EXC_BAD_ACCESS（code = 1）錯誤的主從應用程序

當我更改詳細視圖時，我的iPad應用程序崩潰。我設置了一個異常斷點來查明導致問題的代碼行。它似乎發生得相當零星，所以我不確定發生了什麼事情。有什麼建議麼？在我的主視圖控制器EXC_BAD_ACCESS（code = 1）錯誤的主從應用程序

self.splitViewController.viewControllers = details;

我didSelectRowAtIndexPath方法方法

- (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; 
    }

這也是另一種觀點認爲在這裏做的：

例如，墜毀在這一行

appDelegate.splitViewController.viewControllers = details;

以下是該選項的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]); 
}

編輯：應用程序似乎當我在主視圖控制器表視圖選擇第一行，以顯示初始細節視圖然後選擇另一行顯示不同的內容崩潰。如果我不在任何時候選擇第一行，一切正常。

來源

2013-08-05 raginggoat

爲什麼要將窗口的根視圖控制器設置爲分割視圖控制器？它不是已經是根視圖控制器嗎？ – rdelmar

您可能會發現這有助於調試EXC_BAD_ACCESS錯誤，因爲我有時會這樣做。它的要點是在調試器中使用'register read'命令並查看寄存器以確定崩潰之前調用的最後一個函數。從中你可以確定你正在嘗試使用該功能的對象。而且一旦你知道哪個交易對象正在被訪問，你可以想出如何安全地調用它或者以某種方式保留它。 http://sealiesoftware.com/blog/archive/2008/09/22/objc_explain_So_you_crashed_in_objc_msgSend.html – jmathew

你可能還需要這個http://lldb.llvm.org/lldb-gdb.html我發佈的鏈接。 – jmathew

我設法通過調整在主視圖中點擊第一行時如何顯示初始詳細視圖來解決問題。

您可以在我的原始文章中看到原始實施。這是我如何改變它。

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]; 
    }

來源

2013-08-06 13:12:37 raginggoat

EXC_BAD_ACCESS（code = 1）錯誤的主從應用程序

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