MJRefreshGifHeader设置刷新动画

• 设置MJRefreshGifHeader 的子类，重写prepare 方法。

  @interface@interface  CLRefreshHeaderCLRefreshHeader : MJRefreshGifHeaderMJRefreshGifHeader
  @end
  

``` Swift
-(void)prepare{
    [super prepare];
    // 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:@"icon_refresh_1"];
        [idleImages addObject:image];
    }
    [self setImages:idleImages forState:MJRefreshStateIdle];
    // 设置即将刷新状态的动画图片（一松开就会刷新的状态）
    NSMutableArray *refreshingImages = [NSMutableArray array];
    for (NSUInteger i = 1; i<=7; i++) {
        UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"icon_refresh_%zd", i]];
        [refreshingImages addObject:image];
    }
    [self setImages:refreshingImages forState:MJRefreshStatePulling];
    // 设置正在刷新状态的动画图片
    [self setImages:refreshingImages forState:MJRefreshStateRefreshing];
}
```
<!--{% asset_img MJRefreshGifHeader设置刷新动画1.png   %}-->

• 设置tableView的header 刷新方法

  self.mTableView.header = [CLRefreshHeader headerWithRefreshingTarget:self refreshingAction:@selector(loadNewData)];