这个项目是本人原创：要转载，请说明下：http://www.cnblogs.com/blogwithstudyofwyn/p/5618107.html

项目的地址：https://github.com/Shangshanroushui/ShoppingCart.git

该程序是个一元夺宝的的购物车。

项目中依然使用的MVC

model:是商品的全部信息

GoodsInfoModel.h

@property(strong,nonatomic)NSString *imageName;//商品图片

@property(strong,nonatomic)NSString *goodsTitle;//商品标题

@property(strong,nonatomic)NSString *goodsPrice;//商品单价

@property(assign,nonatomic)BOOL selectState;//是否选中状态

@property(assign,nonatomic)NSInteger goodsNum;//商品个数

@property(assign,nonatomic)NSInteger allNum;//全部个数

@property(assign,nonatomic)NSInteger remainedNum;//还需个数

-(instancetype)initWithDict:(NSDictionary *)dict;

GoodsInfoModel.m

-(instancetype)initWithDict:(NSDictionary *)dict

{

    if (self = [super init])

    {

        self.imageName = dict[@"imageName"];

        self.goodsTitle = dict[@"goodsTitle"];

        self.goodsPrice = dict[@"goodsPrice"];

        self.goodsNum = [dict[@"goodsNum"]integerValue];

        self.selectState = [dict[@"selectState"]boolValue];

        self.allNum=[dict[@"allNum"]integerValue];

        self.remainedNum=[dict[@"remainedNum"]integerValue];

    }

    return  self;

}

View :1.自定义的一个tableViewCell 2.自定义的一个结算View

ShopCartCell.h  :1.用于展示内容的各种控件　2.自定义了一个协议和代理　3.一个按钮触发事件

PS:英文使用了masonry 自动布局。将需要的一些头文件和宏定义放到pch文件中了。直接导入pch文件了

#import "GoodsInfoModel.h"

//添加代理，用于按钮加减的实现

@protocol ShopCartCellDelegate <NSObject>

-(void)btnClick:(UITableViewCell *)cell andFlag:(int)flag;

@end

@interface ShopCartCell : UITableViewCell

//增加一个view

@property (nonatomic,strong) UIView *mainView;

@property (nonatomic,strong) UIButton *selectBtn;

@property (nonatomic,strong) UIImageView *goodsImg;

@property (nonatomic,strong) UILabel *introductionLab;

@property (nonatomic,strong) UILabel *needLab;

@property (nonatomic,strong) UILabel *needNumLab;

@property (nonatomic,strong) UILabel *remainedLab;

@property (nonatomic,strong) UILabel *remianedNumLab;

@property (nonatomic,strong) UIButton *addBtn;

@property (nonatomic,strong) UITextField *goodsNumTF;

@property (nonatomic,strong) UIButton *minusBtn;

@property (nonatomic,strong) UILabel *winLab;

@property (nonatomic,strong) UILabel *winNumLab;

@property(assign,nonatomic)BOOL selectState;//选中状态

//赋值

-(void)addTheValue:(GoodsInfoModel *)goodsModel;

@property(assign,nonatomic)id<ShopCartCellDelegate>delegate;

ShopCartCell.m



　#import "SC.pch"


@interface ShopCartCell()

@end

@implementation ShopCartCell

- (void)awakeFromNib {

    // Initialization code

}

-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier

{

    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];

    if (self) {

//        self.layer.borderColor = [UIColor redColor].CGColor;

//        self.layer.borderWidth = 1;

        [self setSelectionStyle:UITableViewCellSelectionStyleNone];

//        self.backgroundColor=[UIColor colorWithRed:234/255.0 green:234/255.0 blue:234/255.0 alpha:0.5];

//        [self setSeparatorInset:UIEdgeInsetsMake(0, 60, 0, 0)];

        UIView *mainView=[[UIView alloc]init];

        [self.contentView addSubview:mainView];

        mainView.backgroundColor=[UIColor whiteColor];

        self.mainView=mainView;

        UIButton *selectBtn = [[UIButton alloc]init];

        [self.mainView addSubview:selectBtn];

        [selectBtn setImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal];

        [selectBtn setImage:[UIImage imageNamed:@"5"]forState:UIControlStateSelected];

        [selectBtn addTarget:self action:@selector(selectBtnAction:) forControlEvents:UIControlEventTouchUpInside];

        selectBtn.tag=13;

        self.selectBtn=selectBtn;

        UIImageView *goodsImg = [[UIImageView alloc]init];

        [self.mainView addSubview:goodsImg];

//        goodsImg.image = [UIImage imageNamed:@"4"];

        self.goodsImg=goodsImg;

        UILabel *introductionLab = [[UILabel alloc]init];

        [introductionLab setFont:[UIFont systemFontOfSize:17.0]];

        [self.mainView addSubview:introductionLab];

//        introductionLab.text=@"[111111111]";

        introductionLab.textColor=[UIColor grayColor];

        self.introductionLab=introductionLab;

        UILabel *needLab = [[UILabel alloc]init];

        [needLab setFont:[UIFont systemFontOfSize:13.0]];

        [self.mainView addSubview:needLab];

        needLab.text=@"总需:";

        needLab.textColor=[UIColor grayColor];

        self.needLab=needLab;

        UILabel *needNumLab = [[UILabel alloc]init];

        [needNumLab setFont:[UIFont systemFontOfSize:13.0]];

        [self.mainView addSubview:needNumLab];

//        needNumLab.text=@"1000";

        needNumLab.textColor=[UIColor grayColor];

        self.needNumLab=needNumLab;

        UILabel *remainedLab = [[UILabel alloc]init];

        [remainedLab setFont:[UIFont systemFontOfSize:13.0]];

        [self.mainView addSubview:remainedLab];

        remainedLab.textColor=[UIColor grayColor];

        remainedLab.text=@"剩余:";

        self.remainedLab=remainedLab;

        UILabel *remianedNumLab = [[UILabel alloc]init];

        [remianedNumLab setFont:[UIFont systemFontOfSize:13.0]];

        [self.mainView addSubview:remianedNumLab];

//        remianedNumLab.text=@"999";

        remianedNumLab.textColor=[UIColor redColor];

        self.remianedNumLab=remianedNumLab;

        UIButton *minusBtn = [[UIButton alloc]init];

        [self.mainView addSubview:minusBtn];

        [minusBtn setImage:[UIImage imageNamed:@"2"] forState:UIControlStateNormal];

        [minusBtn addTarget:self action:@selector(deleteBtnAction:) forControlEvents:UIControlEventTouchUpInside];

        minusBtn.tag = 11;

        self.minusBtn=minusBtn;

        UITextField *goodsNumTF = [[UITextField alloc]init];

        [self.mainView addSubview:goodsNumTF];

        goodsNumTF.textAlignment=NSTextAlignmentCenter;

//        goodsNumTF.text=@"10";

        goodsNumTF.backgroundColor=[UIColor grayColor];

        self.goodsNumTF=goodsNumTF;

        UIButton *addBtn = [[UIButton alloc]init];

        [self.mainView addSubview:addBtn];

        [addBtn setImage:[UIImage imageNamed:@"3"] forState:UIControlStateNormal];

        [addBtn addTarget:self action:@selector(addBtnAction:) forControlEvents:UIControlEventTouchUpInside];

        addBtn.tag = 12;

        self.addBtn=addBtn;

        UILabel *winLab = [[UILabel alloc]init];

        [winLab setFont:[UIFont systemFontOfSize:14.0]];

        [self.mainView addSubview:winLab];

        winLab.text=@"中奖概率";

        winLab.textColor=[UIColor grayColor];

        self.winLab=winLab;

        UILabel *winNumLab = [[UILabel alloc]init];

        [winNumLab setFont:[UIFont systemFontOfSize:14.0]];

        [self.mainView addSubview:winNumLab];

        winNumLab.text=@"100％";

        winNumLab.textColor=[UIColor grayColor];

        self.winNumLab=winNumLab;

    }

    return self;

}

/**

 *  给单元格赋值

 *

 *  @param goodsModel 里面存放各个控件需要的数值

 */

-(void)addTheValue:(GoodsInfoModel *)goodsModel

{

    self.goodsImg.image = [UIImage imageNamed:goodsModel.imageName];

    self.introductionLab.text = goodsModel.goodsTitle;

    self.needNumLab.text = [NSString stringWithFormat:@"%ld",(long)goodsModel.allNum];

    self.remianedNumLab.text = [NSString stringWithFormat:@"%ld",(long)goodsModel.remainedNum];

    self.goodsNumTF.text=[NSString stringWithFormat:@"%ld",(long)goodsModel.goodsNum];

    if (goodsModel.selectState){

        self.selectState = YES;

        [self.selectBtn setImage:[UIImage imageNamed:@"5"] forState:UIControlStateNormal];

    }else{

         self.selectState = NO;

        [self.selectBtn setImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal];

    }

}

//

-(void)selectBtnAction:(UIButton *)sender{

    [self.delegate btnClick:self andFlag:(int)sender.tag];

}

//

-(void)deleteBtnAction:(UIButton *)sender{

//    NSInteger goodsNum=[self.goodsNumTF.text integerValue];

//    if (goodsNum>1) {

//        goodsNum-=1;

//        self.goodsNumTF.text=[NSString stringWithFormat:@"%ld",(long)goodsNum];

//        NSInteger remianedNum=[self.remianedNumLab.text integerValue]+1;

//        self.remianedNumLab.text=[NSString stringWithFormat:@"%ld",(long)remianedNum];

//    }

    ////////

    //判断是否选中，选中才能点击

    if (self.selectState == YES)

    {

        //调用代理

        [self.delegate btnClick:self andFlag:(int)sender.tag];

    }

}

-(void)addBtnAction:(UIButton *)sender{

//    NSInteger goodsNum=[self.goodsNumTF.text integerValue];

//    if ([self.remianedNumLab.text integerValue]>0) {

//        goodsNum+=1;

//        self.goodsNumTF.text=[NSString stringWithFormat:@"%ld",(long)goodsNum];

//        NSInteger remianedNum=[self.remianedNumLab.text integerValue]-1;

//        self.remianedNumLab.text=[NSString stringWithFormat:@"%ld",(long)remianedNum];

//    }

    ///////

    if (self.selectState == YES)

    {

        //调用代理

        [self.delegate btnClick:self andFlag:(int)sender.tag];

    }

}

-(void)layoutSubviews

{

    [super layoutSubviews];

    WEAKSELF(weakSelf);

    [self.mainView mas_makeConstraints:^(MASConstraintMaker *make) {

//        make.center.mas_equalTo(weakSelf).offset(0);

        make.left.and.right.mas_equalTo(0);

        make.top.and.bottom.mas_equalTo(weakSelf).offset(10);

    }];

    [self.selectBtn mas_makeConstraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo(weakSelf.mainView.mas_centerY).offset(0);

        make.left.mas_equalTo(10);

        //make.height.and.width.mas_equalTo(17);

        make.height.mas_equalTo(17);

        make.width.mas_equalTo(17);

    }];

    [self.goodsImg mas_makeConstraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo(weakSelf.mainView.mas_centerY).offset(0);

        make.left.mas_equalTo(weakSelf.selectBtn.mas_right).offset(10);

        //make.height.and.width.mas_equalTo(17);

        make.height.mas_equalTo(70);

        make.width.mas_equalTo(70);

    }];

    [self.introductionLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.mainView.mas_top).offset(10);

        make.left.mas_equalTo(weakSelf.goodsImg.mas_right).offset(10);

        make.right.mas_equalTo(weakSelf.mas_right).offset(0);

        make.height.mas_equalTo(20);

    }];

    [self.needLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.introductionLab.mas_bottom).offset(10);

        make.left.mas_equalTo(weakSelf.introductionLab).offset(0);

        make.height.mas_equalTo(20);

        make.width.mas_equalTo(40);

    }];

    [self.needNumLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.needLab).offset(0);

        make.left.mas_equalTo(weakSelf.needLab.mas_right).offset(0);

        make.height.mas_equalTo(weakSelf.needLab.mas_height).offset(0);

        make.width.mas_equalTo(60);

    }];

    [self.remainedLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.needLab).offset(0);

        make.left.mas_equalTo(weakSelf.needNumLab.mas_right).offset(10);

        make.height.mas_equalTo(weakSelf.needLab.mas_height);

        make.width.mas_equalTo(40);

    }];

    [self.remianedNumLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.needLab).offset(0);

        make.left.mas_equalTo(weakSelf.remainedLab.mas_right).offset(0);

        make.height.mas_equalTo(weakSelf.needLab.mas_height);

        make.width.mas_equalTo(60);

    }];

    [self.minusBtn mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.needLab.mas_bottom).offset(10);

        make.left.mas_equalTo(weakSelf.introductionLab).offset(0);

        make.height.mas_equalTo(24);

        make.width.mas_equalTo(24);

    }];

    ////////////////

    [self.winLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.minusBtn).offset(0);

        make.right.mas_equalTo(weakSelf.mas_right).offset(-50);

        make.height.mas_equalTo(10);

        make.width.mas_equalTo(60);

    }];

    [self.winNumLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.winLab.mas_bottom).offset(5);

        make.right.mas_equalTo(weakSelf.winLab).offset(0);

        make.height.mas_equalTo(weakSelf.winLab);

        make.width.mas_equalTo(weakSelf.winLab);

    }];

    [self.addBtn mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.minusBtn).offset(0);

        make.right.mas_equalTo(weakSelf.winLab.mas_left).offset(-20);

        make.height.mas_equalTo(weakSelf.minusBtn);

        make.width.mas_equalTo(weakSelf.minusBtn);

    }];

    [self.goodsNumTF mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.minusBtn).offset(0);

        make.right.mas_equalTo(weakSelf.addBtn.mas_left).offset(-10);

        make.left.mas_equalTo(weakSelf.minusBtn.mas_right).offset(10);

        make.height.mas_equalTo(weakSelf.minusBtn);

    }];

}




SettlementView.h　　一个结算的view ,用于显示选择的个数和金额，以及里那个按钮：全选和结算按钮。




@interface SettlementView : UIView

@property(nonatomic,strong)UIButton*allSelecteBtn;

@property(nonatomic,strong)UILabel*allSelecteLab;//全选

@property(nonatomic,strong)UILabel*sumLab;//总价

@property(nonatomic,strong)UILabel*goodsNumLab;//商品数

@property(nonatomic,strong)UIButton *statementBtn;//结算

@end




SettlementView.m　




#import "SC.pch"

@implementation SettlementView

-(instancetype)initWithFrame:(CGRect)frame{

    self=[super initWithFrame:frame];

    if (self){

        [self setupUI];

    }

    return self;

}

-(void)setupUI{

    self.backgroundColor=[UIColor whiteColor];

    self.layer.borderColor = [UIColor grayColor].CGColor;

    self.layer.borderWidth = 0.5;

    //全选按钮

    //self.allSelecteBtn

    UIButton *allSelecteBtn=[[UIButton alloc]init];

    [self addSubview:allSelecteBtn];

    [allSelecteBtn addTarget:self action:@selector(selectBtnAction:) forControlEvents:UIControlEventTouchUpInside];

    _allSelecteBtn=allSelecteBtn;

    [self.allSelecteBtn setImage:[UIImage imageNamed:@"1"] forState:UIControlStateNormal];

//    [self.allSelecteBtn setImage:[UIImage imageNamed:@"5"] forState:UIControlStateSelected];

    self.allSelecteLab=[[UILabel alloc]init];

    [self addSubview:self.allSelecteLab];

    self.allSelecteLab.text=@"全选";

    self.allSelecteLab.font=[UIFont systemFontOfSize:14.0];

    self.sumLab=[[UILabel alloc]init];

    [self addSubview:self.sumLab];

    self.sumLab.text=@"0　元";

    self.sumLab.textColor=[UIColor redColor];

    self.allSelecteLab.font=[UIFont systemFontOfSize:16.0];

    self.goodsNumLab=[[UILabel alloc]init];

    [self addSubview:self.goodsNumLab];

    self.goodsNumLab.text=@"共计：0　件商品";

    self.goodsNumLab.font=[UIFont systemFontOfSize:12.0];

    //全选按钮

    self.statementBtn=[[UIButton alloc]init];

    [self addSubview:self.statementBtn];

    [self.statementBtn setBackgroundColor:[UIColor redColor]];

    [self.statementBtn setTitle:@"结算" forState:UIControlStateNormal];

}

-(void)selectBtnAction:(UIButton *)sender{

    //[self.delegate btnClick:self andFlag:(int)sender.tag];

}

- (void)layoutSubviews

{

    [super layoutSubviews];

    WEAKSELF(weakSelf);

    [self.allSelecteBtn mas_makeConstraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo(weakSelf.mas_centerY).offset(0);

        make.left.mas_equalTo(weakSelf).offset(10);

        make.height.mas_equalTo(17);

        make.width.mas_equalTo(17);

    }];

    [self.allSelecteLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo(weakSelf.mas_centerY).offset(0);

        make.left.mas_equalTo(weakSelf.allSelecteBtn.mas_right).offset(5);

        make.width.mas_equalTo(40);

        make.height.mas_equalTo(40);

    }];

    [self.sumLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(5);

        make.left.mas_equalTo(weakSelf.allSelecteLab.mas_right).offset(20);

        make.height.mas_equalTo(20);

        make.width.mas_equalTo(100);

    }];

    [self.goodsNumLab mas_makeConstraints:^(MASConstraintMaker *make) {

        make.top.mas_equalTo(weakSelf.sumLab.mas_bottom).offset(5);

        make.left.mas_equalTo(weakSelf.sumLab);

        make.height.mas_equalTo(weakSelf.sumLab);

        make.width.mas_equalTo(weakSelf.sumLab);

    }];

    [self.statementBtn mas_makeConstraints:^(MASConstraintMaker *make) {

        make.centerY.mas_equalTo(weakSelf.mas_centerY).offset(0);

        make.right.mas_equalTo(weakSelf.mas_right).offset(-5);

        make.height.mas_equalTo(30);

        make.width.mas_equalTo(100);

    }];

}




Controller:


ShopCartViewController.h


ShopCartViewController.m　　


项目最核心：选择商品,添加，减少等，以及在这个操作中结算View的变化。




#import "ShopCartViewController.h"

#import "ShopCartCell.h"

#import "SC.pch"

#import "SettlementView.h"

#import "GoodsInfoModel.h"

#import "StatementViewController.h"

@interface ShopCartViewController ()<UITableViewDataSource,UITableViewDelegate,ShopCartCellDelegate>

@property(nonatomic,strong)UITableView *goodsTableView;

@property(nonatomic,strong)SettlementView *settlementView;

@property(nonatomic,assign)NSInteger allPrice;

@property(nonatomic,assign)NSInteger goodsNum;;

@property(nonatomic,strong)NSMutableArray *infoArr;;

@end

@implementation ShopCartViewController

- (void)viewDidLoad {

    [super viewDidLoad];

//    self.view.backgroundColor=[UIColor colorWithRed:234/255.0 green:234/255.0 blue:234/255.0 alpha:1];

    [self setInfo];

    [self setGoodsTableView];

    [self setupSettlement];

}

-(void)setInfo{

    self.allPrice=0;

    self.goodsNum = 0;

    self.infoArr = [[NSMutableArray alloc]init];

    /**

     *  初始化一个数组，数组里面放字典。字典里面放的是单元格需要展示的数据

     */

    for (int i = 0; i<7; i++)

    {

        NSMutableDictionary *infoDict = [[NSMutableDictionary alloc]init];

        [infoDict setValue:@"4.png" forKey:@"imageName"];

        [infoDict setValue:@"这是商品标题" forKey:@"goodsTitle"];

//        [infoDict setValue:@"2000" forKey:@"goodsPrice"];

        [infoDict setValue:[NSNumber numberWithBool:NO] forKey:@"selectState"];

        [infoDict setValue:[NSNumber numberWithInt:1] forKey:@"goodsNum"];

        /*

         @property(assign,nonatomic)int allNum;

         @property(assign,nonatomic)int remainedNum;

         */

        [infoDict setValue:[NSNumber numberWithInt:1000] forKey:@"allNum"];

        [infoDict setValue:[NSNumber numberWithInt:999] forKey:@"remainedNum"];

        //封装数据模型

        GoodsInfoModel *goodsModel = [[GoodsInfoModel alloc]initWithDict:infoDict];

        //将数据模型放入数组中

        [self.infoArr addObject:goodsModel];

    }

}

-(void)setupSettlement{

    SettlementView *settlementView=[[SettlementView alloc]initWithFrame:CGRectMake(0, kScreen_Height-100, kScreen_Width, 60)];

    [settlementView.statementBtn addTarget:self action:@selector(goStatement) forControlEvents:UIControlEventTouchUpInside];

    [settlementView.allSelecteBtn addTarget:self action:@selector(goAllSelect:) forControlEvents:UIControlEventTouchUpInside];

    [self.view addSubview:settlementView];

    self.settlementView=settlementView;

}

-(void)setGoodsTableView{

    UITableView *goodsTableView=[[UITableView alloc]initWithFrame:CGRectMake(0, 0, kScreen_Width, kScreen_Height-20)];//0, 44, kScreen_Width, kScreen_Height-20)

    [self.view addSubview:goodsTableView];

    goodsTableView.showsHorizontalScrollIndicator=NO;

    goodsTableView.showsVerticalScrollIndicator=NO;

//    goodsTableView.backgroundColor=[UIColor colorWithRed:234/255.0 green:234/255.0 blue:234/255.0 alpha:1];

    goodsTableView.backgroundColor=[UIColor redColor];

    goodsTableView.delegate=self;

    goodsTableView.dataSource=self;

    [goodsTableView registerClass:[ShopCartCell class] forCellReuseIdentifier:@"SCCell"];

//    [goodsTableView registerNib:[UINib nibWithNibName:@"ShopCartTableCell" bundle:nil] forCellReuseIdentifier:@"SCCell"];

    goodsTableView.separatorStyle = UITableViewCellSeparatorStyleNone;

    self.goodsTableView=goodsTableView;

}

#pragma mark-------

#pragma mark--------tableViewDelegate

-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    static NSString *SCCell =  @"SCCell";

    ShopCartCell *cell=[tableView dequeueReusableCellWithIdentifier:SCCell forIndexPath:indexPath];

    if (!cell){

        cell=[[ShopCartCell alloc]initWithStyle:UITableViewCellStyleDefault  reuseIdentifier:SCCell];

    }

    cell.delegate = self;

    [cell addTheValue:self.infoArr[indexPath.row]];

    return cell;

}

-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{

    return 120;

}

-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    return self.infoArr.count;

}

#pragma mark -- 实现加减按钮点击代理事件

/**

 *  实现加减按钮点击代理事件

 *

 *  @param cell 当前单元格

 *  @param flag 按钮标识，11 为减按钮，12为加按钮

 */

-(void)btnClick:(UITableViewCell *)cell andFlag:(int)flag{

    NSIndexPath *index = [self.goodsTableView indexPathForCell:cell];

    switch (flag) {

        case 11:

        {

            //做减法

            //先获取到当期行数据源内容，改变数据源内容，刷新表格

            GoodsInfoModel *model = self.infoArr[index.row];

            if (model.goodsNum > 1)

            {

                model.goodsNum --;

                model.remainedNum++;

            }

           // [self.goodsTableView reloadRowsAtIndexPaths:@[index] withRowAnimation:UITableViewRowAnimationAutomatic];

        }

            break;

        case 12:

        {

            //做加法

            GoodsInfoModel *model = self.infoArr[index.row];

            if (model.remainedNum>0) {

                model.remainedNum --;

                model.goodsNum++;

            }

            //[self.goodsTableView reloadRowsAtIndexPaths:@[index] withRowAnimation:UITableViewRowAnimationAutomatic];

        }

            break;

        case 13:

        {    //先获取到当期行数据源内容，改变数据源内容，刷新表格

            GoodsInfoModel *model = self.infoArr[index.row];

            if (model.selectState)            {

                model.selectState = NO;

            }else {

                model.selectState = YES;

            }

            //刷新当前行

            //[self.goodsTableView reloadRowsAtIndexPaths:@[index] withRowAnimation:UITableViewRowAnimationAutomatic];

        }

        default:

            break;

    }

    //刷新表格

    [self.goodsTableView reloadData];

    //计算总价

    [self totalPrice];

}

#pragma mark -- 计算价格

-(void)totalPrice

{

    //遍历整个数据源，然后判断如果是选中的商品，就计算价格（单价 * 商品数量）

    for ( int i =0; i<self.infoArr.count; i++)    {

        GoodsInfoModel *model = [self.infoArr objectAtIndex:i];

        if (model.selectState)

        {

            self.allPrice +=  model.goodsNum ;//[model.goodsPrice intValue];

            self.goodsNum +=model.goodsNum;

        }

    }

    //给总价文本赋值

    self.settlementView.sumLab.text = [NSString stringWithFormat:@"%ld 元",(long)self.allPrice];

    self.settlementView.goodsNumLab.text=[NSString stringWithFormat:@"共计：%ld　件商品 ",(long)self.goodsNum];

    //每次算完要重置为0，因为每次的都是全部循环算一遍

    self.allPrice = 0;

    self.goodsNum = 0;

}

//结算

-(void)goStatement{

    NSInteger total=[self.settlementView.sumLab.text integerValue];

    if (total>0) {

        StatementViewController *statementVC=[[StatementViewController alloc]init];

        statementVC.price=total;

        [self.navigationController pushViewController:statementVC animated:YES];

    }

}

//全选

-(void)goAllSelect:(UIButton *)sender{

    //判断是否选中，是改成否，否改成是，改变图片状态

    sender.tag = !sender.tag;

    if (sender.tag)    {

        [sender setImage:[UIImage imageNamed:@"5.png"] forState:UIControlStateNormal];

    }else{

        [sender setImage:[UIImage imageNamed:@"1.png"] forState:UIControlStateNormal];

    }

    //改变单元格选中状态

    for (int i=0; i<self.infoArr.count; i++)

    {

        GoodsInfoModel *model = [self.infoArr objectAtIndex:i];

        model.selectState = sender.tag;

    }

    //计算价格

    [self totalPrice];

    //刷新表格

    [self.goodsTableView reloadData];

}




StatementViewController.h　结算试图




@property(nonatomic,assign)NSInteger price;//总价




StatementViewController.m




#import "StatementViewController.h"

#import "SC.pch"

@interface StatementViewController ()

@end

@implementation StatementViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    self.view.backgroundColor=[UIColor whiteColor];

    UILabel *allPrice=[[UILabel alloc]initWithFrame:CGRectMake(100, 100, 100, 160)];

    allPrice.text= [NSString stringWithFormat:@"-----%ld-------",(long)self.price];

    [self.view addSubview:allPrice];

}


												


											
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