//Declare in class following vairiable

UIAlertView *alert;

-(void)showAlert{

    alert = [[[UIAlertView alloc] initWithTitle:@"Please Wait..." message:nil delegate:self cancelButtonTitle:nil otherButtonTitles: nil] autorelease];

    [alert show];

    UIActivityIndicatorView *indicator = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];

    indicator.center = CGPointMake(alert.bounds.size.width / 2, alert.bounds.size.height - 50);

    [indicator startAnimating];

    [alert addSubview:indicator];

    [indicator release];

}

-(void)dismissAlert{

    [alert dismissWithClickedButtonIndex:0 animated:YES];

    [alert release];

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{

if (buttonIndex == 1) {

//OK clicked

} else {

}

}

- (void) _showAlert:(NSString*)title

{

UIAlertView* alertView = [[UIAlertView alloc] initWithTitle:title message:@"Check your networking configuration." delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];

[alertView show];

[alertView release];

}

// open a alert with text field,  OK and cancel button

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Send Email" message:@" "

       delegate:self cancelButtonTitle:@"Cancel" otherButtonTitles:@"Send", nil];

CGRect frame = CGRectMake(14, 45, 255, 23);

if(!emailField) {

emailField = [[UITextField alloc] initWithFrame:frame];

emailField.borderStyle = UITextBorderStyleBezel;

emailField.textColor = [UIColor blackColor];

emailField.textAlignment = UITextAlignmentCenter;

emailField.font = [UIFont systemFontOfSize:14.0];

emailField.placeholder = @"<enter email>";

emailField.backgroundColor = [UIColor whiteColor];

emailField.autocorrectionType = UITextAutocorrectionTypeNo; // no auto correction support

emailField.keyboardType = UIKeyboardTypeEmailAddress; // use the default type input method (entire keyboard)

emailField.returnKeyType = UIReturnKeyDone;

emailField.delegate = self;

emailField.clearButtonMode = UITextFieldViewModeWhileEditing; // has a clear 'x' button to the right

}

[alert addSubview:emailField];

[alert show];

[alert release];