How can you get system generated alertview for address book - ios

Question

I am working on Address book in My application,I just want to get an alertview for accessing Address.How Can i show System Generated Alert for accessing addressBook?

Answer 1

If you want to show the user a custom message when asking for permission to use their contacts or address book, instead of the default one shown above, you need to add this field to your Info.plist file:
NSContactsUsageDescription
Here is apple developer link for the same:
https://developer.apple.com/library/ios/documentation/General/Reference/InfoPlistKeyReference/Articles/CocoaKeys.html#//apple_ref/doc/uid/TP40009251-SW14

Answer 2

// Check the authorization status of your application for Address Book
-(void)checkAddressBookAccess
{
switch (ABAddressBookGetAuthorizationStatus())
{
// Update our UI if the user has granted access to their Contacts
case kABAuthorizationStatusAuthorized:
[self showAddressBook];
break;
// Prompt the user for access to Contacts if there is no definitive answer
case kABAuthorizationStatusNotDetermined :
[self requestAddressBookAccess];
break;
// Display a message if the user has denied or restricted access to Contacts
case kABAuthorizationStatusDenied:
case kABAuthorizationStatusRestricted:
{
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Warning"
message:#"You have not granted access to your contacts or you have revoked it earlier."
delegate:nil
cancelButtonTitle:#"OK"
otherButtonTitles:nil];
[alert show];
}
break;
default:
break;
}
}
// Prompt the user for access to their Address Book data
-(void)requestAddressBookAccess
{
TF_Message_View_Controller * __weak weakSelf = self;
ABAddressBookRequestAccessWithCompletion(self.addressBook, ^(bool granted, CFErrorRef error)
{
if (granted)
{
dispatch_async(dispatch_get_main_queue(), ^{
[weakSelf showAddressBook];
});
}
});
}

Answer 3

If you wanted to show the alert asking for permission, you can use the following code
This code works with Contacts framework, which is available only for iOS 9.0+
- (void)checkContactStoreAccess {
self.contactsStrore = [[CNContactStore alloc] init];
switch ([CNContactStore authorizationStatusForEntityType:CNEntityTypeContacts]) {
case CNAuthorizationStatusAuthorized: {
[self fetchContactsFromContactStore];
break;
}
case CNAuthorizationStatusNotDetermined:{
[self requestContactsAccess];
break;
}
case CNAuthorizationStatusDenied:
case CNAuthorizationStatusRestricted:{
//show info that access denied for contact and redirect user to settings with
[UIApplication sharedApplication] openURL:[NSURL URLWithString:UIApplicationOpenSettingsURLString]];
}
}
}
- (void)requestContactsAccess {
typeof(self) __weak weakSelf = self;
[self.contactsStrore requestAccessForEntityType:CNEntityTypeContacts completionHandler:^(BOOL granted, NSError * _Nullable error) {
[weakSelf fetchContactsFromContactStore];
}];
}