Do you need to release an @property?

Do you need to @property (nonatomic, assign) int var开发者_如何学Ciable; in the .m file? If not, is there a reason why you don't need to release it?

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Yes, there's a good reason not to release it - it's not an object. And you should use @synthesize in your implementation (.m), and @property in your interface (.h).

Apple's The Objective-C Programming Language is a great place to find answers to questions like this.

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You need to release only those variable that you allocated or used.