解析

#import "ViewController.h" #import "AFNetworking.h" #import "Model.h" #import "TableViewCell.h" #import "SVProgressHUD.h" #import "MJRefresh.h" @interface ViewController ()<UITableViewDelegate,UITableViewDataSource>{     NSDictionary *dict; } @property(nonatomic , strong)UITableView *ojtable; @property(nonatomic , strong)NSMutableArray *array; @end @implementation ViewController //1．    创建工程，工程名设置为GoldToday，应用名设置为“今日黄金”，最低适用的iOS //系统版本为10.0（10分） -(UITableView *)ojtable{     if (!_ojtable) {         _ojtable = [[UITableView alloc]initWithFrame:self.view.frame style:UITableViewStylePlain];         _ojtable.delegate = self;         _ojtable.dataSource = self;     }     // 注册     [_ojtable registerNib:[UINib nibWithNibName:@"TableViewCell" bundle:nil] forCellReuseIdentifier:@"cell"];     return _ojtable; } - (void)viewDidLoad {     [super viewDidLoad];     self.array = [NSMutableArray array];     [self addheaderrefresh]; //    [self addfootrefresh];     [self.view addSubview:self.ojtable];     // af请求     [self loadNewData]; } - (void)loadNewData{     //显示加载栏     [SVProgressHUD showWithStatus:@"加载中..."];         AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];         manager.responseSerializer.acceptableContentTypes = [NSSet setWithObject:@"text/html"];         [manager GET:@"http://web.juhe.cn:8080/finance/gold/shgold?key=1b9f570e367ce24e51135d69eac7d04e" parameters:nil progress:^(NSProgress * _Nonnull downloadProgress) {                      } success:^(NSURLSessionDataTask * _Nonnull task, id  _Nullable responseObject) {             NSLog(@"%@",responseObject);             NSArray *arr = responseObject[@"result"];             NSDictionary *dict = [arr objectAtIndex:0];             // 添加数据             for (NSDictionary *dic in dict.allValues) {                 Model *model = [Model new];                 [model setValuesForKeysWithDictionary:dic];                 [self.array addObject:model];             }             [self.ojtable reloadData];             //取消刷新控件             [self.ojtable.mj_header endRefreshing];             [self.ojtable.mj_footer endRefreshing];             //去掉加载栏             [SVProgressHUD dismiss];         } failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {             NSLog(@"%@",error);             //提示用户             //取消刷新控件             [self.ojtable.mj_header endRefreshing];             [self.ojtable.mj_footer endRefreshing];             //去掉加载栏             [SVProgressHUD dismiss];         }]; } - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{     return self.array.count; } - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{     TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell"];     Model *model =self.array[indexPath.row];     cell.time.text = model.time;     //显示内容     cell.totalvol.text = model.totalvol;     cell.variety.text = model.variety;     cell.yespri.text = model.yespri;     return cell; } - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{     return 100; } //                 添加头部刷新 -(void)addheaderrefresh{     MJRefreshGifHeader *header=[MJRefreshGifHeader headerWithRefreshingBlock:^{                  //初始化页数         //清空数据源         [self.array removeAllObjects];         //重新发送网络请求         [self loadNewData];     }];     NSArray * imageArr = @[[UIImage imageNamed:@"common_loading_anne_0"],[UIImage imageNamed:@"common_loading_anne_1"]];     //添加正在刷新中的状态     [header setImages:imageArr forState:MJRefreshStateRefreshing];     //闲置状态     [header setImages:@[[UIImage imageNamed:@"common_loading_anne_0"]] forState:MJRefreshStateIdle];     //文字     [header setTitle:@"马上完成....." forState:MJRefreshStateRefreshing];     self.ojtable.mj_header=header; } //上拉加载 -(void)addfootrefresh{     MJRefreshAutoGifFooter *footer=[MJRefreshAutoGifFooter footerWithRefreshingBlock:^{         //重新请求数据         [self loadNewData];     }];     NSArray * imageArr = @[[UIImage imageNamed:@"loading_teemo_1"],[UIImage imageNamed:@"loading_teemo_2"]];     [footer setImages:imageArr forState:MJRefreshStateRefreshing];     self.ojtable.mj_footer=footer; }