How to declare a double pointer property in Objective-C?

Question

I have a function declared as follows:

- (void)loadWithCompletion:(MyCompletion)completion error:(NSError**)error;

The function takes a double pointer to an NSError, so I can report errors to the caller. Termination (and possibly an error) will occur some time after the function is called. I need to keep NSError ** as a property so that I can use it when the specified time passes.

@property(nonatomic, assign) NSError** error;

This property declaration gives me an error:

Pointer to a non-const type NSError * without explicit ownership.

Answer 1

add __autoreleasingbetween **to giveNSError*__autoreleasing* error

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