If you played with Location Services in iPhone, you knows that after you changed the location setting in iPhone Settings, you are able to get the change and update your application. While Contact(AddressBook) and Location Services are both packed in Privacy Setting, you would expect there is similar behaviour on Contact.
Sadly, its not true. After you changed the setting of contact, your app will receive a SIGKILL signal and stop.
Source:StackOverflow
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