Wsrtjtyk

SendDataVc.m - Sending data from.

GetDataVC.m - Retrieving the data sent from SendDataVc.m

SendDataVC.m:

NSString *theData = @"Sending data";



GetDataVC *passdataVC = [[GetDataVC alloc] init];



passdataVC.theData = theData;

GetDataVC.h:

@property (strong, nonatomic) NSString *theData;

GetDataVC.m:

-(void) getData

{

    NSLog( @"%@", _theData);

}

I tried doing this way but I got null instead.

I think the application doesn't running to the function - (void) getData, you should call this function at - (void)viewDidLoad or - (void)viewWillAppear or something else like below:

- (void)viewDidLoad {

    [super viewDidLoad];

    [self getData];

}

-(void)getData {

    NSLog(@"%@", _theData);

}

You can't instantiate a UIViewController that way.

Use the following approach, in which @"GetDataVC" is the identifier of the view controller you are going to instantiate:

GetDataVC *passdataVC = (GetDataVC*)[self.storyboard instantiateViewControllerWithIdentifier:@"GetDataVC"];

passdataVC.theData = theData;

Where you execute the function getData?
If you execute getData at viewDidLoad or init or somewhere before you set the data.
You can execute the function through a button.
I think that will deal the problem.

Just implement the setter of theData property.

Paste the code below to your GetDataVC.m.

- (void)setTheData:(NSString *)theData {

    _theData = theData;

    NSLog(@"theData has set: %@", _theData);

}

refrence: Apple Document