使用@property和@synthesize进行ivar隐式创建 [英] Using @property and @synthesize with ivar implicit creation

问题描述

好的，最近我得到了这个可能的坏习惯，用声明我的类属性@property 使用 @synthesize 并在我需要的任何地方使用它们作为 self.name 而不引用内部ivar（让 @synthesize 做它的工作）

Ok, so lately I got this presumable bad habit of declaring my class properties with @property create getters and setters with @synthesize and simply use them anywhere I need them as self.name without having a reference to the inner ivar (let @synthesize do its work)

现在，当然这不允许我访问内部的ivar（例如。 name _ ）但是从我到目前为止编码的内容来看，我并不是真的需要它。对于只读属性，我不使用 @synthesize ，而是自己实现getter。

Now, of course this doesn't allow me to access the inner ivar (eg. name_) but from what I've coded so far, I didn't really need it. For read-only properties I don't use @synthesize but implement the getter myself.

一切似乎都很好，但不知何故，我感觉这是不对的，因为我已经查看了所有开源库，也宣告了ivar并在整个代码中使用它。 @property + @synthesize 并且没有ivar它绝对是懒惰的选择，但有什么缺点？有人可以给我一些建议吗？

Everything seems fine, but somehow I've got the feeling that this is not right because all the open source libraries I've had a look over, also declared the ivar and used it throughout the code. @property + @synthesize and no ivar its definitely the lazy choice, but what are the drawbacks? Can someone give me some advice?

另外，我已经读过，作为一般建议，可以使用 self.propertyName 除了 dealloc 和 init 方法之外，你的类代码中的任何地方。但只要你确保对象是初始化：

Also, I've read that, as a general advice, it's OK to use self.propertyName anywhere in your class code except the dealloc and init methods. But as long as you make sure the object is initialize:

-(id) init
{
    if( (self=[super init] )) {

    }
    return self;
}

并在调用之前删除所有键值观察者[super dealloc] 一切都应该没问题。对吗？

and you remove all key-value observers before calling [super dealloc] everything should be fine. Right?

推荐答案

以及 @synthesize 将创建内部ivar与属性相同的名称：

well the @synthesize will create the inner ivar with the same name as the property:

@synthesize name;

- (void) dealloc {
   [name release], name  = nil;
   [super dealloc]
}

或者给内部ivar另一个名字：

Or give the inner ivar an other name:

@synthesize name = _name;

- (void) dealloc {
   [_name release], _name  = nil;
   [super dealloc]
}

我使用 self.name 在init中，但不在dealloc中，似乎工作得很好。

I use the self.name in the init but not in the dealloc and seems to work great.

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