创建没有按钮的UIAlertView

    alert = [[[UIAlertView alloc] initWithTitle:@"\r\rConfiguring Preferences\rPlease Wait..."

                                         message:nil delegate:self cancelButtonTitle:nil otherButtonTitles: nil] autorelease];

    [alert show];

    

    

    //如果你还想给UIAlertView添加一个等待提示符，则可以这么做：

    

    alert = [[[UIAlertView alloc] initWithTitle:@"\r\rConfiguring Preferences\rPlease 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];