Question

我创建了i navigationController项目名称：autoload，然后创建两个uiviewContorller命名为：second，three

我希望该进程在方法“viewDidLoad”中加载rootView加载第二个然后在方法“viewdidload”中自动加载三个，这是代码：

rootView：

- (void)viewDidLoad {
    self.title = @"first";
    Second *second = [[Second alloc] init];
    AutoLoadAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
    [delegate.navigationController pushViewController:second animated:YES];
    [super viewDidLoad];
}

第二

- (void)viewDidLoad {
    self.title = @"second";
    [super viewDidLoad];
}

现在建立一个去程序，我可以自动加载到第二个非常正确包括标题内容和导航按钮

然后我想要aotoload三秒钟，所以在第二种方法中添加代码：“viewdidload”

第二

- (void)viewDidLoad {
    self.title = @"second";
    **Three *three = [[Three alloc] init];
    AutoLoadAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
    [delegate.navigationController pushViewController:three animated:YES];**
    [super viewDidLoad];
}

最后将标题添加到三个：

3：

- (void)viewDidLoad {
    self.title = @"three";
    [super viewDidLoad];
}

然后构建并去，你会发现内容是正确的“三” 但标题错了“第二”，应该是“三” 并且您还会发现导航按钮错误

我的错误是什么，我应该怎么做才能将自动加载程序实现为三个？

请注意：

我试试：如果我在第二个添加按钮并移动代码

Three *three = [[Three alloc] init];
    AutoLoadAppDelegate *delegate = [[UIApplication sharedApplication] delegate];
    [delegate.navigationController pushViewController:three animated:YES];

到ibaction，它将正常工作，但我希望它自动加载

Answer 1

尝试在applicationDidFinishLaunching方法中设置viewControllers数组，而不是在viewDidLoad方法中调用pushViewController：

- (void)applicationDidFinishLaunching:(UIApplication *)application {    

    RootViewController *root = [[RootViewController alloc] init];
    root.title = @"root";
    Second *second = [[Second alloc] init];
    second.title = @"second";
    Three *three = [[Three alloc] init];
    three.title = @"three";
    [navigationController setViewControllers:[NSArray arrayWithObjects:root,second,three,nil] animated:YES];
    [root release];
    [second release];
    [three release];

    [window addSubview:[navigationController view]];
    [window makeKeyAndVisible];
}

iphone navigationController自动加载到三个级别

1 个答案: