我的 iOS 应用程序在初始屏幕后出现黑屏，但它显示状态栏.iOS SDK 5.1.

Question

我正在使用标签栏视图应用程序，并且正在使用情节提要，我的Xcode版本是4.3.3。基本上我的应用程序曾经加载正常，但后来我添加了第三个视图和第三个视图控制器，它无法正确加载，所以我删除了它们，现在它无法正确加载：/它会加载初始屏幕，但不会再进一步。

这是我的应用代表。

//
//  AppDelegate.h
//  Work App for Dad
//
//  Created by Alfie Hopkin on 17/06/2012.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate>
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) UIViewController *FirstViewController;
@end

和我的应用程序代表

//
//  AppDelegate.m
//  Work App for Dad
//
//  Created by Alfie Hopkin on 17/06/2012.
//  Copyright (c) 2012 __MyCompanyName__. All rights reserved.
//
#import "AppDelegate.h"
@implementation AppDelegate
@synthesize window = _window;
@synthesize FirstViewController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    return YES;
}
- (void)applicationDidFinishLaunching:(UIApplication *)application {    
    // Override point for customization after app launch    
    [_window addSubview:FirstViewController.view];
    [_window makeKeyAndVisible];
}
@end

Answer 1

您是否忘记在情节提要的身份检查器中为视图控制器设置自定义类？