Taking Text From a UIAlertView

Question

There seems to be something missing, but the below code is generating nil values for both title and title1 (even though it launches the right alert type correctly and doesn't indicate any warning or error). What could be the problem with this implementation of UIAlertView?

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"High Score" message:(NSString *)scoreMessage delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil]; alert.alertViewStyle= UIAlertViewStylePlainTextInput; UITextField *title1 = [alert textFieldAtIndex:0]; [alert show]; title1= [alert textFieldAtIndex:0]; NSString *title = title1.text; NSLog(@"The name is %@",title); NSLog(@"Using the Textfield: %@",[[alert textFieldAtIndex:0] text]);

RJR · Accepted Answer · 2015-10-15 16:33:54Z

Present alert somewhere in you code and set the view controller from it was presented as the delegate for your UIAlertView.Then implement the delegate to receive the event.

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"High Score" message:@"Score Message" delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil]; alert.alertViewStyle= UIAlertViewStylePlainTextInput; [alert show];

Implement the delegate method

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{ UITextField *textField = [alertView textFieldAtIndex:0]; NSString *title = textField.text; NSLog(@"The name is %@",title); NSLog(@"Using the Textfield: %@",[[alertView textFieldAtIndex:0] text]); }

Any particular reason you put the delegate as nil, and then assigned it to self in the very next line?
Thanks! for that. There is no particular reason. Updated now.
Happy to help! :) You're also declaring title1 at the same thing twice in a row, in the second block of code. You can lose that second line entirely.

omz · Accepted Answer · 2013-04-23 14:02:20Z

[alert show] returns immediately, before the user could have entered any text in the text field. You need to get the text after the alert has been dismissed by setting its delegate and implementing alertView:clickedButtonAtIndex: (for example, there are a couple of other possibilities).

RStack · Accepted Answer · 2015-11-10 05:14:23Z

In iOS 8 UIAlertview has been deprecated. UIAlertController is used instead of that.

UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"Add Fruit" message:@"Type to add a fruit" preferredStyle:UIAlertControllerStyleAlert]; [alert addTextFieldWithConfigurationHandler:^(UITextField *textField){ textField.placeholder = @"Fruit"; }]; UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"OK" style:UIAlertActionStyleDefault handler:^(UIAlertAction *action) { UITextField *textFiel = [alert.textFields firstObject]; [fruits addObject:textFiel.text]; }]; [alert addAction:okAction]; [self presentViewController:alert animated:YES completion:nil];

Undo · Accepted Answer · 2013-04-23 14:08:07Z

You'll need to wait for the delegate callback alertView:clickedButtonAtIndex to get the text - keep a reference to your text field and show the alert, setting its delegate to self. When that method is called, the user has pressed the button to say they are finished entering text, so it's probably now safe to grab the text out of the text field.

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