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[操作系统]获得通讯录的访问权


 1 ABAddressBookRef abRef = ABAddressBookCreateWithOptions(NULL, NULL); 2       if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusNotDetermined) { 3         ABAddressBookRequestAccessWithCompletion(abRef, ^(bool granted, CFErrorRef error) { 4           if (granted) { 5             ContactListViewController *contactListViewController = [[ContactListViewController alloc]init]; 6             [self.navigationController pushViewController:contactListViewController animated:YES]; 7           } 8         }); 9       }else if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusAuthorized){10         ContactListViewController *contactListViewController = [[ContactListViewController alloc]init];11         [self.navigationController pushViewController:contactListViewController animated:YES];12       }else{13         UIAlertController * tipAert = [UIAlertController alertControllerWithTitle:@"提示" message:@"请先允许访问通讯录" preferredStyle:(UIAlertControllerStyleAlert)];14         UIAlertAction *v1 = [UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action) {15         }];16         [tipAert addAction:v1];17         UIAlertAction *v2 = [UIAlertAction actionWithTitle:@"前往" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction * _Nonnull action) {18           [[UIApplication sharedApplication]openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];19         }];20         21         [tipAert addAction:v2];22         [self presentViewController:tipAert animated:YES completion:nil];23       }24       if (abRef) {25         CFRelease(abRef);26       }27