Sending data from one ViewController to another.

Question

I have got two ViewController:

1) ViewController

2) TestAppViewController

In ViewController.h

Answer 1

Using delegate:

In TestAppViewController.h:

   @protocol messageDelegate <NSObject>
    @optional
    -(void)test:(NSString*)str;
    @end
    @interface SecondViewController : NSString
    @property (nonatomic, assign) id <messageDelegate> delegate;
    @end

In TestAppViewController.m:

-(void)readyToSend
{
    [self.delegate test:@"Hello world!"];

}

In ViewController.h:

@interface ViewController : UIViewController<messageDelegate>
@end

In ViewController.m: in

- (void)viewDidLoad {
TestAppViewController * testAppViewController = [[TestAppViewController alloc] init];
testAppViewController.delegate = self;
}
-(void) test:(NSString*)str{
NSLog(@"%@,str");
}

Hope it will help!