UIAlertView 和请求访问地址簿

Question

if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusNotDetermined) {
    ABAddressBookRequestAccessWithCompletion(addressBookRef, ^(bool granted, CFErrorRef error) {
        if (granted) {
            // First time access has been granted, add the contact
            [self prepareContactsIDs];
        } else {
            UIAlertView *accessDenied = [[UIAlertView alloc] initWithTitle:@"Need Access to Addressbook" message:@"KeepItClean requires an access to addressbook in order to be usable" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
            [accessDenied show];
        }
    });
}
else if (ABAddressBookGetAuthorizationStatus() == kABAuthorizationStatusAuthorized) {
    // The user has previously given access, add the contact
    if ([self isFirstRun]) {
        [self prepareContactsIDs];
    }
}
else {
    // The user has previously denied access
    // Send an alert telling user to change privacy setting in settings app
    UIAlertView *accessDenied = [[UIAlertView alloc] initWithTitle:@"Need Access to Addressbook" message:@"KeepItClean requires an access to addressbook in order to be usable" delegate:self cancelButtonTitle:@"Ok" otherButtonTitles:nil];
    [accessDenied show];
}

这里有一些我不明白的地方，当提示用户授予访问权限时，如果他点击取消，我没有显示我的第二个 UIAlertView，即 (accessDenied) 警报视图。

我也觉得有些东西我不明白，这与调度和队列有关。

Answer 1

试试这个

ABPeoplePickerNavigationController *peoplePicker = [[ABPeoplePickerNavigationController  alloc] init];
peoplePicker.peoplePickerDelegate= self;
ABAddressBookRef UsersAddressBook = ABAddressBookCreateWithOptions(NULL, NULL);

if (ABAddressBookGetAuthorizationStatus()!= kABAuthorizationStatusDenied)
{ 
    //Show alert of access
} 
else
{
    //Show alert of access denied
}