快速下拉刷新动画

-(void)setupTableview{
    //添加下拉的动画图片
    //设置下拉刷新回调
    [self.tableView addGifHeaderWithRefreshingTarget:self refreshingAction:@selector(loadNewData)];
    
    //设置普通状态的动画图片
    NSMutableArray *idleImages = [NSMutableArray array];
    for (NSUInteger i = 1; i<=60; ++i) {
        //        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"dropdown_anim__000%zd",i]];
        //        [idleImages addObject:image];
        UIImage *image = [UIImage imageNamed:@"icon_listheader_animation_1"];
        [idleImages addObject:image];
    }
    [self.tableView.gifHeader setImages:idleImages forState:MJRefreshHeaderStateIdle];
    
    //设置即将刷新状态的动画图片
    NSMutableArray *refreshingImages = [NSMutableArray array];
    UIImage *image1 = [UIImage imageNamed:@"icon_listheader_animation_1"];
    [refreshingImages addObject:image1];
    UIImage *image2 = [UIImage imageNamed:@"icon_listheader_animation_2"];
    [refreshingImages addObject:image2];
    [self.tableView.gifHeader setImages:refreshingImages forState:MJRefreshHeaderStatePulling];
    
    //设置正在刷新是的动画图片
    [self.tableView.gifHeader setImages:refreshingImages forState:MJRefreshHeaderStateRefreshing];
    
    //马上进入刷新状态
    [self.tableView.gifHeader beginRefreshing];
}