ios - UIViewController 不在 View 之间传递数据

Question

我正在尝试在 Storyboard 中的 UIViewController 之间传递一些数据。我在下面有一些代码来传递数据。当我在原始屏幕上记录我正在保存的字符串时，它很好，但是当我转到 UIDetailViewController 时，go 返回 (null)。我的问题是什么？？

原始 View Controller :

 -(void)tableView:(UITableView *) tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

    if (tableView==_countryTableView) {
        if (indexPath.section==0) {
            AthleteDataTransfer *dataTransfer = [[AthleteDataTransfer alloc] init];
            dataTransfer.name=@"Yo";
            dataTransfer.dob=@"01/01/2000";
            dataTransfer.description=@"I am awesome";
            dataTransfer.hometown=@"Launy";

            NSLog(@"%@", dataTransfer.name);

            [self performSegueWithIdentifier:@"showDetail" sender:self];

        }

    }
}

详细 View Controller :

AthleteDataTransfer *dataTransfer = [[AthleteDataTransfer alloc] init];
        _name.text=dataTransfer.name;
        dataTransfer.dob=_dob.text;
        dataTransfer.description=_description.text;
        dataTransfer.hometown=_hometown.text;

        NSLog(@"%@", dataTransfer.name);

Answer 1

代替在 tableViews didSelectRowAtIndexPath 中传递数据，在 prepareForSegue 方法中传递数据。

像这样:

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if ([segue.identifier isEqualToString:@"showDetail"]) {
        AthleteDataTransfer *dataTransfer = (AthleteDataTransfer *)[segue destinationViewController];
        dataTransfer.name=@"Yo";
        dataTransfer.dob=@"01/01/2000";
        dataTransfer.description=@"I am awesome";
        dataTransfer.hometown=@"Launy";
    }
}