在哪里初始化自定义UIView，在Interface Builder中实例化？ [英] Where to initialize custom UIView, instantiated in Interface Builder?

问题描述

我有一个UIView的子类，它在XIB文件中实例化。我需要它做一些初始化（设置一些变量和创建一个子视图）。

I have a subclass of UIView that's instantiated in a XIB file. I need it to do some initialization (settings some variables and creating a subview).

但是，我不总是通过Interface Builder实例化这个视图。我也是程序化。在这两种情况下，初始化需要相同。

However, I do not always instantiate this view via Interface Builder. I do it programmatically too. In both cases, the initialization needs to be the same.

我指定的初始化程序是 initWithValues：。

My designated initializer is initWithValues:.

问题是; 我在哪里执行初始化？

由于我必须在两个不同的位置执行，我想我需要在一个单独的 initialize 方法（或类似的方法），并从 initWithValues：调用

Since I have to perform it in 2 different locations, I figured I need to refactor it in a separate initialize method (or something like that), and call it from initWithValues:.

但是从IB加载时，会调用 initWithCoder：和 awakeFromNib 从哪个方法，我必须调用 initialize ？或者我必须从 initWithCoder：调用 initWithValues：，并且在 awakeFromNib ？

But when loading from IB, both initWithCoder: and awakeFromNib are called. From which method do I have to call initialize? Or do I have to call initWithValues: from initWithCoder: and do nothing in awakeFromNib?

推荐答案

您应该使用 initWithFrame：初始化视图（因为它是指定的初始化程序）。因此，如果你有 initWithValues：，请确保从它调用 initWithFrame：。

You should use initWithFrame: when initializing views (since it's the designated initializer). Hence, if you have initWithValues: make sure you call initWithFrame: from it.

这样应该可以初始化：;）

Something like this should work for initializing: ;)

- (void)initialize{
     //init your ivars here
}

- (id)initWithCoder:(NSCoder *)aCoder{
    if(self = [super initWithCoder:aCoder]){
        [self initialize];
    }
    return self;
}

- (id)initWithFrame:(CGRect)rect{
    if(self = [super initWithFrame:rect]){
        [self initialize];
    }
    return self;
}

我将要添加一个进一步的解释，但mplappert的答案很清楚。如有必要，使用 awakeFromNib 。

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