Why isn't my segue being performed?

Question

I have a segue that should take place when one of a number of things happen, so it's called programatically, like so:

- (void)unwindAway
{
    NSLog(@"Let's segue");
    [self performSegueWithIdentifier:@"mySegue" sender:self];
    NSLog(@"We should have just performed the segue");
}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    NSLog(@"Let's do a segue");
}

but the output I get in the console is:

2014-05-29 22:20:30.173 My App[7848:60b] Let's segue
2014-05-29 22:20:30.178 My App[7848:60b] We should have just performed the segue

so as you can see, it's not even calling prepareForSegue.

The segue name is correct - if I give an invalid segue name it errors as you'd expect.

Any ideas?

Answer 1

As per Rob's suggestion in the comments I checked the name of the method in the destination View Controller in the segue. It looked right (and was selected in IB rather than typed) but pasting over it and recompiling fixed the problem. Something must have been messed up in the source code of the storyboard, perhaps an artefact of renaming methods.

It's worth noting if anyone has a similar issue that the app won't generate any error if the destination method of a segue isn't found anywhere (I've confirmed this by typing a nonsense method name).