MJRefresh刷新Demo

import "YFMVCPostListViewController.h"

import "YFArticleModel.h"

import <AFNetworking.h>

import <MJRefresh.h>

import <MBProgressHUD.h>

import "YFMVCPostViewController.h"

@interface YFMVCPostListViewController ()<UITableViewDelegate, UITableViewDataSource>
@property (nonatomic, strong) UITableView * tableView;
@property (nonatomic, strong) NSMutableArray * articles; //!< 文章数组,内部存储AFArticleModel类型.
@property (assign, nonatomic) NSInteger page; //!< 数据页数.表示下次请求第几页的数据.

@end

@implementation YFMVCPostListViewController

(void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
}
(NSMutableArray *)articles
{
if (nil == _articles) {
_articles = [NSMutableArray arrayWithCapacity: 42];
}

return _articles;
}
(void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
(void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear: animated];

// 马上进入刷新状态
[self.tableView.header beginRefreshing];
}

(UITableView *)tableView
{
if (nil == _tableView) {
_tableView = [[UITableView alloc] init];

  [self.view addSubview: _tableView];

  [_tableView makeConstraints:^(MASConstraintMaker *make) {
      make.edges.equalTo(UIEdgeInsetsMake(0, 0, 0, 0));
  }];

  _tableView.delegate = self;
  _tableView.dataSource = self;

  NSString * cellReuseIdentifier = NSStringFromClass([UITableViewCell class]);

  [_tableView registerClass: NSClassFromString(cellReuseIdentifier) forCellReuseIdentifier:cellReuseIdentifier];

  _tableView.header = [MJRefreshNormalHeader headerWithRefreshingBlock:^{
      self.page = 0;

      [self updateData];
  }];

  _tableView.footer = [MJRefreshBackNormalFooter footerWithRefreshingBlock:^{
      [self updateData];
  }];

}

return _tableView;
}

/**

更新视图.
*/

(void) updateView
{
[self.tableView reloadData];
}
/**

停止刷新
/
-(void)endRefresh{
[self.tableView.header endRefreshing];
[self.tableView.footer endRefreshing];
}
/*
更新数据.
数据更新后,会自动更新视图.
*/

(void)updateData
{
AFHTTPRequestOperationManager *manager = [AFHTTPRequestOperationManager manager];

NSString * urlStr = [NSString stringWithFormat: @"http://www.ios122.com/find_php/index.php?viewController=YFPostListViewController&model[category]=%@&model[page]=%ld", self.categoryName, (long)self.page ++];

[manager GET: urlStr parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
```
  [self endRefresh];

  if (1 == self.page) { // 说明是在重新请求数据.
      self.articles = nil;
  }

  NSArray * responseArticles = [YFArticleModel objectArrayWithKeyValuesArray: responseObject];

  [self.articles addObjectsFromArray: responseArticles];

  [self updateView];
```
} failure:^(AFHTTPRequestOperation *operation, NSError *error) {
[self endRefresh];
```
  MBProgressHUD *hud = [MBProgressHUD showHUDAddedTo:self.view animated:YES];
  hud.mode = MBProgressHUDModeText;
  hud.labelText = @"您的网络不给力!";
  [hud hide: YES afterDelay: 2];
```
}];
}

pragma mark - tabelView代理方法.

(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
NSInteger number = self.articles.count;

return number;
}
(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
NSString * cellReuseIdentifier = NSStringFromClass([UITableViewCell class]);

UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier: cellReuseIdentifier forIndexPath:indexPath];

YFArticleModel * model = self.articles[indexPath.row];

NSString * content = [NSString stringWithFormat: @"标题:%@ 内容:%@", model.title, model.desc];

cell.textLabel.text = content;

cell.selectionStyle = UITableViewCellSelectionStyleNone;

return cell;
}

(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// 跳转到博客详情.
YFArticleModel * articleModel = self.articles[indexPath.row];

YFMVCPostViewController * postVC = [[YFMVCPostViewController alloc] init];

postVC.articleID = articleModel.id;

[self.navigationController pushViewController: postVC animated: YES];
}