启动屏幕：EXC_BAD_ACCESS在调用dismissModalViewControllerAnimated后延迟

Question

我想为我的应用程序使用模式视图控制器创建1-2秒的splashcreen但是当我尝试关闭视图时，我的应用程序崩溃，访问错误不正确。所以在我的应用程序委托我有：

- (BOOL) application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  
//create window and show it 
window = [[UIWindow alloc] initWithFrame:CGRectMake(0, 0, 320, 480)]; 
window.backgroundColor = [UIColor greenColor]; 
[window makeKeyAndVisible]; 


//create the main view controller and add its view to the window 
mainViewCtrl = [MainViewController alloc]; 
[window addSubview:mainViewCtrl.view]; 


//show splash screen 
UIImage *image  = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"default.png" ofType:nil]]; 
splashViewCtrl = [[UIViewController alloc] init]; 
splashViewCtrl.view = [[UIImageView alloc] initWithImage:image]; 
[mainViewCtrl presentModalViewController:splashViewCtrl animated:NO]; 

//setup callback to dismiss 
[self performSelector:@selector(hideSplash) withObject:nil afterDelay:2.0]; 

return(true); 
} 

//hide splash screen callback 
- (void)hideSplash { 
[[self mainViewCtrl] dismissModalViewControllerAnimated:YES]; 
} 

而这一切工作除了当hideSplash在2秒的应用程序崩溃与一个EXC_BAD_ACCESS后称为完美的罚款。如果我注释掉进行选择线后，像这样马上致电hidesplash：

[mainViewCtrl presentModalViewController:splashViewCtrl animated:NO]; 

[self hideSplash]; 

模态视图正确关闭。我确信这是一个内存管理问题，但我不确定我在这里做错了什么。有没有人有任何想法，这可能是什么或如何正确调试，所以我可以推迟解雇？

感谢

Answer 1

这看起来奇怪：

mainViewCtrl = [MainViewController alloc]; 

尝试添加初始化调用它。

Answer 2

//show splash screen 
UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"default.png" ofType:nil]]; 
splashViewCtrl = [[UIViewController alloc] init]; 
splashViewCtrl.view = [[UIImageView alloc] initWithImage:image]; 
[mainViewCtrl presentModalViewController:splashViewCtrl animated:NO]; 

更改上述这下面：

//show splash screen 
UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"default.png" ofType:nil]]; 
splashViewCtrl = [[UIViewController alloc] init]; 
splashViewCtrl.view = [[UIImageView alloc] initWithImage:image]; 
[mainViewCtrl presentModalViewController:splashViewCtrl animated:NO]; 
[mainViewCtrl release]; //Add this line !!!!