Question

I have a tableviewcontroller with data population it. I’m trying to get a new details view to be pushed when the user taps on a cell. I can get the view to load, however the labels to show the data in more detail are not updated. Here is the code:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

[tableView deselectRowAtIndexPath:indexPath animated:YES];

SearchDetailViewController *controller = [self.storyboard  instantiateViewControllerWithIdentifier:@"searchDetailVC"];
Events *event = [events objectAtIndex:indexPath.row];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterLongStyle];
NSString *dateString = [dateFormatter stringFromDate:event.eventDate];

controller.title=event.eventName; //ONLY ONE THAT WORKS!


controller.eventName.text = event.eventName;
controller.eventAddress.text = event.eventAddress;
controller.eventDate.text = dateString;
controller.eventTime.text = event.eventTime;
controller.ratingView.image = [self imageForRating:event.eventRating];
controller.eventDistance.text = @"NOT YET IMPLEMENTED";

[self.navigationController pushViewController:controller animated:YES];
}

The only property that is set is the title of the NavigationController navbar. Am I doing something drastically wrong?

Answer 1

You can’t pass data like this. ViewController.domainField is nil at that time because the view hasn’t loaded yet, and the label/TextField is created when the view loads (via a nib) and not as soon as the view controller object is created.

This code can help you

SearchDetailViewController.h
    #import <UIKit/UIKit.h>
    @interface SearchDetailViewController : UIViewController 
    {

        NSString*  eventNameString ;
        NSString* eventAddressString;
        ...........
        .............

    }
    @property (nonatomic,retain) NSString*  eventNameString ;
    @property (nonatomic,retain) NSString*  eventAddressString;
    ...............
    ...............
    @end


SearchDetailViewController.m
- (void)viewDidLoad
{
     [super viewDidLoad];
     eventName.text=eventNameString;
     eventAddress.text=eventAddressString;
     ..........................
     ..........................
    eventNameString=[[NSString alloc]initWithString:@""];
}


TableView.m

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

[tableView deselectRowAtIndexPath:indexPath animated:YES];

SearchDetailViewController *controller = [self.storyboard  instantiateViewControllerWithIdentifier:@"searchDetailVC"];
Events *event = [events objectAtIndex:indexPath.row];

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
[dateFormatter setDateStyle:NSDateFormatterLongStyle];
NSString *dateString = [dateFormatter stringFromDate:event.eventDate];

controller.title=event.eventName; //ONLY ONE THAT WORKS!


controller.eventNameString=[[NSString alloc]initWithString:event.eventName];
controller.eventAddressString=[[NSString alloc]initWithString:eventAddress];
...............................
...............................
............

[self.navigationController pushViewController:controller animated:YES];
}

Likewise, you have to pass all data from one view to another view – you can’t directly assign to controller.