iPhone - ABPeoplePickerNavigationController：显示“电话”属性但不是铃声

Question

使用下面的代码，我将调出一个人员选择器，以便用户可以选择电话或电子邮件地址。我已将可显示属性设置为电子邮件和电话，但“铃声”属性在电话组中可见。考虑到此人员选择器实例的目的，此处显示铃声选择绝对没有意义。有谁知道怎么去掉手机群里的吗？

ABPeoplePickerNavigationController *picker = [[ABPeoplePickerNavigationController alloc] init];

NSArray *propertiesToShow = [NSArray arrayWithObjects:[NSNumber numberWithInt:kABPersonEmailProperty],
                              [NSNumber numberWithInt:kABPersonPhoneProperty], nil];

[picker setDisplayedProperties:propertiesToShow];

[picker setPeoplePickerDelegate:self];

[self presentModalViewController:picker animated:YES];
[picker release];