UIAlertView - retrieve textfield value from textfield added via code - iphone

Question

Here is the code I have to create an UIAlertView with a textbox.
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Enter A Username Here" message:#"this gets covered!"
delegate:self cancelButtonTitle:#"Dismiss" otherButtonTitles:#"OK!", nil];
UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0, 60);
[alert setTransform:myTransform];
alert.tag = kAlertSaveScore;
[myTextField setBackgroundColor:[UIColor whiteColor]];
[alert addSubview:myTextField];
[alert show];
[alert release];
[myTextField release];
My question is, how do I get the value from the textfield in:
- (void) alertView:(UIAlertView *) actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
}
I know I can get the standard stuff for the alertview such as actionSheet.tag and such, but how would I get the above created textfield?

Answer 1

#interface MyClass {
UITextField *alertTextField;
}
#end
And instead of declaring it locally, just use that.
//...
alertTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
//...
- (void) alertView:(UIAlertView *) alertView clickedButtonAtIndex:(NSInteger)buttonIndex {
NSString *text = alertTextField.text;
alertTextField = nil;
}

Answer 2

Just give it a tag, and find it using the tag later. So, using your code:
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:#"Enter A Username Here" message:#"this gets covered!"
delegate:self cancelButtonTitle:#"Dismiss" otherButtonTitles:#"OK!", nil];
UITextField *myTextField = [[UITextField alloc] initWithFrame:CGRectMake(12, 45, 260, 25)];
CGAffineTransform myTransform = CGAffineTransformMakeTranslation(0, 60);
[alert setTransform:myTransform];
alert.tag = kAlertSaveScore;
// Give the text field some unique tag
[myTextField setTag:10250];
[myTextField setBackgroundColor:[UIColor whiteColor]];
[alert addSubview:myTextField];
[alert show];
[alert release];
[myTextField release];
Then, in the call-back, wherever that happens to be and without having to worry about memory management or state management of the text field:
- (void) alertView:(UIAlertView *) actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
// Get the field you added to the alert view earlier (you should also
// probably validate that this field is there and that it is a UITextField but...)
UITextField* myField = (UITextField*)[actionSheet viewWithTag:10250];
NSLog(#"Entered text: %#", [myField text]);
}