如何制作没有xib或storyboard vc标识符的视图控制器? [英] How to make a view controller without a xib or a storyboard vc identifier?

问题描述

我想知道如何在不使用 xib 或 storyboard 的情况下制作 viewcontroller.所以在这种情况下，我会得到 viewcontroller 这样的

I wanted to know how to make a viewcontroller without the use of xib or storyboard. So in this case, I would be getting the viewcontroller as such

   PopupViewController* vc = [[PopupViewController alloc] init];
    [self addChildViewController:vc];
    [self.view addSubview:vc.view];
    [vc didMoveToParentViewController:self];

我知道它必须通过覆盖 init 方法来做一些事情，因为我们没有使用 initWithCoder ?

I know it has to do something with overriding the init method since we are not using initWithCoder ?

我知道我必须创建一个视图并将其设置为 PopupViewController 的 self.view，但我想知道如何才能做到这一点.

I know I have to create a view and set it as the self.view for the PopupViewController, but I was wondering how I could do that.

是的，制作 xib 文件 或将 view controller 添加到 storyboard 可能要容易得多，这是为了深入了解视图控制器的工作原理.

Yes it may be much easier just to make an xib file or add a view controller to the storyboard, this is to understand deeply how view controllers work.

推荐答案

初始化视图的最佳位置是在 PopupViewController 的 loadView 方法中.类似的东西:

The best place to init the view is in PopupViewController's loadView method. Something like:

- (void)loadView {
   self.view = [MyViewClass new];
}

然后，在 MyViewClass initWithFrame: 方法中构建所有子视图并为其设置约束.如果您不使用约束，请覆盖 layoutSubviews 方法.

Then, in MyViewClass initWithFrame: method build all subviews and set constraints to it. If you're not using constraints, override layoutSubviews method.

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