndexPath *)sender;

ASFortuneTeller * aController = [segue destinationViewController];
[aController setWYPT:[allWYPTs objectAtIndex:indexPath.row]];

} }

Basically I need to pass a NSMutableDictionary bag to the first UITableViewController. But I have noticed that in this way I create a new ASFortuneTeller object , that is not what I want... I want just to call back the first controller and pass an object.

How can I do it?

ChiellieNL ChiellieNL · Accepted Answer · 2017-01-11T23:05:31

A quick solution (when it involves always the same two classes) could be:

In the .h file of the first view controller, define a method (or just a property):

-(void)selectedWYPT:(NSMutableDictionary*)wypt;

Within the .h file of your second view controller make a property

@property FirstUIViewController *firstView;

In the first view controller, you will open the second view controller via a segue, so there you can use:

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"segueIdentifier"]) {
        SecondUIViewController *destination = segue.destinationViewController;
        destination.firstView = self;
    }
}

When the row is selected in the second view you can use

if (self.firstView)    
    [self.firstView setWYPT:[allWYPTs objectAtIndex:indexPath.row]];

to pass the data back to the first view.

As said, this would be a quick solution when always the same two classes are involved.

An other way would be to use protocols. When the first view controller won't always be FirstUIVierController, you may use something like this:

SecondUIViewController.h

@class SecondUIViewController;
@protocol SecondUIViewControllerDelegate <NSObject>

-(void)secondUIViewController:(SecondUIViewController*)controller didSelectWYPT:(NSMutableDictionary*)wypt;

@end

@interface SecondUIViewController : UIViewController

@property id<SecondUIViewControllerDelegate> delegate;

@end

SecondUIViewController.m

where the row is selected:

if (self.delegate && [self.delegate respondsToSelector:@selector(secondUIViewController:didSelectWYPT:)])
    [self.delegate secondUIViewController:self didSelectWYPT:[allWYPTs objectAtIndex:indexPath.row]];

AnyOtherUIViewController.h

#import "SecondUIViewController.h"

@interface AnyOtherUIViewController : UIViewController <SecondUIViewControllerDelegate>

...
...

AnyOtherViewController.m

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"segueIdentifier"]) {
        SecondUIViewController *destination = segue.destinationViewController;
        destination.delegate = self;
    }
}

-(void)secondUIViewController:(SecondUIViewController*)controller didSelectWYPT:(NSMutableDictionary*)wypt {
    //do something with the data
}

call popover and send back variable to previous uiview

1 Answers