ios – 如果要使用主要的故事板文件,应用程序委托必须实现该窗口属性

我以编程方式实现列表视图控制器
当我尝试运行该项目时,我有错误：

2012-11-07 22:46:34.719 myTableViewControl[12021:c07] The app delegate must implement the         window property if it wants to use a main storyboard file.
2012-11-07 22:46:34.722 myTableViewControl[12021:c07] -[AppDelegate setWindow:]:     unrecognized selector sent to instance 0x7674e70
2012-11-07 22:46:34.723 myTableViewControl[12021:c07] *** Terminating app due to uncaught     exception 'NSInvalidArgumentException',reason: '-[AppDelegate setWindow:]: unrecognized     selector sent to instance 0x7674e70'
*** First throw call stack:
(0x1c8e012 0x10cbe7e 0x1d194bd 0x10df7ea 0x1c7dcf9 0x1c7d94e 0x1d60 0x107b7 0x10da7     0x11fab 0x23315 0x2424b 0x15cf8 0x1be9df9 0x1be9ad0 0x1c03bf5 0x1c03962 0x1c34bb6 0x1c33f44     0x1c33e1b 0x117da 0x1365c 0x1bd2 0x1b05)
libc++abi.dylib: terminate called throwing an exception
(lldb)

当我运行代码时,它挂在main.m上,并显示“thread1：signal SIGABRT”

@autoreleasepool {return UIApplicationMain(argc,argv,nil,NSStringFromClass([AppDelegate class]));

我的代码如下：
AppDelegate.h

//
//  AppDelegate.h
//  myTableViewControl
//
//  Created by Max on 12-11-5.
//  Copyright (c) 2012年 Max. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong,nonatomic) UINavigationController *navigationController;


@end

AppDelegate.m

//
//  AppDelegate.m
//  myTableViewControl
//
//  Created by Max on 12-11-5.
//  Copyright (c) 2012年 Max. All rights reserved.
//

    #import "AppDelegate.h"
    #import "firstViewController.h"


@implementation AppDelegate
@synthesize navigationController;


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:    (NSDictionary *)launchOptions
{
    // create the base window
    UIWindow *window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    window.backgroundColor = [UIColor greenColor];
    self.window = window;

    [window release];

    // this is the home page from the user's perspective

    FirstViewController *fvc = [[FirstViewController alloc] init];

    UINavigationController *nc = [[UINavigationController alloc]initWithRootViewController:fvc];
    self.navigationController = nc;

    [fvc release];
    [nc release];

    // show them
    [self.window addSubview: nc.view];
    [self.window makeKeyAndVisible];


    return YES;
}

- (void) dealloc
{

    [super dealloc];
}

- (void)applicationWillResignActive:(UIApplication *)application
{
    // Sent when the application is about to move from active to inactive state. This can occur for certain types of temporary interruptions (such as an incoming phone call or SMS message) or when the user quits the application and it begins the transition to the background state.
    // Use this method to pause ongoing tasks,disable timers,and throttle down OpenGL ES frame rates. Games should use this method to pause the game.
}

- (void)applicationDidEnterBackground:(UIApplication *)application
{
    // Use this method to release shared resources,save user data,invalidate timers,and store enough application state information to restore your application to its current state in case it is terminated later. 
    // If your application supports background execution,this method is called instead of applicationWillTerminate: when the user quits.
}

- (void)applicationWillEnterForeground:(UIApplication *)application
{
    // Called as part of the transition from the background to the inactive state; here you can undo many of the changes made on entering the background.
}

- (void)applicationDidBecomeActive:(UIApplication *)application
{
    // Restart any tasks that were paused (or not yet started) while the application was inactive. If the application was previously in the background,optionally refresh the user interface.
}

- (void)applicationWillTerminate:(UIApplication *)application
{
    // Called when the application is about to terminate. Save data if appropriate. See also applicationDidEnterBackground:.
}

@end

FirstViewController是列表视图控制器.

解决方法

您正在将窗口创建为局部变量,然后尝试通过使用self.window来访问它,就像它是一个属性一样.使它成为一个财产.