ios - 主从应用程序中的 EXC_BAD_ACCESS(code=1) 错误

Question

当我更改详细 View 时，我的 iPad 应用程序崩溃了。我设置了一个异常断点来查明导致问题的代码行。它似乎偶尔会发生，所以我不太确定发生了什么。有什么建议吗？

例如，它在这一行崩溃了:

self.splitViewController.viewControllers = details;

在我的主视图 Controller 中的 didSelectRowAtIndexPath 方法中

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (indexPath.row == 0)
    {
        KFBDetailViewController *detailViewController = [[KFBDetailViewController alloc] initWithNibName:@"KFBDetailViewController_iPad" bundle:nil];
        UINavigationController *detailNavigationController = [[UINavigationController alloc] initWithRootViewController:detailViewController];

        NSMutableArray *details = [self.splitViewController.viewControllers mutableCopy];

        [details replaceObjectAtIndex:1 withObject:detailNavigationController];

        self.splitViewController.viewControllers = details;

        KFBAppDelegate *appDelegate = (KFBAppDelegate *)[[UIApplication sharedApplication]delegate];
        appDelegate.window.rootViewController = self.splitViewController;
    }

它在另一个 View 中也是这样做的:

appDelegate.splitViewController.viewControllers = details;

这是那个的 didSelectRowAtIndexPath:

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    NSMutableArray *details = [self.splitViewController.viewControllers mutableCopy];

    UINavigationController *detailNav = [[UINavigationController alloc]initWithRootViewController:webViewController];

    [details replaceObjectAtIndex:1 withObject:detailNav];

    KFBAppDelegate *appDelegate = (KFBAppDelegate *)[[UIApplication sharedApplication]delegate];

    appDelegate.splitViewController.viewControllers = details;
    appDelegate.window.rootViewController = self.splitViewController;
    appDelegate.splitViewController.delegate = webViewController;

    [appDelegate.splitViewController viewWillAppear:YES];

    // Grab the selected item
    RSSItem *entry = [[channel items]objectAtIndex:[indexPath row]];

    NSLog(@"Channel Items: %@", [[channel items]objectAtIndex:[indexPath row]]);

    // Construct a URL with the link string of the item
    NSURL *url = [NSURL URLWithString:[entry link]];

    NSLog(@"Link: %@", [entry link]);

    // Construct a request object with that URL
    NSURLRequest *req = [NSURLRequest requestWithURL:url];

    NSLog(@"URL: %@", url);

    // Load the request into the web view
    [[webViewController webView]loadRequest:req];
    webViewController.hackyURL = url;
    NSLog(@"Request: %@", req);

    // Set the title of the web view controller's navigation item
    [[webViewController navigationItem]setTitle:[entry title]];

    NSLog(@"Title: %@", [entry title]);
}

编辑:当我选择主视图 Controller TableView 中的第一行以显示初始详细信息 View 然后选择另一行以显示不同内容时，应用似乎崩溃了。如果我在任何时候都不选择第一行，一切正常。

Answer 1

我设法通过调整在主视图中点击第一行时显示初始详细 View 的方式来解决问题。

您可以在我的原始帖子中看到原始实现。以下是我的更改方式。

if (indexPath.row == 0)
    {
        KFBDetailViewController *detailViewController = [[KFBDetailViewController alloc]initWithNibName:@"KFBDetailViewController_iPad" bundle:nil];

        NSMutableArray *details = [self.splitViewController.viewControllers mutableCopy];

        UINavigationController *detailNav = [[UINavigationController alloc]initWithRootViewController:detailViewController];

        [details replaceObjectAtIndex:1 withObject:detailNav];

        KFBAppDelegate *appDelegate = (KFBAppDelegate *)[[UIApplication sharedApplication]delegate];
        appDelegate.splitViewController.viewControllers = details;
        appDelegate.window.rootViewController = self.splitViewController;
        appDelegate.splitViewController.delegate = detailViewController;
        [appDelegate.splitViewController viewWillAppear:YES];
    }