iOS Day 6

SecondViewController.h

@class SecondViewController;

@protocol SecondViewControllerDelegate <NSObject>
- (void)doSomethingWithSecondViewController:(SecondViewController *)secondViewController;
@end

@interface SecondViewController : UIViewController
@property (nonatomic, weak) id <SecondViewControllerDelegate> delegate;
- (IBAction)tappedCloseModal:(id)sender;

@end

SecondViewController.m

@implementation SecondViewController

@synthesize delegate;

- (IBAction)tappedCloseModal:(id)sender {
    [delegate doSomethingWithSecondViewController:self];
}

ViewController.h

#import <UIKit/UIKit.h>
#import "SecondViewController.h"

@interface ViewController : UIViewController <SecondViewControllerDelegate>
@property (weak, nonatomic) IBOutlet UILabel *lblInfo;
@property (weak, nonatomic) IBOutlet UITextField *txtText;
- (IBAction)tappedClickMe:(id)sender;
- (IBAction)tappedNavButton:(id)sender;
- (IBAction)tappedShowNewView:(id)sender;

@end

ViewController1.m

- (IBAction)tappedShowNewView:(id)sender {
    SecondViewController *secondViewController =
        [self.storyboard instantiateViewControllerWithIdentifier:@"secondViewController"];
    secondViewController.delegate = self;
    [self presentModalViewController:secondViewController animated:YES];
}

ViewController2.m

- (void)doSomethingWithSecondViewController:(SecondViewController *)secondViewController {
    [self dismissModalViewControllerAnimated:YES];
}