目标C：我的自定义-init方法不被调用 [英] Objective C: My custom -init method not getting called

问题描述

我有一个类，我从UIView派生，我想创建一个-init类，像这样：

   - （id）init 
 {
 if（self = [super init]）{
 //这里的初始化
} 
 return self;不幸的是，我知道一个事实，-init不会被调用。下面是我如何在我的.h中定义它：
   - （id）init; 
  
任何人都知道为什么它不被调用？ 
 
 
 
 ADDENDUM：
 
 
 
我发现当我将初始化放在initWithCoder中时， 
我添加了initWithFrame但是没有调用。
 
 
 
这是一个在IB中指定的对象。
 UIViewController 和 UIView 有两个指定的初始化程序。它们是从 nib 调用的 initWithCoder 和从调用的 initWithFrame 码。  Init 不是这些对象的指定初始化程序。
 
 
 
如果你想覆盖这两个基地，你可以做这是：
   - （void）initializationCodeMethod {
< #Initialization Code Here＃ 
} 
  - （id）initWithFrame：（CGRect）frame {
 if（（self = [super initWithFrame：frame]））{
 [self initializationCodeMethod]; 
} 
 return self; 
} 
  - （id）initWithCoder：（NSCoder *）aDecoder {
 if（（self = [super initWithCoder：aDecoder]））{
 [self initializationCodeMethod]; 
} 
 return self; 
} 
  
 
I have a class that I'm deriving from UIView, and I wanted to create a -init class for it like so:
- (id) init
{
    if (self = [super init]) {
        // my initializations here
    }
    return self;
}
Unfortunately I know for a fact that -init is not getting called. Here is how I define it in my .h:
-(id)init;
Anybody know why it's not getting called? 

ADDENDUM:

I found that when I put my initialization in initWithCoder, it is run just fine. 
I added initWithFrame but that wasn't called.

This is for an object that I specified in IB.
解决方案
There are two designated initializers for UIViewController and UIView they are initWithCoder called from nib, and initWithFrame called from code. Init is not the designated initializer for those objects.

If you want to cover both bases you can do something like this:
-(void)initializationCodeMethod{
    <#Initialization Code Here#>
}
-(id)initWithFrame:(CGRect)frame{
    if ((self = [super initWithFrame:frame])){
        [self initializationCodeMethod];
    }
    return self;
}
-(id)initWithCoder:(NSCoder *)aDecoder{
    if ((self = [super initWithCoder:aDecoder])){
        [self initializationCodeMethod];
    }
    return self;
}


                        
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