Objective-C是@synthesize必需还是可选的？ [英] Objective-C is @synthesize required or optional?

问题描述

抱歉，我是一名新手iOS开发人员，最近我简要地听说@synthesize现在是某个版本的Xcode中的@synthesize，并且编译器会自动合成和属性并将_分配给私有变量。

我已经测试了这个：

没有@synthesize，你可以使用

访问属性和私有字段

  self.property_name = something; 
 _property_name =某事; //（用于getter和setter）
  

使用@synthesize property_name，可以访问属性和私有字段使用

  self.property_name = something; 
 property_name = something; 
  

我的问题是我们真的需要@synthesize吗？还是有一个我错过的更大的故事？

解决方案

从Xcode 4.4开始，我们不需要这样做，它添加了一个名为默认合成属性的功能。

简单地说，它会自动生成：

  @synthesize name = _name; 
  

sorry I'm a newbie iOS developer, recently I've briefly heard that @synthesize is now @synthesize in a certain version of Xcode and that the compiler will auto synthesize and properties and assign _ to private variables.

I've tested this:

with out @synthesize, you can access properties and private field using

self.property_name = something;
_property_name = something; //(used in getter and setters)

with @synthesize property_name, you can access properties and private field using

self.property_name = something;
property_name = something;

My question is do we really need @synthesize anymore? or there is a bigger story I'm missing?

解决方案

No we don't need to do that as of Xcode 4.4, which added a feature called Default Synthesis Of Properties.

Simply put, it generates this automatically:

@synthesize name = _name;

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