UIViewController与Nib文件和继承 [英] UIViewController with Nib File and Inheritance

问题描述

我正在尝试做一些非常棘手的事情，而且我仍然陷入困境。我正在尝试使用从其他 UIViewController 继承的Nib文件和其他Nib文件来实例 UIViewController 。 br>
问题是我实例化我的儿子 UIViewController 。

I'm trying to do something really tricky and I'm still stuck at a point. I'm attempting to instance an UIViewController with a Nib file inherited from an other UIViewController with an other Nib file.
The problem is when I instantiate my son UIViewController .

// SonViewController
- (id)initWithNibName:(NSString *)nibNameOrNil 
                bundle:(NSBundle *)nibBundleOrNil
{
    if ((self = [super initWithNibName:nibNameOrNil 
                                bundle:nibBundleOrNil])) {
        // Custom initialization.
    }
    return self;
}

init方法 initWithNibName：bundle：应该调用超类，但它只调用自己的nib文件。在超类中，我试图覆盖 initWithNibName：bundle：方法并自己放置nibName：

The init method initWithNibName:bundle: should call the super class but it only call its own nib file. In the super class, I tried to override the initWithNibName:bundle: method and put the nibName myself like that :

// MotherViewController
- (id)initWithNibName:(NSString *)nibNameOrNil 
               bundle:(NSBundle *)nibBundleOrNil
{
    if ((self = [super initWithNibName:@"MotherViewController" 
                                bundle:nibBundleOrNil])) {
        // Custom initialization.
    }
    return self;
}

它只是初始化并显示 Mother Class 及其IB对象。我理解为什么，但我开始认为不可能做我想做的事。有什么建议吗？

It only init and display the Mother Class and its IB Object. I understand why but I begin thinking it is impossible to do what I want. Any suggestion ?

编辑：

我会像这样使用我的SonViewController：

I would use my SonViewController just like that :

SonViewController *son = [[SonViewController alloc] 
                      initWithNibName:@"SonViewController" bundle:[NSBundle mainBundle]];

[self.navigationController pushViewController:son animated:YES];
[son release];

它应显示儿子和母亲IB对象......

It should display son and mother IB Object...

问候，

kl94

Regards,
kl94

推荐答案

我知道这是一个老线程，但我刚刚发现了一篇令人难以置信的博客文章这里。

I know this is an old thread, but I just found an incredibly blog post here.

基本上，您必须遍历父类的所有视图，并将它们作为子视图添加到子类中。以下是我在项目中实现它的方法：

Essentially, you have to iterate through all the views of the parent class and add them as subviews to your child class. Here's how I implemented it in my project:

// ChildViewController.m
- (void)viewDidLoad
{
    [super viewDidLoad];
    [self addSubviewsFromSuperclass];  
}

// ParentViewController.h
- (void)addSubviewsFromSuperclass;   

// ParentViewController.m
- (void)addSubviewsFromSuperclass
{
    UIView *selfView = self.view;
    UIView *nibView = nil;
    @try
    {
        nibView = [NSBundle.mainBundle loadNibNamed:NSStringFromClass([self superclass]) owner:self options:nil][0];
    }
    @catch (NSException *exception)
    {
        NSLog(@"Something exceptional happened while loading nib:\n%@", exception);
    }
    self.view = selfView;
    for (UIView *view in nibView.subviews)
    {
        [self.view addSubview:view];
    }
}

addSuviewsFromSuperclass 方法是不是我的编码。我必须完全赞赏我上面提到的博客文章的作者。下载他的示例项目，你会在他的JMViewController.m中找到它。

That addSuviewsFromSuperclass method is not my coding. I have to give full credit to the author of the blogpost I mentioned above. Download his example project and you'll find it in his JMViewController.m.

这篇关于UIViewController与Nib文件和继承的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！