一、Model

1 #import 
     
       2  3 @interface Goods : NSObject 4  5 @property (nonatomic, copy) NSString *icon; 6 @property (nonatomic, copy) NSString *title; 7 @property (nonatomic, copy) NSString *price; 8 @property (nonatomic, copy) NSString *buyCount; 9 10 - (instancetype) initWithDict:(NSDictionary *)dict;11 + (instancetype) goodsWithDict:(NSDictionary *)dict;12 13 14 @end15 16 #import "Goods.h"17 18 @implementation Goods19 20 - (instancetype)initWithDict:(NSDictionary *)dict21 {22     if (self = [super init]) {23         [self setValuesForKeysWithDictionary:dict];24     }25     return self;26 }27 28 + (instancetype)goodsWithDict:(NSDictionary *)dict29 {30     return [[self alloc] initWithDict:dict];31 }32 33 @end
     

二、View

1 #import 
     
       2  3 @interface BWHeaderView : UIView 4  5 + (instancetype)headerView; 6  7 @end 8  9 #import "BWHeaderView.h"10 11 @interface BWHeaderView ()12 @property (weak, nonatomic) IBOutlet UIScrollView *scrollView;13 14 @end15 16 @implementation BWHeaderView17 18 //当这个方法被执行的时候就表示BWHeaderView已经从xib文件中创建好了19 //BWHeaderView的子控件也都创建好了，所以就可以使用UIScrollView了。20 - (void)awakeFromNib21 {22     23 }24 25 //创建headerView26 + (instancetype)headerView27 {28     BWHeaderView *headerView = [[[NSBundle mainBundle] loadNibNamed:@"BWHeaderView" owner:nil options:nil] lastObject];29     return headerView;30 }31 32 @end
     

 

 

1 #import 
     
       2  3 // 协议命名规范: 4 // 类名 + Delegate 5 // 协议中的方法最好加@optional 6 // 定义一个delegate属性,delegate属性用weak 7 // delegate属性声明为id类型,可以用来解除对头文件的依赖 8  9 @class BWFooterView;10 @protocol  BWFooterViewDelegate 
      
       11 12 @required13 - (void)footerViewUpDateData:(BWFooterView *)footerView;14 @end15 16 @interface BWFooterView : UIView17 18 @property(weak, nonatomic) id
       
         delegate;19 20 + (instancetype)footerView;21 22 @end23 24 #import "BWFooterView.h"25 26 @interface BWFooterView ()27 @property (weak, nonatomic) IBOutlet UIButton *btnLoadMore;28 @property (weak, nonatomic) IBOutlet UIView *waittingView;29 - (IBAction)btnLoadMoreClick:(id)sender;30 31 @end32 33 @implementation BWFooterView34 35 //通过xib设置tableView中的tableFooterView36 + (instancetype)footerView37 {38     BWFooterView *footerView = [[[NSBundle mainBundle] loadNibNamed:@"BWFooterView" owner:nil options:nil] lastObject];39     return footerView;40 }41 42 //加载按钮单击事件43 - (IBAction)btnLoadMoreClick:(id)sender {44     45     //1.隐藏“加载更多”按钮46     self.btnLoadMore.hidden = YES;47     //2.显示“等待指示器”所在的那个View48     self.waittingView.hidden = NO;49     50     dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1.0 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{51         //调用代理方法52         if ([self.delegate respondsToSelector:@selector(footerViewUpDateData:)]) {53             //3.增加一条数据54             //3.1创建一个模型对象55             //3.2把模型对象加载控制器的goods集合中56             //4.刷新UITableView57             [self.delegate footerViewUpDateData:self];58         }59         //5.显示“加载更多”按钮60         self.btnLoadMore.hidden = NO;61         //6.隐藏“等待指示器”所在的那个View62         self.waittingView.hidden = YES;63     });64     65 }66 @end
       
      
     

 

1 #import 
     
       2 @class Goods; 3  4 @interface BWGoodsCell : UITableViewCell 5  6 @property (weak, nonatomic) IBOutlet UIImageView *imgView; 7 @property (weak, nonatomic) IBOutlet UILabel *lblName; 8 @property (weak, nonatomic) IBOutlet UILabel *lblPrice; 9 @property (weak, nonatomic) IBOutlet UILabel *lblBuyCount;10 11 @property (strong, nonatomic) Goods *myGoods;12 13 + (instancetype)goodsCellWithTableView:(UITableView *)tableView;14 @end15 16 17 #import "BWGoodsCell.h"18 #import "Goods.h"19 20 @interface BWGoodsCell ()21 22 @end23 24 @implementation BWGoodsCell25 26 // 重写setMyGoods方法，把模型的数据设置给子控件27 - (void)setMyGoods:(Goods *)myGoods28 {29     _myGoods = myGoods;30     31     self.imgView.image = [UIImage imageNamed:_myGoods.icon];32     self.lblName.text = _myGoods.title;33     self.lblPrice.text = [NSString stringWithFormat:@"$ %@",_myGoods.price];34     self.lblBuyCount.text = [NSString stringWithFormat:@"%@个人已购买",_myGoods.buyCount];35 }36 37 // 创建单元格38 + (instancetype)goodsCellWithTableView:(UITableView *)tableView39 {40     static NSString *cellIndentifier = @"cellIndentifier";41     BWGoodsCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIndentifier];42     43     if (!cell) {44         cell = [[[NSBundle mainBundle] loadNibNamed:@"BWGoodsCell" owner:nil options:nil] firstObject];45     }46     return cell;47 }48 - (void)awakeFromNib {49     // Initialization code50 }51 52 - (void)setSelected:(BOOL)selected animated:(BOOL)animated {53     [super setSelected:selected animated:animated];54 55     // Configure the view for the selected state56 }57 58 @end
     

 

三、Controller

1 #import "ViewController.h"  2 #import "Goods.h"  3 #import "BWGoodsCell.h"  4 #import "BWFooterView.h"  5 #import "BWHeaderView.h"  6   7 @interface ViewController ()
     
        8   9 @property (nonatomic, strong) NSMutableArray *arrayModel; 10 @property (nonatomic, strong) UITableView *tableView; 11  12 @end 13  14 @implementation ViewController 15  16 #pragma mark - 懒加载 17 - (NSArray *)arrayModel 18 { 19     if (_arrayModel == nil) { 20         NSString *path = [[NSBundle mainBundle] pathForResource:@"tgs.plist" ofType:nil]; 21          22         NSArray *arrayDict = [NSArray arrayWithContentsOfFile:path]; 23          24         NSMutableArray *arrayModel = [NSMutableArray array]; 25          26         for (NSDictionary *dict in arrayDict) { 27             Goods *goodsModel = [Goods goodsWithDict:dict]; 28             [arrayModel addObject:goodsModel]; 29         } 30         _arrayModel = arrayModel; 31     } 32      33     return _arrayModel; 34 } 35  36 #pragma mark - 加载视图 37 - (void)viewDidLoad { 38     [super viewDidLoad]; 39     self.tableView = [[UITableView alloc] initWithFrame:self.view.frame style:UITableViewStyleGrouped]; 40     self.tableView.dataSource =self; 41      42     [self.view addSubview:self.tableView]; 43     self.tableView.rowHeight = 100; 44  45     //ps:tableView 的tableFooterView特点：只能修改x和height值，y和height不能修改 46      47     //创建tableFooterView 48     BWFooterView *footerView = [BWFooterView footerView]; 49     //设置footerView的代理 50     footerView.delegate =self; 51     self.tableView.tableFooterView = footerView; 52      53     //创建tableHeaderView 54     BWHeaderView *headerView = [BWHeaderView headerView]; 55      56     self.tableView.tableHeaderView = headerView; 57      58      59 } 60 #pragma mark - CZFooterView的代理方法 61 - (void)footerViewUpDateData:(BWFooterView *)footerView 62 { 63     //3.增加一条数据 64     //3.1创建一个模型对象 65     Goods *model = [[Goods alloc] init]; 66     model.title = @"驴肉火烧"; 67     model.price = @"6.0"; 68     model.buyCount = @"1000"; 69     model.icon = @"7003217f16ed29bab85e635a3bd6b60d"; 70     //3.2把模型对象加载控制器的goods集合中 71     [self.arrayModel addObject:model]; 72     //4.刷新UITableView 73     [self.tableView reloadData]; 74      75     //ps:局部刷新（仅适用于UITableView的总行数没有发生变化的时候） 76 //    NSIndexPath *indexpath =  [NSIndexPath indexPathForRow:self.arrayModel.count-1 inSection:0]; 77 //    [self.tableView reloadRowsAtIndexPaths:@[indexpath] withRowAnimation:UITableViewRowAnimationLeft]; 78      79     //5.把UITableView中最后一行滚动到最上面 80     NSIndexPath *indexpath =  [NSIndexPath indexPathForRow:self.arrayModel.count-1 inSection:0]; 81     [self.tableView scrollToRowAtIndexPath:indexpath atScrollPosition:UITableViewScrollPositionTop animated:YES]; 82 } 83  84 #pragma mark - 数据源 85 //加载组的行数 86 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section 87 { 88     return self.arrayModel.count; 89 } 90 //加载单元格数据 91 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 92 { 93     //1.获取数据模型 94     Goods *goodsModel = self.arrayModel[indexPath.row]; 95      96     //2.创建单元格 97     BWGoodsCell *cell = [BWGoodsCell goodsCellWithTableView:tableView]; 98  99 //   在控制器中直接为cell的每个子控件赋值数据造成问题100 // 1>控制器强依赖于cell，一旦cell内部的子控件发生变化，那么子控件中的代码也得改（紧耦合）101 // 2>cell封装不够完整，凡是用到cell的地方102 // 3>解决：直接把模型传递给自定义cell，然后在自定义cell内部解析model中的数据赋值给自定义cell的内部的子控件103 104     //3.把模型数据设置给单元格105     cell.myGoods = goodsModel;106     107     //4.返回单元格108     return cell;109 }110 111 #pragma mark - 状态栏112 - (BOOL)prefersStatusBarHidden113 {114     return YES;115 }116 117 #pragma mark - 内存118 - (void)didReceiveMemoryWarning {119     [super didReceiveMemoryWarning];120     // Dispose of any resources that can be recreated.121 }122 123 @end