label not changing with Segue [duplicate]

问题

This question already has an answer here:

How can I set the value of a UILabel following a segue? (1 answer)

Closed 6 years ago.

I have a label on my DetailViewController and it's not changing when I try to edit it.

This is how my code currently looks like

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    if ([[segue identifier] isEqualToString:@"MySegue"]) {
        // Get destination view
       DetailViewController *vc = [segue destinationViewController];
        NSLog(@"Goes here");

       vc.titleLabel.text = @"My new UIlabel";

    }
}

回答1:

You could use NSNotification or better in your case use this via NSUserDefaults:

[[NSUserDefaults standardUserDefaults] setObject:@"My Label" forKey:@"detailTitle"];
[[NSUserDefaults standardUserDefaults] synchronise];

and in the viewWillAppear of the Detail you read it:

self.titleLabel.title = [[NSUserDefaults standardUserDefaults] objectForKey:@"detailTitle"];

来源：https://stackoverflow.com/questions/17506591/label-not-changing-with-segue