我不知道为什么我的视图被冻结

Question

我有一个很大的问题，因为几天我无法解决。

首先，我有这个代码登录视图控制器：

@implementation MMConnectionViewController 
@synthesize login, password, activityIndicator, mainVC; 


- (BOOL)textFieldShouldReturn:(UITextField *)aTextField 
{ 
[aTextField resignFirstResponder]; 

[self performSelectorOnMainThread:@selector(startRolling) withObject:nil waitUntilDone:NO]; 

[NSThread detachNewThreadSelector:@selector(connect) toTarget:self withObject:nil]; 

return YES; 
} 


- (void)viewWillAppear:(BOOL)flag { 
    [super viewWillAppear:flag]; 
    [login becomeFirstResponder]; 
login.keyboardAppearance = UIKeyboardAppearanceAlert; 
password.keyboardAppearance = UIKeyboardAppearanceAlert; 
[self setTitle:@"Monaco Marine"]; 
UIBarButtonItem *backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Logout" 
        style:UIBarButtonItemStyleBordered 
        target:nil 
        action:nil]; 
self.navigationItem.backBarButtonItem = backBarButtonItem; 
[[UIApplication sharedApplication] setStatusBarStyle: UIStatusBarStyleBlackOpaque]; 
[backBarButtonItem release]; 
} 

- (void)connect { 

NSAutoreleasePool * pool = [[NSAutoreleasePool alloc] init]; 

mainVC = [[MMMainViewController alloc] initWithLogin:login.text password:password.text connectPass:@"1" navigationController:self.navigationController nibName:@"MMMainViewController" bundle:nil]; 


if (mainVC) { 
    [self performSelectorOnMainThread:@selector(dataLoadingFinished) withObject:nil waitUntilDone:YES]; 
} 

[pool release]; 
} 

- (void)dataLoadingFinished { 
self.stopRolling; 
[self.navigationController pushViewController:mainVC animated:YES]; 
} 

- (void)showAlertWithMessage:(NSString *)message { 
self.stopRolling; 
NSLog(@"%@",message); 
UIAlertView *warning = [[UIAlertView alloc] initWithTitle:@"Connection Failed" message:[NSString stringWithFormat:@"%@",message] delegate:self cancelButtonTitle:@"Retry" otherButtonTitles:nil]; 
[warning show]; 
[warning release]; 
} 

- (void)startRolling { 
[activityIndicator startAnimating]; 
} 

- (void)stopRolling { 
[activityIndicator stopAnimating]; 
} 


- (void)viewDidLoad { 
[login becomeFirstResponder]; 
} 

- (void)dealloc { 
[login release],login=nil; 
[password release],password=nil; 
[activityIndicator release],activityIndicator=nil; 
    [super dealloc]; 
} 

后，有MMMainViewController与此代码：

@implementation MMMainViewController 
@synthesize login, password, connectPass, navigationController, accountVC; 


- (void)viewDidLoad { 

// Set a title for each view controller. These will also be names of each tab 
accountVC.title = @"Account"; 

accountVC.tabBarItem.image = [UIImage imageNamed:@"icon_user.png"]; 

self.view.frame = CGRectMake(0, 0, 320, 480); 

// Set each tab to show an appropriate view controller 
[self setViewControllers: 
    [NSArray arrayWithObjects:accountVC, nil]]; 

[navigationController setNavigationBarHidden:NO animated:NO]; 

UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:@"Menu" 
        style:UIBarButtonItemStyleBordered 
        target:nil 
        action:nil]; 
self.navigationItem.backBarButtonItem = backButton; 

[backButton release]; 


[self setTitle:@"Menu"]; 

} 



// The designated initializer. Override if you create the controller programmatically and want to perform customization that is not appropriate for viewDidLoad. 
- (id)initWithLogin:(NSString *)l password:(NSString *)p connectPass:(NSString *)c navigationController:(UINavigationController *)navController nibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil { 

UIView *contentView = [[UIView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]]; 
contentView.backgroundColor = [UIColor whiteColor]; 
self.view = contentView; 
[contentView release]; 

login = l; 
password = p; 
connectPass = c; 
navigationController = navController; 

if (!accountVC) 
    accountVC = [MMAccountViewController alloc]; 

[self.accountVC 
    initWithNibName:@"MMAccountViewController" bundle:nil]; 

self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil]; 
return self; 


} 

- (void)dealloc { 
[connectPass release]; 
[login release]; 
[password release]; 
    [super dealloc]; 
} 

从MMMainViewController加载的层MMAccountViewController是什么也没有一个基本的视图控制器在里面。

---

现在的问题是，有时当加载我标签视图控制器和I返回到登录视图控制器，画面冻结和错误与消息（NSZombieEnabled = YES）：

*** -[CALayer retain]: message sent to deallocated instance 0xd0199d0 

这是我的全部，我真的不知道我错在哪里。

一些更多的想法？

感谢那些帮助我的人！

Answer 1

你正在过度放松某处。您可能希望在Instruments中运行应用程序以检查它可能发生的位置（XCode：运行 - >使用性能工具运行 - >泄漏会为您提供您需要afaik的设置）。我在代码中看不到任何东西，但是你自己说你自己使用了“粗略”的代码，所以它可能不在你的程序的这一部分。

更新： 我仍然无法看到你在某处过分地发布了某些东西......我敢肯定，这个问题不在代码的这一部分。如果你还没有发现问题，你可能想尝试创建一个测试用例，也就是一个试图模仿这个程序行为并重现错误的小程序。如果你可以在一个小程序中重现它，我会看看这个。

Answer 2

我也遇到了同样的问题，问题是我分配一个UIButton到rightNavigationItem并释放该按钮实例，我只是删除发布代码，并开始工作。