HomeViewController.m

/** 集成下拉刷新控件 */- (void)setupPullToRefreshView {       __unsafe_unretained UITableView *tableView = self.tableView;    // 下拉刷新    tableView.mj_header= [MJRefreshNormalHeader headerWithRefreshingBlock:^{        [self pullToRefresh:tableView.mj_header];    }];        // 设置自动切换透明度(在导航栏下面自动隐藏)    tableView.mj_header.automaticallyChangeAlpha = YES;        // 上拉刷新    tableView.mj_footer = [MJRefreshBackNormalFooter footerWithRefreshingBlock:^{        [self pullToLoad:tableView.mj_footer];    }];        [tableView.mj_header beginRefreshing]; // 开始进入刷新状态    }- (void)pullToRefresh:(MJRefreshHeader *)header {    AFHTTPSessionManager *requestManager = [AFHTTPSessionManager manager];        NSString *urlString = @"https://api.weibo.com/2/statuses/friends_timeline.json";    NSMutableDictionary *params = [NSMutableDictionary dictionary];    params[@"access_token"] = [DJAccountTool account].access_token;    DJStatus *status = [self.statuses firstObject];    if (status) {        params[@"since_id"] = status.idstr;                    }    [requestManager GET:urlString parameters:params progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary *  _Nullable responseObject) {        NSArray *newStatuses = [DJStatus mj_objectArrayWithKeyValuesArray:responseObject[@"statuses"]];        // 1. 将刷新获取到的新数据添加到总数组的头部        NSRange range = NSMakeRange(0, newStatuses.count);        NSIndexSet *indexSet = [[NSIndexSet alloc] initWithIndexesInRange:range];        [self.statuses insertObjects:newStatuses atIndexes:indexSet];                // 2. 刷新TableView        [self.tableView reloadData];                // 3. 结束刷新        [header endRefreshing];                // 4. 提示当前微博刷新数量        [self showRefreshStatusesNums:newStatuses.count];                    } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {        [header endRefreshing];    }];}- (void)pullToLoad:(MJRefreshFooter *)footer {    AFHTTPSessionManager *requestManager = [AFHTTPSessionManager manager];        NSString *urlString = @"https://api.weibo.com/2/statuses/friends_timeline.json";    NSMutableDictionary *params = [NSMutableDictionary dictionary];    params[@"access_token"] = [DJAccountTool account].access_token;    DJStatus *status = [self.statuses lastObject];    if (status) {        long long max_id = [status.idstr longLongValue] - 1;        params[@"max_id"] = @(max_id);    }    [requestManager GET:urlString parameters:params progress:nil success:^(NSURLSessionDataTask * _Nonnull task, NSDictionary *  _Nullable responseObject) {        NSArray *newStatuses = [DJStatus mj_objectArrayWithKeyValuesArray:responseObject[@"statuses"]];        // 1. 将刷新获取到的新数据添加到总数组的尾部        [self.statuses addObjectsFromArray:newStatuses];                // 2. 刷新TableView        [self.tableView reloadData];                // 3. 结束刷新        [footer endRefreshing];            } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {        [footer endRefreshing];    }];}

最终效果：