CODEWITHSUNDEEP
iosobjective-cxcodeuistoryboarduistoryboardsegue
Doug Smith
Doug Smith

Reputation: 29326

Using storyboard unwinds, how do I take data from the view controller I'm returning from and use it in the view controller I returned to?

I have everything implemented, and the following method that fires when I return to the source view controller:

- (IBAction)returned:(UIStoryboardSegue *)segue {
    ...
}

I want to take the value from the UITextField in the view I'm returning from, and set a value in my source view (or the view that calls this method) to the value of that UITextField.

I tried this:

- (IBAction)returned:(UIStoryboardSegue *)segue {
    AddTextViewController *returnedFromViewController = segue.destinationViewController;
    NSString *inputtedText = returnedFromViewController.textField.text;
    self.foo = inputtedText;
}

But I get this error: 

[RootViewController textField]: unrecognized selector sent to instance 0x8dc0250
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[RootViewController textField]: unrecognized selector sent to instance 0x8dc0250'

What am I doing wrong in that code above? There's hardly any documentation on this, so it's very hard to search around myself.

Upvotes: 2

Views: 991

Answers (2)

Mark McCorkle
Mark McCorkle

Reputation: 9414

The best way to do this is to implement a protocol / delegate. The delegate will handle any requests from your destination view controller and send the data back to your source view controller.

http://iosdevelopertips.com/objective-c/the-basics-of-protocols-and-delegates.html

Upvotes: 0

BJ Homer
BJ Homer

Reputation: 49034

You're using the wrong controller. You want the segue's sourceViewController, not the destinationViewController. Otherwise, you're doing it all correctly.

Upvotes: 3

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