Objective-C:标量属性的默认值是atomic吗? [英] Objective-C: Defaults to atomic for scalar properties?
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问题描述
一个朋友告诉我，标量属性(BOOL，NSInteger等)的@property默认值是非原子的.即
A friend told me that the @property default for scalar properties (BOOL, NSInteger, etc.) is nonatomic. I.e.,
@property BOOL followVenmo;
默认为
@property (nonatomic) BOOL followVenmo;
但是，我总是对默认值始终是原子的，标量的或非原子的印象始终如此.
But, I was always under the impression that the default is always atomic, scalar or not.
是哪个?
推荐答案
基于我对其他几个相关问题的研究:
Based on my research of a couple other related questions:
- Objective-c properties for primitive types
- Does atomic actually mean anything for a synthesized primitive?
我将遵守 @Rhubarb的建议:
根据经验，如果您不需要多线程支持-如果您使用的是UIViewControllers这样的UI代码，则通常不需要多线程支持，只需声明所有这些都是非原子的即可.
As a rule of thumb, if you don't need multithreaded support - which you generally don't if you're working in UI code like UIViewControllers, then just declare it all nonatomic.
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