Objective c 将UINavigationController添加到窗口时,EXC\u访问错误
我正在使用多个视图控制器和导航控制器开发一个应用程序。当应用程序运行并执行以下代码时,它在尝试添加子视图时抛出异常Objective c 将UINavigationController添加到窗口时,EXC\u访问错误,objective-c,cocoa-touch,ios,uiviewcontroller,uinavigationcontroller,Objective C,Cocoa Touch,Ios,Uiviewcontroller,Uinavigationcontroller,我正在使用多个视图控制器和导航控制器开发一个应用程序。当应用程序运行并执行以下代码时,它在尝试添加子视图时抛出异常 - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [self.window addSubview:[navigationController view]]; [self.window makeKe
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self.window addSubview:[navigationController view]];
[self.window makeKeyAndVisible];
}
我声明导航控制器如下:
@interface SimpleContactsAppDelegate : NSObject <UIApplicationDelegate> {
NSManagedObjectModel *managedObjectModel;
NSManagedObjectContext *managedObjectContext;
NSPersistentStoreCoordinator *persistentStoreCoordinator;
UIWindow *window;
UINavigationController *navigationController;
// view for adding new contacts
UIViewController *newContactView;
UIButton *addButton;
// controls for the addContactView
UIButton *saveContactButton;
UITextField *nameField;
UITextField *emailField;
UITextField *phoneField;
UITableView *contactsTable;
}
@property (nonatomic, retain, readonly) NSManagedObjectModel *managedObjectModel;
@property (nonatomic, retain, readonly) NSManagedObjectContext *managedObjectContext;
@property (nonatomic, retain, readonly) NSPersistentStoreCoordinator *persistentStoreCoordinator;
@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UINavigationController *navigationController;
@property (nonatomic, retain) IBOutlet UIButton *addButton;
@property (nonatomic, retain) IBOutlet UITableView *contactsTable;
// controller and fields for the form
@property (nonatomic, retain) IBOutlet UIViewController *newContactView;
@property (nonatomic, retain) IBOutlet UITextField *nameField;
@property (nonatomic, retain) IBOutlet UITextField *emailField;
@property (nonatomic, retain) IBOutlet UITextField *phoneField;
@property (nonatomic, retain) IBOutlet UIButton *saveContactButton;
@接口SimpleContactsAppDelegate:NSObject{
NSManagedObjectModel*managedObjectModel;
NSManagedObjectContext*managedObjectContext;
NSPersistentStoreCoordinator*persistentStoreCoordinator;
UIWindow*窗口;
UINavigationController*导航控制器;
//添加新联系人的视图
UIViewController*newContactView;
UIButton*添加按钮;
//addContactView的控件
UIButton*saveContactButton;
UITextField*nameField;
UITextField*emailField;
UITextField*phoneField;
UITableView*contactsTable;
}
@属性(非原子、保留、只读)NSManagedObjectModel*managedObjectModel;
@属性(非原子、保留、只读)NSManagedObjectContext*managedObjectContext;
@属性(非原子、保留、只读)NSPersistentStoreCoordinator*persistentStoreCoordinator;
@属性(非原子,保留)IBUIWindow*window;
@属性(非原子,保留)IBuinavigationController*导航控制器;
@属性(非原子,保留)IBUIButton*addButton;
@属性(非原子,保留)IBUITableView*contactsTable;
//窗体的控制器和字段
@属性(非原子,保留)IBUIViewController*newContactView;
@属性(非原子,保留)IBOutlet UITextField*nameField;
@属性(非原子,保留)IBOutlet UITextField*emailField;
@属性(非原子,保留)IBOutlet UITextField*phoneField;
@属性(非原子,保留)IBUIButton*saveContactButton;
我已将导航控制器连接到XIB中的委托对象。请随意查看我的完整来源:
我试过使用NSZombie的仪器,但它似乎没有停止,让我检查出了什么特别的问题。它有时也会继续运行,不会终止。我最终不得不使用active terminal强制退出它。首先,您声明了一个属性,但通过其实例变量而不是使用该属性来访问UINavigationController 使用以下命令:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self.window addSubview:[self.navigationController view]];
[self.window makeKeyAndVisible];
return YES;
}
其次,您将主nib文件的名称更改为“Window.xib”。您必须将其更改回“MainWindow.xib”,或者必须编辑SimpleContacts-Info.plist并将“Main nib file base name”的值更改为“Window”。首先,您声明了一个属性,但通过其实例变量而不是使用该属性来访问UINavigationController 使用以下命令:
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
[self.window addSubview:[self.navigationController view]];
[self.window makeKeyAndVisible];
return YES;
}
其次,您将主nib文件的名称更改为“Window.xib”。您必须将其更改回“MainWindow.xib”,或者必须编辑SimpleContacts-Info.plist并将“Main nib file base name”的值更改为“Window”。非常感谢!!!:那就把它修好了。重命名文件,并将self添加到navigationController。非常感谢!!!:那就把它修好了。重命名该文件,并将self添加到navigationController。