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    <p>Add a target to the textfield in a subclassed alertView. You can subclass the alertView and not dismiss <a href="https://stackoverflow.com/questions/2051402/is-it-possible-to-not-dismiss-a-uialertview">as described in this post</a></p> <pre><code>[[alertView textFieldAtIndex:0] addTarget:self action:@selector(textFieldDidChange) forControlEvents:UIControlEventEditingChanged]; </code></pre> <p>Then write a function called textFieldDidChange that checks the current textfield of your alertView and set a boolean value so you know whether or not to dismiss the alert. </p> <pre><code>- (void) textFieldDidChange { NSString *alertViewText = [[alertView textFieldAtIndex:0] text]; if ([alertViewText isEqualToString:@""]) { [alertView setMessage:@"Enter a name please."]; } else { [alertView setMessage:@"Default Message"]; } } </code></pre> <p><strong>* Alternatively, I would suggest disabling "Save" when it is empty and not have to subclass. *</strong></p> <pre><code>- (void) textFieldDidChange { NSString *alertViewText = [[alertView textFieldAtIndex:0] text]; if ([alertViewText isEqualToString:@""]) { [alertView setMessage:@"Enter a name please."]; for (UIViewController *view in alertView.subview) { if ([view isKindOfClass:[UIButton class]]) { UIButton *button = (UIButton *)view; if ([[[button titleLabel] text] isEqualToString:@"Save"]) [button setEnabled:NO]; } } } else { [alertView setMessage:@"Default Message"]; for (UIViewController *view in alertView.subview) { if ([view isKindOfClass:[UIButton class]]) { UIButton *button = (UIButton *)view; if ([[[button titleLabel] text] isEqualToString:@"Save"]) [button setEnabled:YES]; } } } } </code></pre>
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    1. POKeep UIAlertView displayed
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    1. COWhoa, thanks for the reply Brendan. I thought it would be much easier. So, I've decided to make an AlertView of my own from scratch. Thanks again! :)
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    2. COI currently have the alternative approach implemented in an app which is not that hard and gives you a lot of power. For example, you could disable the "Save" button when the user has entered ANY unallowed name. This could include an empty string, a name already in use or a banned name (such as a vulgar word or keyword). It also makes it so that the alertView:willDismissWithButtonIndex does not have to do any error checking as the user can only hit "Cancel" for an invalid name.
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    3. COYeah, I get that, it's just that I've started implementing custom made notifications in my app and I've decided that I need to majorly redesign the AlerViews as well. And that will be more work and more complicated for me then modifying the native alerts
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