Question

The example is that I would like to generate a warning each time the property -[UIViewController navigationController] is accessed.

For the curious, the reason is that I am using a custom Navigation Controller, and would like to be warned when I (or other developers on the project) attempt to access this property.

Answer 1

You can create a custom getter and declare it as deprecated:

- (UINavigationController*)navigationController __attribute__ ((deprecated))
{
    // do something
}

This way only when someone tries to call this getter he’ll get a warning.