新浪微博客户端(20)-集成MJRefresh

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：