合成的目的

问题描述

我正在使用iOS5书来学习iOS编程。

I am using an iOS5 book to learn iOS programming.

@synthesize coolWord;

^ synthesize用于.m文件中的所有属性

^synthesize is used for all properties in .m files

我听说在iOS6中不需要合成，因为它是自动完成的。这是真的吗？

I heard that in iOS6 there is no need for synthesize, since it is automatically done for you. Is this true?

合成是否会为iOS6扮演任何角色？

Does synthesize play any role for iOS6?

感谢您的澄清。 ：）

推荐答案

在objective-c中的@synthesize只实现属性设置器和getter：

@synthesize in objective-c just implements property setters and getters:

- (void)setCoolWord:(NSString *)coolWord {
     _coolWord = coolWord;
}

- (NSString *)coolWord {
    return _coolWord;
}

Xcode 4的确适用于此（iOS6需要Xcode） 4）。从技术上讲，它实现了 @synthesize coolWord = _coolWord （ _coolWord 是实例变量而 coolWord 是属性）。

It is true with Xcode 4 that this is implemented for you (iOS6 requires Xcode 4). Technically it implements @synthesize coolWord = _coolWord (_coolWord is the instance variable and coolWord is the property).

要访问这些属性，请使用 self.coolWord 进行设置 self.coolWord = @YEAH！; 并获得 NSLog（@％@，self.coolWord）;

To access these properties use self.coolWord both for setting self.coolWord = @"YEAH!"; and getting NSLog(@"%@", self.coolWord);

另请注意，setter和getter仍然可以手动实现。如果你同时实现了setter和getter，你还需要手动包含 @synthesize coolWord = _coolWord; （不知道为什么会这样）。

Also note, both the setter and getter can still be manually implemented. If you implement BOTH the setter and getter though you NEED to also manually include @synthesize coolWord = _coolWord; (no idea why this is).

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