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POWork around of "No known instance method for selector" error for id type
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2012-09-15T06:21:05.687
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My iPhone app has a login view controller to pop up whenever it is necessary to login. After the user loged in, I have this: <pre><code> if ([self.presentingViewController respondsToSelector:@selector(userDidLogin)]) { [((id)self.presentingViewController) userDidLogin]; } else { [self.presentingViewController dismissModalViewControllerAnimated:YES]; } </code></pre> However, the compiler kept complaining about "No known instance method for selector userDidLogin". Then I added an instance method named <code>userDidLogin</code> for the login view controller, which was of course not <code>self.presentingViewController</code>, then the build succeeded. This workaround feels unreasonable to me. Is it a bug in Xcode or intended behavior? Is it is the latter, what is the rationale?
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Work around of "No known instance method for selector" error for id type
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