Pass data between view controllers WITHOUT segues - ios

Question

I'm using storyboard and I have a view that loads dynamic buttons. On click of this button, I need to load the second view controller and also pass data. I cannot use segue as its dynamic button.
I use following code to load the second view controller
UIStoryboard* sb1 = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone"
bundle:nil];
UIViewController* vc1 = [sb1 instantiateViewControllerWithIdentifier:#"SecondViewController"];
[self.navigationController pushViewController:vc1 animated:YES];
In the 2nd view controller, I need to access about 5 fields from the 1st view controller. How do I pass the data?

Answer 1

You can create a Segue not bounded to a button by ctrl+drag from the first controller to the second one (don't forget to give this segue and identifier).
Next In the IBAction of the button (set via Interface Builder or via addTarget:self action:forControlEvents: ) you can call the [self performSegueWithIdentifier:#"YourSegueIdentifier" sender:button];
You can pass the data to the second controller, as usual, in - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender

Answer 2

Try something like that:
Class A
// CLASS_A.h
#import <UIKit/UIKit.h>
#interface CLASS_A : UIViewController {
...
}
- (IBAction)Btn_PushPressed:(id)sender;
...
#end
// CLASS_A.m
#import "CLASS_A.h"
#import "CLASS_B.h"
#implementation CLASS_A
- (IBAction)Btn_PushPressed:(id)sender
{
UIStoryboard* sb1 = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone"
bundle:nil];
CLASS_B* vc1 = [sb1 instantiateViewControllerWithIdentifier:#"SecondViewController"];
vc1.delegate = self;
[self.navigationController pushViewController:vc1 animated:TRUE];
}
....
#end
Class B
// CLASS_B.h
#import <UIKit/UIKit.h>
#class CLASS_A;
#interface CLASS_B : UIViewController {
...
}
#property (weak, nonatomic) CLASS_A *delegate;
....
#end
// CLASS_B.m
#import "CLASS_B.h"
#import "CLASS_A.h"
#implementation CLASS_B
....
#end

Answer 3

This is how to do it in Swift 2.0. Instead of using prepareForSegue,
Swift 3.0
let someViewConroller = self.storyboard?.instantiateViewController(withIdentifier: "SomeViewController") as! SomeViewController
someViewConroller.someObject = self.someObject!
self.navigationController?.pushViewController(someViewConroller, animated: true)
Swift 2.0
let someViewConroller = self.storyboard?.instantiateViewControllerWithIdentifier("SomeViewController") as! SomeViewController
someViewConroller.someObject = self.someObject!
self.navigationController?.pushViewController(someViewConroller, animated: true)

Answer 4

Swift 3
let destinationView = self.storyboard?.instantiateViewController(withIdentifier: "ID") as! ViewController2
destinationView.Value2 = Value1
self.present(destinationView, animated: true, completion: nil)

Answer 5

You can simply use
NSUserDefaults
to store the data and retrieve in what ever page you need
In view controller A
[[NSUserDefaults standardUserDefaults] setObject:aData forKey:#"DATA"];
[[NSUserDefaults standardUserDefaults] synchronize];
In destination Controller
NSData * aData = [[NSUserDefaults standardUserDefaults] valueForKey:#"DATA"];

Answer 6

firstly you can use segue even you have dynamic buttons, just add target method to UIButtons and push view controller using segue in that method. in the second view controller, take few properties and assign values to those properties before you push second view controller. like:
UIStoryboard* sb1 = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone"
bundle:nil];
UIViewController* vc2 = [sb1 instantiateViewControllerWithIdentifier:#"SecondViewController"];
[vc2 setName:#"name"];
[self.navigationController pushViewController:vc2 animated:YES];
before that you need to assign property to a NSString *name in SecondViewController

Answer 7

You can define a protocol: PassValueDelegate,and in the first viewController you can implement this protocol.
UIStoryboard* sb1 = [UIStoryboard storyboardWithName:#"MainStoryboard_iPhone" bundle:nil];
UIViewController* vc1 = [sb1 instantiateViewControllerWithIdentifier:#"SecondViewController"];
//set the delegate for the second view controller,so you can access the values in the first controller
vc1.delegate = self;
[self.navigationController pushViewController:vc1 animated:YES];