加载完成提醒

-(void)showWarnView

{

    warnView = [[UIView alloc]initWithFrame:CGRectMake(110, 130, 100, 50)];

    warnView.layer.cornerRadius = 8.5;

    UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(0, 17, 100, 20)];

    label.text = @"待开发中";

    label.font = [UIFont systemFontOfSize:12.0];

    label.textColor = [UIColor whiteColor];

    label.textAlignment = UITextAlignmentCenter;

    label.backgroundColor = [UIColor clearColor];

    [warnView addSubview:label];

    warnView.backgroundColor = [UIColor blackColor];

    [self.view addSubview:warnView];

    [warnView performSelector:@selector(removeFromSuperview) withObject:nil afterDelay:0.5];

}