alertViewShouldEnableFirstOtherButton in UIAlertView subclass not called - ios

Question

I made a UIAlertView subclass. It implements two UIAlertViewDelegate methods: alertView:clickedButtonAtIndex: is called when expected, however alertViewShouldEnableFirstOtherButton: is never called.
Had a look at related posts and added:
[textField sendActionsForControlEvents:UIControlEventEditingChanged];
but without results. I seem to be out of options. What am I missing here?
#implementation MyAlertView
+ (MyAlertView*)showAlertForJson:(NSDictionary*)json delegate:(id<F2WebAlertDelegate>)delegate
{
MyAlertView* view = [[MyAlertView alloc] initWithJson:json delegate:delegate];
return view;
}
- (instancetype)initWithJson:(NSDictionary*)json delegate:(id<MyWebAlertDelegate>)delegate
{
if (self = [super initWithTitle:json[#"title"]
message:json[#"message"]
delegate:self
cancelButtonTitle:json[#"cancelTitle"]
otherButtonTitles:nil])
{
_json = json;
self.webDelegate = delegate;
for (NSString* title in json[#"otherTitles"])
{
[self addButtonWithTitle:title];
}
[self initInput:json[#"input"]];
[self show];
}
return self;
}
- (void)initInput:(NSDictionary*)json
{
if (json == nil)
{
return;
}
[json[#"style"] isEqualToString:#"plain"] ? self.alertViewStyle = UIAlertViewStylePlainTextInput : 0;
...
[self initTextField:[self textFieldAtIndex:0] withJson:json[#"field0"]];
if (self.alertViewStyle == UIAlertViewStyleLoginAndPasswordInput)
{
[self initTextField:[self textFieldAtIndex:1] withJson:json[#"field1"]];
}
}
- (void)initTextField:(UITextField*)textField withJson:(NSDictionary*)json
{
[textField sendActionsForControlEvents:UIControlEventEditingChanged];
if (textField == nil || json == nil)
{
return;
}
[json[#"keyboard"] isEqualToString:#"ascii"] ? (textField.keyboardType = UIKeyboardTypeASCIICapable) : 0;
...
}
#pragma mark - Alert View Delegate
- (void)alertView:(UIAlertView*)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
...
}
- (BOOL)alertViewShouldEnableFirstOtherButton:(UIAlertView*)alertView
{
return YES;
}
#end

Answer 1

Turns out that, as the delegate method's name suggest, you must specify a list otherButtonTitles to UIAlertView's initWithTitle:message:delegate:cancelButtonTitle:otherButtonTitles:.
So, buttons added later with addButtonWithTitle: do not count.