问题
I noticed some code example in Apple's documentation shows the following style when declaring the property:
@property (nonatomic, getter=isActivated) BOOL activated;
I understand it allows you to specify a certain name for your getter method. I'd like to know what is the reason and advantage to use this style.
Will I be able to use the dot notation to get the value (e.g. BOOL aBool = someObject.isActivated)? Or should I use[someObject isActivated];
to access the property? Thanks!
回答1:
No, the getter keyword only changes the method name. The idea is that you'll access the property just like a variable:
if (self.activated) { ... }
self.activated = YES;
But when you're sending a message to the object, it's readable code: if ([self isActivated]) { ... }.
回答2:
Kind of the latter. You don’t have to use the method—calling someObject.activated will still work—but it lets you improve the semantics of your class’s interface. A method called -activated could return the value of the ivar activated, or it could do something more esoteric (like activating the object); isActivated clearly returns a Boolean value for whether or not the object is “activated”.
来源：https://stackoverflow.com/questions/7210937/getter-keyword-in-property-declaration-in-objective-c