UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"" message:@"感谢你对我们提出的意见或建议，你的支持就是我们进步的动力！" delegate:self cancelButtonTitle:@"我知道了" otherButtonTitles:nil, nil];

[alert show];

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

    if (buttonIndex==) {

        [self backForward];

    }

}

UIAlertView *alert = [[UIAlertView alloc]initWithTitle:@"" message:@"感谢你对我们提出的意见或建议，你的支持就是我们进步的动力！" delegate:self cancelButtonTitle:@"我知道了" otherButtonTitles:nil, nil];

dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.4f * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{

    [alert show];

});

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

    if (buttonIndex==) {

        [self performSelector:@selector(backForward) withObject:nil afterDelay:0.25f];

    }

}