I have Used in cocos2d game engine. this is my code:
-(void)timed1: (id)sender {
UIAlertView *dialog = [[[UIAlertView alloc] init] retain];
[dialog setDelegate:self];
[dialog setTitle:@"Enter Time:"];
[dialog setMessage:@" "];
UITextField *nameField = [[UITextField alloc] initWithFrame:CGRectMake(20.0, 45.0, 245.0, 25.0)];
[dialog addSubview:nameField];
[nameField setBackgroundColor:[UIColor whiteColor]];
CGAffineTransform moveUp = CGAffineTransformMakeTranslation(0.0, 70.0);
[dialog setTransform: moveUp];
[dialog addButtonWithTitle:@"Done"];
[dialog addButtonWithTitle:@"Cancel"];
nameField.clearButtonMode = UITextFieldViewModeWhileEditing;
nameField.keyboardType = UIKeyboardTypeNumbersAndPunctuation;
//timeStatus is a int type global variable //
timeStatus =[nameField.text intValue]; //** this line not working**//
[nameField release];
[dialog show];
}