- (void)viewDidLoad {    [super viewDidLoad];     // 集成刷新控件    [self setupRefresh];     } /** *  集成下拉刷新 */-(void)setupRefresh{    //1.添加刷新控件    UIRefreshControl *control=[[UIRefreshControl alloc]init];    [control addTarget:self action:@selector(refreshStateChange:) forControlEvents:UIControlEventValueChanged];    [self.tableView addSubview:control];         //2.马上进入刷新状态，并不会触发UIControlEventValueChanged事件    [control beginRefreshing];         // 3.加载数据    [self refreshStateChange:control];}

/** *  UIRefreshControl进入刷新状态：加载最新的数据 */-(void)refreshStateChange:(UIRefreshControl *)control{    // 3.发送请求    AFHTTPRequestOperationManager *mgr = [AFHTTPRequestOperationManager manager];         [mgr GET:@"https://api.weibo.com/2/statuses/public_timeline.json" parameters:nil success:^(AFHTTPRequestOperation *operation, NSDictionary *responseObject){                 //1.获取数据，处理数据，传递数据给tableView,如：                 // 将最新的微博数据，添加到总数组的最前面//        NSRange range = NSMakeRange(0, newStatuses.count);//        NSIndexSet *set = [NSIndexSet indexSetWithIndexesInRange:range];//        [self.statuses insertObjects:newStatuses atIndexes:set];                 //2.刷新表格        [self.tableView reloadData];                 // 3. 结束刷新        [control endRefreshing];             } failure:^(AFHTTPRequestOperation *operation, NSError *error) {         // 结束刷新刷新 ，为了避免网络加载失败，一直显示刷新状态的错误        [control endRefreshing];    }];}