为什么我不能将新视图控制器推送到当前视图？ [英] Why can't I push a new view controller onto the current view?

问题描述

我使用以下代码并收到以下错误：

I am using the following code and getting the following errors:

编辑：参见这个如果您无法阅读上面的图片！

See this if you cannot read the image above!

ChangePasscode目前被宣布为一个类，是一个类使用.h和.m文件以及.nib文件查看控制器。

The "ChangePasscode" is currently declared as a class and is a view controller with .h and .m files along with a .nib file.

为什么会出现这些问题，我该怎么做才能修复它们？

Why are these issues happening, what can I do to fix them?

谢谢！

推荐答案

我要说你没有导入<您当前文件中的code> ChangePasscode.h 。

更新：以回应评论主题，如果要推送视图控制器，则需要实际创建导航结构。 iOS 5中的首选方式如下：

Update: In response to comment thread below, you'll need to actually create a nav structure if you want to push view controllers. The preferred way in iOS 5 is as follows:

// AppDelegate.h
// …Other existing code
@property (nonatomic, retain) UINavigationController *navController;
@end

// AppDelegate.m
@synthesize navController;
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
  navController = [[UINavigationController alloc] initWithRootViewController:viewController];
  self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
  self.window.rootViewController = navController;
  self.window.backgroundColor = [UIColor whiteColor];
  [self.window makeKeyAndVisible];
  return YES;
}

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