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 s         


        

Answer 1

Anyone supporting iOS 5.0 onwards with ARC, there's this direct alertViewStyle property you can set:

-(void)showAlertWithTextField{
    UIAlertView* dialog = [[UIAlertView alloc] initWithTitle:@"Enter Name" message:@"" delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Add", nil];    
    [dialog setAlertViewStyle:UIAlertViewStylePlainTextInput];

    // Change keyboard type
    [[dialog textFieldAtIndex:0] setKeyboardType:UIKeyboardTypeNumberPad];
    [dialog show];
}

-(void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
    if (buttonIndex == 1)
        NSLog(@"%@",[[alertView textFieldAtIndex:0]text]);
}

Answer 2

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.

important note: for iOS 4.0+, the CGAffineTransform is done automatically so you can leave that bit out if you're only targeting 4.0+. Otherwise, you will need to check which OS you are on and handle it accordingly.

Answer 3

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 4

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