ios - UIAlertView's textfield does not show keyboard in iOS8

Question

@implementation
UIAlertView *query;
@end

- (void)viewWillAppear:(BOOL)animated {
query = [[UIAlertView alloc]
                      initWithTitle:NSLocalizedString(@"New", @"")
                      message:nil
                      delegate:self
                      cancelButtonTitle:NSLocalizedString(@"Cancel", nil)
                      otherButtonTitles:NSLocalizedString(@"OK", @""), nil];
query.alertViewStyle = UIAlertViewStylePlainTextInput;
UITextField *textField = [_query textFieldAtIndex:0];
textField.placeholder = NSLocalizedString(@"Title", @"placeholder text where user enters name for new playlist");
textField.delegate = self;
[_query show];
}

After UIAlertView is shown, keyboard is shown too and UITextfield is focus (It just works on pre iOS7, but does not work in iOS8). I have tried [textfield becomeFirstResponder], but it does not worked. I create new project and use cove above, it works.

My problem: Keyboard does not shown with UIAlertViewStylePlainTextInput style.

I don't know why? Can anybody helps me? Thanks.

Answer 1

Here's a slight improvement to Chen Lim's hack/fix, to be placed in the UIAlertViewDelegate:

- (void)didPresentAlertView:(UIAlertView *)alertView {
    if (isIOS8) {
        // hack alert: fix bug in iOS 8 that prevents text field from appearing
        UITextRange *textRange = [[alertView textFieldAtIndex:0] selectedTextRange];
        [[alertView textFieldAtIndex:0] selectAll:nil];
        [[alertView textFieldAtIndex:0] setSelectedTextRange:textRange];
    }
}

(You'll have to implement an isIOS8 method, property, or iVar.)