CODEWITHSUNDEEP
core-datadelegates
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Reputation: 171

Passing A Delegate In prepareForSegue Method

I am having a problem passing an object from a TableView to a ViewController in an IOS app. I am using storyboard and have elected ARC and passing the delegate in my "prepareForSegue" method.

Here is my code in my TableView which segues via a push to another ViewController:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {

    NextViewController *vc = (NextViewController *)[segue destinationViewController];

    vc.managedObjectContext = managedObjectContext;

    if ([[segue identifier] isEqualToString:@"EditCategory"])
    {

    NSInteger selectedIndex = [[self.tableView indexPathForSelectedRow] row];

    //  I get a red warning which states "Cast of 'NSInteger' (aka 'int') to 'Entity' is disallowed with ARC" on this line:
    [vc setEntity:(Entity *)selectedIndex];
    }
}

Does anybody have any suggestions for how I can pass my object from the TableView to the ViewController? I am new to programming and have tried various expressions but nothing seems to work.

Upvotes: 0

Views: 773

Answers (1)

jlstrecker
jlstrecker

Reputation: 5033

The error you're getting has to do with types.

The class NextViewController apparently has a method called -setEntity: that takes an object of type Entity *. The error is because you're trying to give -setEntity: an argument of the wrong type. You're trying to give it an NSInteger (which is a number like 0, 5, -999), but it wants an Entity.

You're on the right track for passing data from the table view to the NextViewController. You just need to do one of the following:

  • pass an Entity to -setEntity: (does the Entity class perhaps have a constructor that takes an NSInteger?)
  • add a method to NextViewController that takes an NSInteger, and call that instead of -setEntity:

Upvotes: 1

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