将值从一个视图控制器传递给另一个视图控制器的问题

Question

I have one view controller. I added popoverviewcontroller on button action and loaded another viewcontroller which has a uitableview controller. When I select a value inside the tableview controller, I am not able to pass the selected value into firstviewcontroller.

The value is coming as null

Second ViewController is having UITableview

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

    [[NSNotificationCenter defaultCenter] postNotificationName:@"RemovePopOverController" object:self];
    selectedValue =   [titleArray objectAtIndex:indexPath.row];

}

firstviewController

-(void)removePopOver:(id)sender{

    [self->popoverController dismissPopoverAnimated:YES];

    NSString *value = m_titleViewController.selectedValue; 


  NSLog(@" Value is %@", value);
}

I don't want to use NSUserDefault. Please advice me with a solution for this issue!

Thanks in advance.

Answer 1

You are posting the notification before setting the value. Try doing it like this:

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
    selectedValue =   [titleArray objectAtIndex:indexPath.row];
    [[NSNotificationCenter defaultCenter] postNotificationName:@"RemovePopOverController" object:self];
}

Answer 2

Use delegate for your requirement as it best pratcice to use in this situation rather than posting notification.

Refer simple-delegate-tutorial-for-ios-development link. Hope helpful.

Answer 3

Then you can use Another method like This :

Create a String in Appdelegate (ex: stringValue)

First save your Value into your Appdelegate:

 Appdelegate *appdell=[[UIApplication sharedApplication]delegate];
    appdell.stringValue=@"Your Value Goes Here";

when ever you want you can get this value.

Appdelegate *appdell=[[UIApplication sharedApplication]delegate];

requiredvalue=appdell.stringValue;