[objective-c] Using a BOOL property

Apple recommends to declare a BOOL property this way:

@property (nonatomic, assign, getter=isWorking) BOOL working;

As I'm using Objective-C 2.0 properties and dot notation, I access this property using self.working. I know that I could also use [self isWorking] — but I don't have to.

So, as I'm using dot notation everywhere, why should I define an extra property? Would it be okay to simply write

@property (nonatomic, assign) BOOL working;

Or do I have any benefits writing getter=isWorking in my case (usage of dot notation)?

Thanks!

This question is related to objective-c ios properties

The answer is


Apple recommends for stylistic purposes.If you write this code:

@property (nonatomic,assign) BOOL working;

Then you can not use [object isWorking].
It will show an error. But if you use below code means

@property (assign,getter=isWorking) BOOL working;

So you can use [object isWorking] .


There's no benefit to using properties with primitive types. @property is used with heap allocated NSObjects like NSString*, NSNumber*, UIButton*, and etc, because memory managed accessors are created for free. When you create a BOOL, the value is always allocated on the stack and does not require any special accessors to prevent memory leakage. isWorking is simply the popular way of expressing the state of a boolean value.

In another OO language you would make a variable private bool working; and two accessors: SetWorking for the setter and IsWorking for the accessor.


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