Objective c PopoverController-释放实例

当我单击splitviewcontroller中的popover按钮时，我收到消息：message sent to deallocated instance 0x6a66ca0

我已经发现这个实例必须是我分配和初始化的detailviewcontroller。到现在为止，一直都还不错。但当整个事情都不起作用时，我看不出有什么问题

首先是创建Splitview的AppDelegate：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{

    // TestViews for SplitViewController 
    // TestView1 *test1 = [[TestView1 alloc] initWithNibName:@"TestView1" bundle:nil];

    // TableView as RootViewController for the Left Hand Pane
    RootViewTableViewController *rootViewTableViewController = [[RootViewTableViewController alloc] initWithNibName:@"RootViewTableView" bundle:nil];
    UINavigationController *rootNavigationController = [[UINavigationController alloc] initWithRootViewController:rootViewTableViewController];

    DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:nil];
    UINavigationController *detailNavigationController = [[UINavigationController alloc] initWithRootViewController:detailViewController];

    self.splitViewController = [[UISplitViewController alloc] init];
    self.splitViewController.delegate = detailViewController;
    self.splitViewController.viewControllers = [NSArray arrayWithObjects:rootNavigationController,detailNavigationController, nil];
    self.window.rootViewController = self.splitViewController;

    [self.window makeKeyAndVisible];
    return YES;
}

首先，我认为代码行self.splitviewcontroller.delegate=detailviewcontroller；可能是问题。。。。。但整个应用程序启动得非常完美。仅当我单击按钮时，此问题才会出现

RootViewController就是这样，为了清晰起见，我省略了标准的tableview委托方法

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {

        // Set Title of the TableView for the RootViewController
        self.title = @"Notarzteinsatzprotokoll";
        self.clearsSelectionOnViewWillAppear = NO;
        self.contentSizeForViewInPopover = CGSizeMake(320.0, 600.0);
    }
    NSLog(@"INIT %p", self);
    return self;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    [self.tableView selectRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0] animated:NO scrollPosition:UITableViewScrollPositionMiddle];
}

和详图视图控制器：

#pragma mark -
#pragma mark Managing the Detail Item

- (void)setDetailItem:(id)newDetailItem
{
    if (_detailItem != newDetailItem) {
        _detailItem = newDetailItem;

        // Update the view
        [self configureView];
    }

    if (self.rootPopoverController != nil) {
        [self.rootPopoverController dismissPopoverAnimated:YES];
    }
}

- (void)configureView
{
    // Update the user interface for the detail item

    if (self.detailItem) {
        self.detailDescriptionLabel.text = [self.detailItem description];
    }
}


- (void)viewDidLoad {
    [super viewDidLoad];
    [self setTitle:@"Notarzteinsatzprotokoll"];
    [self configureView];
}

#pragma mark -
#pragma mark Rotation Support

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation {
    return YES;
}


#pragma mark -
#pragma mark SplitView

- (void)splitViewController:(UISplitViewController *)svc willHideViewController:(UIViewController *)aViewController withBarButtonItem:(UIBarButtonItem *)barButtonItem forPopoverController:(UIPopoverController *)pc {
    barButtonItem.title = @"Master";
    [self.navigationItem setLeftBarButtonItem:barButtonItem animated:YES];
    self.rootPopoverController = pc;
}

- (void)splitViewController:(UISplitViewController *)svc willShowViewController:(UIViewController *)aViewController invalidatingBarButtonItem:(UIBarButtonItem *)barButtonItem {
    [self.navigationItem setLeftBarButtonItem:nil animated:YES];
    self.rootPopoverController = nil;
}

我看不到程序流程中释放detailviewcontroller对象和其他东西试图发送消息的点。。。我必须交换一些代码行吗

谢谢大家!！ 塞巴斯蒂安

@end

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该错误应该告诉您将向解除分配的实例发送什么消息。不确定到底是什么问题，是否是一个setTitle:消息被发送到左栏按钮项

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在splitViewController:willShowViewController:中，您将左栏按钮项设置为nil，这将解除锁定它；在splitViewController:willHideViewController:中，您尝试更改其标题，这可能是您的问题。

我建议在每一行相关代码处设置断点，并尝试确定导致错误消息的确切代码部分。然后，当你发现这个区域时，通过这些线，找到问题的确切根源。我相信你最终会找到解决问题的正确方法。妥善处理。问题解决了。嗯。。。我不认为这可能是splitView委派消息。。。因为它们只能根据设备的旋转顺序依次调用。因此，我必须将其设置为零或构建一个。