为什么initWithNibName不适用于我的UIViewController子类？ [英] Why doesn't initWithNibName work for my UIViewController subclass?

问题描述

我已经将UIViewController子类化为一个新类，PageViewController（我正在写一个简单的书应用程序）。我想添加一个从nib文件加载的新视图，并使用以下代码。它工作。

I have subclassed UIViewController into a new class, PageViewController (I'm writing a simple book app). I want to add a new view loaded from a nib file and am using the following code. It works.

PageViewController *viewController1 = [[UIViewController alloc] initWithNibName:@"Page1" bundle:nil];
[viewController1.view setUserInteractionEnabled:YES];
[self.view addSubview:viewController1.view];

但是，第一行是错误的，因为我应该在PageViewController上调用alloc。当我更正它（下面），代码编译，但xib文件不加载，视图只是透明。

However, the first line is wrong because I should be calling alloc on PageViewController. When I correct it (below), the code compiles but the xib file doesn't load and the view is just transparent.

    PageViewController *viewController1 = [[PageViewController alloc] initWithNibName:@"Page1" bundle:nil];
[viewController1.view setUserInteractionEnabled:YES];
[self.view addSubview:viewController1.view];

PageViewController initWithNibName方法已取消注释，只是默认值，设置self = [super initWithNibName：nibNameOrNil

The PageViewController initWithNibName method has been uncommented and is just the default, setting self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil].

我试过的：
在Page1 nib文件中，我试图在PageViewController和UIViewController之间更改File Owner类。是的，我记得以后将其连接到视图出口。

What I have tried: In the Page1 nib file, I have tried changing the File Owner class between PageViewController and UIViewController. Yes, I remembered to connect it back to the view outlet afterwards.

帮助，请！

推荐答案

您是否覆盖了PageViewController中的loadView方法？
如果你NSLog的viewController1.view？

Have you overridden the loadView method in PageViewController? What if you NSLog the viewController1.view?

确实，在Interface Builder中，你必须设置文件的所有者为PageViewController，并将其视图您在Interface Builder中的视图。

Indeed, in Interface Builder, you have to set the file's owner to PageViewController, and connect its view to the view you have in Interface Builder.

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