Pass Data to Root View Controller

Question

I have a simple application with the following structure:

• 'A': Standalone view controller with a WebView
• 'B': Navigation controller
• 'C': Root View Controller in 'B', a TableView of all stores

When the URL of the WebView in 'A' becomes something specific (http://www.mysite.com/store), I need to:

1. Push to 'C'
2. Send a string to be used in 'C'

How can I achieve this?

Answer 1

Here you can do with delegate methods   

// This is your root ViewController to call delegate methods

#import "ThirdViewController.h"
#import "SecondViewController.h"
 @interface ViewController ()<ThirdViewControllerDelegate>
  @end

@implementation ViewController
 #pragma mark -
 #pragma mark ThirdViewController Delegate Method

// Implementation of delegate methods in your Root ViewController

-(void)didSelectValue:(NSString *)value{
    NSLog(@"%@",value);
}

// Pass the last Vc delegate to the next ViewController

-(void)gotoSeconddVc{
    SecondViewController *vc2=[[SecondViewController alloc]init];
    vc2.lastDelegate=self;
    [self.navigationController pushViewController:vc2 animated:YES];
}


 #import "ThirdViewController.h"
     @interface SecondViewController : UIViewController
        @property(nonatomic,retain) id <ThirdViewControllerDelegate> lastDelegate;
        @end

-(void)gotoThirdVc{
    ThirdViewController *vc3=[[ThirdViewController alloc]init];
    vc3.delegate=self.lastDelegate;
    [self.navigationController pushViewController:vc3 animated:YES];
}

Implementation of last viewcontroller

@implementation ThirdViewController


-(void)btnDoneClicked{
    [self.navigationController popToRootViewControllerAnimated:YES];
    [self.delegate didSelectValue:strValue]; //call delegate methods here
}