源码-0205-02--表格数据的更新

//  XMGDealsViewController.m
//  06-自定义等高cell01-storyboard
#import "XMGDealsViewController.h"
#import "XMGDeal.h"
#import "XMGDealCell.h"

@interface XMGDealsViewController () <UITableViewDataSource, UITableViewDelegate>
@property (weak, nonatomic) IBOutlet UITableView *tableView;
/** 所有的团购数据 */
@property (nonatomic, strong) NSMutableArray *deals;
@end

@implementation XMGDealsViewController

- (NSMutableArray *)deals
{
    if (_deals == nil) {
        // 加载plist中的字典数组
        NSString *path = [[NSBundle mainBundle] pathForResource:@"deals.plist" ofType:nil];
        NSArray *dictArray = [NSArray arrayWithContentsOfFile:path];
        
        // 字典数组 -> 模型数组
        NSMutableArray *dealArray = [NSMutableArray array];
        for (NSDictionary *dict in dictArray) {
            XMGDeal *deal = [XMGDeal dealWithDict:dict];
            [dealArray addObject:deal];
        }
        
        _deals = dealArray;
    }
    return _deals;
}


- (void)viewDidLoad {
    [super viewDidLoad];
    
}

- (IBAction)switchEditing {
    // 进入编辑模式
    //    self.tableView.editing = YES;
    [self.tableView setEditing:!self.tableView.isEditing animated:YES];
}


- (IBAction)add {
    // tableView里面需要显示新的cell数据，只需要操作模型数据
    XMGDeal *deal = [[XMGDeal alloc] init];
    deal.title = [NSString stringWithFormat:@"XX饭店大打折 %d折", arc4random_uniform(50)];
    deal.price = [NSString stringWithFormat:@"%d", 10 + arc4random_uniform(100)];
    deal.buyCount = [NSString stringWithFormat:@"%d", arc4random_uniform(1000)];
    deal.icon = @"5ee372ff039073317a49af5442748071";
    [self.deals insertObject:deal atIndex:0];
    
    XMGDeal *deal2 = [[XMGDeal alloc] init];
    deal2.title = [NSString stringWithFormat:@"YY饭店大打折 %d折", arc4random_uniform(50)];
    deal2.price = [NSString stringWithFormat:@"%d", 10 + arc4random_uniform(100)];
    deal2.buyCount = [NSString stringWithFormat:@"%d", arc4random_uniform(1000)];
    deal2.icon = @"5ee372ff039073317a49af5442748071";
    [self.deals insertObject:deal2 atIndex:0];
    
    // 提醒tabelView，模型数据发生了变化，请重新识别，请重新向数据源索要数据
    [self.tableView reloadData];
    // 插入某些特定的行
//    [self.tableView insertRowsAtIndexPaths:@[　　　　　　　　//第多少行         第多少组
//                                             [NSIndexPath indexPathForRow:0 inSection:0],
//                                             [NSIndexPath indexPathForRow:1 inSection:0]
//                                             ] withRowAnimation:UITableViewRowAnimationLeft];
}

- (IBAction)remove {
    // 移除模型数据
    [self.deals removeObjectAtIndex:0];
    [self.deals removeObjectAtIndex:0];
    [self.deals removeObjectAtIndex:0];
    
    // 刷新表格
    [self.tableView reloadData];
//    [self.tableView deleteRowsAtIndexPaths:@[
//                                             [NSIndexPath indexPathForRow:0 inSection:0],
//                                             [NSIndexPath indexPathForRow:1 inSection:0],
//                                             [NSIndexPath indexPathForRow:2 inSection:0]
//                                             ] withRowAnimation:UITableViewRowAnimationRight];
    
    // 15个cell：13
    // 15个模型：12
　　//模型数和cell数必须相同；

}

- (IBAction)update {
//    XMGDealCell *cell = (XMGDealCell *)[self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:3 inSection:0]];
//    cell.priceLabel.text = @"￥999";
//    
//    return;
    // 修改模型
    XMGDeal *deal = self.deals[3];
    deal.price = [NSString stringWithFormat:@"%d", 50 + arc4random_uniform(100)];;
    
    // 刷新表格
    [self.tableView reloadData];
//    [self.tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForRow:3 inSection:0]] withRowAnimation:UITableViewRowAnimationMiddle];
}

#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return self.deals.count;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {    // 创建cell
    XMGDealCell *cell = [XMGDealCell cellWithTableView:tableView];
    
    // 取出模型数据
    cell.deal = self.deals[indexPath.row];
    
    return cell;
}

#pragma mark - TableView代理方法
/**
 * 只要实现这个方法，左划cell出现删除按钮的功能就有了
 * 用户提交了添加（点击了添加按钮）删除（点击了删除按钮）操作时会调用
 */
- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath
{
    if (editingStyle == UITableViewCellEditingStyleDelete) {  // 点击了“删除”
        // 删除模型
        [self.deals removeObjectAtIndex:indexPath.row];
        
        // 刷新表格
        [self.tableView deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationLeft];
    } else if (editingStyle == UITableViewCellEditingStyleInsert) { // 点击了+
        NSLog(@"+++++ %zd", indexPath.row);
    }
}
/**
 * 这个方法决定了编辑模式时，每一行的编辑类型：insert（+按钮）、delete（-按钮）
 */
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return indexPath.row % 2 == 0? UITableViewCellEditingStyleInsert: UITableViewCellEditingStyleDelete;
}
@end

//  XMGDealCell.h
//  06-自定义等高cell01-storyboard
#import <UIKit/UIKit.h>
@class XMGDeal;

@interface XMGDealCell : UITableViewCell
@property (weak, nonatomic) IBOutlet UILabel *priceLabel;
/** 团购模型数据 */
@property (nonatomic, strong) XMGDeal *deal;

+ (instancetype)cellWithTableView:(UITableView *)tableView;
@end

//  XMGDealCell.m
//  06-自定义等高cell01-storyboard
#import "XMGDealCell.h"
#import "XMGDeal.h"

@interface XMGDealCell()
@property (weak, nonatomic) IBOutlet UIImageView *iconView;
@property (weak, nonatomic) IBOutlet UILabel *titleLabel;
@property (weak, nonatomic) IBOutlet UILabel *buyCountLabel;
@end

@implementation XMGDealCell

+ (instancetype)cellWithTableView:(UITableView *)tableView
{
    static NSString *ID = @"deal";
    XMGDealCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
    if (cell == nil) {
        cell = [[[NSBundle mainBundle] loadNibNamed:NSStringFromClass([XMGDealCell class]) owner:nil options:nil] lastObject];
    }
    return cell;
}

- (void)setDeal:(XMGDeal *)deal
{
    _deal = deal;
    
    // 设置数据
    self.iconView.image = [UIImage imageNamed:deal.icon];
    self.titleLabel.text = deal.title;
    self.priceLabel.text = [NSString stringWithFormat:@"￥%@", deal.price];
    self.buyCountLabel.text = [NSString stringWithFormat:@"%@人已购买", deal.buyCount];
}

@end

//  XMGDeal.h
//  06-自定义等高cell01-storyboard
#import <Foundation/Foundation.h>

@interface XMGDeal : NSObject
@property (strong, nonatomic) NSString *buyCount;
@property (strong, nonatomic) NSString *price;
@property (strong, nonatomic) NSString *title;
@property (strong, nonatomic) NSString *icon;

+ (instancetype)dealWithDict:(NSDictionary *)dict;
@end

//  XMGDeal.m
//  06-自定义等高cell01-storyboard
#import "XMGDeal.h"

@implementation XMGDeal
+ (instancetype)dealWithDict:(NSDictionary *)dict
{
    XMGDeal *deal = [[self alloc] init];
    
//    deal.title = dict[@"title"];
//    deal.icon = dict[@"icon"];
//    deal.buyCount = dict[@"buyCount"];
//    deal.price = dict[@"price"];
    
    // KVC - Key Value Coding
    [deal setValuesForKeysWithDictionary:dict];
    
    return deal;
}
@end