UITextField in UIAlertView on iPhone - how to make it responsive?

Question

I placed a UITextField into a UIAlertView and moved it up so the keyboard wouldn't cover it up with the following code:

[dialog setDelegate:self];
[dialog setTitle:@"Enter Name"];
[dialog addButtonWithTitle:@"Cancel"];
[dialog addButtonWithTitle:@"OK"];
UITextField * nameField = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)];
[nameField setBackgroundColor:[UIColor whiteColor]];
[dialog addSubview:nameField];
CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, 100.0);
[dialog setTransform: moveUp];
[dialog show];

I also have the following code to deal with the alert view:

- (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex{ 
 NSLog(@"%d", (int) buttonIndex);
 if (buttonIndex == 1) { // OK pushed
  NSLog([alert textField].text); // does not log anything
 } else {
  // Cancel pushed
}}

I also have a UIAlertViewExtended.h file that contains:

@class UITextField, UILabel;

@interface UIAlertView(Extended)

-(UITextField *)textField;

@end

My question is how do I get the text the user entered and how do I dismiss the keyboard?

Thanks, Ben

Answer 1

For those who may care, here's a working solution:

UIAlertView* dialog = [[UIAlertView alloc] init];
[dialog setDelegate:self];
[dialog setTitle:@"Enter Name"];
[dialog setMessage:@" "];
[dialog addButtonWithTitle:@"Cancel"];
[dialog addButtonWithTitle:@"OK"];

nameField = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)];
[nameField setBackgroundColor:[UIColor whiteColor]];
[dialog addSubview:nameField];
CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, 100.0);
[dialog setTransform: moveUp];
[dialog show];
[dialog release];
[nameField release];

Make sure you've created UITextField * nameField; in your .h file, then you can get at the text the user typed in by doing: inputText = [nameField text];

in the - (void) alertView:(UIAlertView *)alert clickedButtonAtIndex:(NSInteger)buttonIndex method.

Answer 2

A simple way to locate the text field, without keeping an explicit reference to it, is to set its tag:

nameField.tag = ALERTVIEW_NAMEFIELD;

Make sure it is different from 0 and from other UIView object tags you may have, including the parent dialog!

Then inside the alertView:clickedButtonAtIndex: handler, you can retrieve your text field this way:

UITextField *nameField = (UITextField *)[alertView viewWithTag:ALERTVIEW_NAMEFIELD];

Answer 3

It's worth checking out

http://junecloud.com/journal/code/displaying-a-password-or-text-entry-prompt-on-the-iphone.html?cmd=success#comment3870

For a complete and comprehensive solution.

Answer 4

At the same time i would like to ask, How to align text vertically Cenetered in UItextField..

I found for a textfield with height , whose text is 'boldSystemFontOfSize:15' is placed in textfield with a upward shift. I want to make the text centered (vertically) irrespective of the fotnSize...

Thanks, SujithKris

Answer 5

A quite nice approach is, you can use the delegate methods of the UITextFieldDelegate to move the dialog up only when the keyboard is activated. See below.

- (void)textFieldDidBeginEditing:(UITextField *)textField {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationDelegate:self];

    CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, -20);
    [dialog setTransform: moveUp];

    [UIView commitAnimations];
}

- (BOOL)textFieldShouldReturn:(UITextField *)textField {
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration:0.5]; 
    [UIView setAnimationDelegate:self];

    CGAffineTransform moveDown = CGAffineTransformMakeTranslation(0.0, 0.0);
    [dialog setTransform: moveDown];

    [textField resignFirstResponder];

    return YES;
}

Answer 6

Found more clear solution. Check this code snippet out: Username and Password UITextFields in UIAlertView prompt