UIActionSheet按钮进入新的ViewController

Question

我试图在UIActionSheet调用segue上设置按钮，这些按钮会转到其他视图控制器。这是我到目前为止的代码，它只是崩溃。我收到的错误消息是＆＃34;＆＃39;接收者（）没有带标识符的segue＆＃39; Town＆＃39;＆＃39;＆＃34;

- (IBAction)CategorizeButton:(id)sender {
UIActionSheet* AS = [[UIActionSheet alloc]initWithTitle:@"Group by"
                                                delegate:self
                                      cancelButtonTitle:@"Cancel"
                                 destructiveButtonTitle:nil
                                      otherButtonTitles:@"Town",@"Title",@"Location", nil];
[AS showInView:self.view];
}

-(void)actionSheet:(UIActionSheet *)actionSheet willDismissWithButtonIndex:(NSInteger)buttonIndex
{
    if (buttonIndex == 0)
    {
        [self performSegueWithIdentifier:@"Town" sender:self];
    }
    if (buttonIndex == 1)
    {
        [self performSegueWithIdentifier:@"Title" sender:self];
    }
    if (buttonIndex == 2)
    {
        [self performSegueWithIdentifier:@"Location" sender:self];
    }
}


-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
    NSString* CategorizeTown = @"Town";
    NSString* CategorizeTitle = @"Title";
    NSString* CategorizeLocation = @"Location";

    if ([[segue identifier] isEqualToString:CategorizeTown])
    {
        CategoryTableViewController* CAT = [segue destinationViewController];
        // blah blah
    }
    if ([[segue identifier] isEqualToString:CategorizeTitle])
    {
        CategoryTableViewController* CAT = [segue destinationViewController];
        // blah blah
    }
    if ([[segue identifier] isEqualToString:CategorizeLocation])
    {
        CategoryTableViewController* CAT = [segue destinationViewController];
        // blah blah
    }
}

Answer 1

在故事板中，选择segue。

给它一个标识符，（在你的情况下，@＆＃34; Town＆＃34;，@＆＃34; Title＆＃34;，@＆＃34; Location＆＃34;）