在视图控制器segue之间传递数据[重复]

我的第一个视图控制器，AllAthletes，是我所有核心数据实体的 uitableview。它在字幕样式表格单元格中显示实体“运动员”及其属性，例如名字等。当您单击视图单元格时，我希望此视图控制器传递所选实体的信息，但我'我不确定如何将此信息（索引路径的托管对象、实体、属性等）传递到详细视图控制器。有人可以指出我正确的方向吗？

Allathletes.m

-(void)viewWillAppear:(BOOL)animated{
    AppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
    _managedObjectContext = [appDelegate managedObjectContext];

    NSFetchRequest *request = [[NSFetchRequest alloc] init];
    NSEntityDescription *athlete = [NSEntityDescription entityForName:@"Athlete" inManagedObjectContext:_managedObjectContext];
    [request setEntity:athlete];
    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"first" ascending:YES];
    NSArray *sortDescriptors = [[NSArray alloc]initWithObjects:sortDescriptor, nil];
    [request setSortDescriptors:sortDescriptors];

    NSError *error = nil;
    NSMutableArray *mutableFetchResults = [[_managedObjectContext executeFetchRequest:request error:&error] mutableCopy];
    if (mutableFetchResults == nil){
        //handle error
    }
    [self setAthleteArray:mutableFetchResults];
    [self.tableView reloadData];
}



 //this is what I have so far
 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
 {
     if ([segue.identifier isEqualToString:@"setAthlete"]) {
         NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
         AthleteDetail *destViewController = segue.destinationViewController;
     }
 }

//i was also thinking something like this?
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UIViewController* detailViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailViewController"];
    NSMutableString *object = thisArray[indexPath.row];
    detailViewController.passedData = object;
    [self.navigationController pushViewController:detailViewController animated:YES];
}

它向您推送的第二个控制器是 AthleteDetail。感谢您的时间。

您正在混合两个不同的概念。代替

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    UIViewController* detailViewController = [self.storyboard instantiateViewControllerWithIdentifier:@"DetailViewController"];
    NSMutableString *object = thisArray[indexPath.row];
    detailViewController.passedData = object;
    [self.navigationController pushViewController:detailViewController animated:YES];
}

你应该做类似的事情

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [self performSegueWithIdentifier:YOUR_SEGUE_IDENTIFIER sender:self];        
}

进而：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
 {
     if ([segue.identifier isEqualToString:YOUR_SEGUE_IDENTIFIER]) {
         NSIndexPath *indexPath = [self.tableView indexPathForSelectedRow];
         AthleteDetail *destViewController = segue.destinationViewController;
         // set whatever you want here in your destination view controller
         destViewController.passedData = object;
     }
 }

并确保您的 Segue 是 Push Segue。