开发者

Why do I get this 'Use of undeclare identifier addressbook' error?

NSArray* allPersons = 开发者_Go百科(NSArray*)ABAddressBookCopyArrayOfAllPeople(addressBook);

I get a Use of undeclare identifier addressbook error. Why?


The error you are getting answers your question. You are passing addressBook to the function, but you haven't defined addressBook.

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