Question

I am trying to convert a project to use ARC.

I have a declared property like such:

@property (nonatomic, retain, setter=setSomeProperty:) SomeClass * someProperty;

A declaration of the setter method in the interface:

-(void)setSomeProperty:(SomeClass *)value;

And I have an implementation of the setter that looks like this:

-(void)setSomeProperty:(SomeClass *)value
{
    if (_value != value)
    {
         [_value release];
         _value = [value retain];
    }

    // Other things...
}

I’m getting an error when trying to use the “Convert to Objective-C ARC…” tool:

error: type of property ‘someProperty’ does not match type of accessor
‘setSomeProperty:’ [-Werror,3]

Answer 1

Remove the declaration of the setSomeProperty method from the interface. The @property creates a declaration and the default setter is the same as is declared.

-(void)setSomeProperty:(SomeClass *)value;