iOS实现电商购物车界面示例

 //创建窗口
self.window = [[UIWindow alloc]initWithFrame:[UIScreen mainScreen].bounds];
self.window.backgroundColor = [UIColor whiteColor];

//创建一个导航控制器，成为根视图

UINavigationController *nav = [[UINavigationController alloc]initWithRootViewController:[ViewController new]];
self.window.rootViewController = nav;

//显示窗口
[self.window makeKeyAndVisible];

 self.title = @"购物车";
 //设置标题的属性样式等
[self.navigationController.navigationBar setTitleTextAttributes:@{NSForegroundColorAttributeName : [UIColor blackColor],NSFontAttributeName:[UIFont systemFontOfSize:23.0f]}];

@interface GoodsInfoModel : NSObject
@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)int goodsNum;//商品个数

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

@end
GoodsInfoModel.m 中
-(instancetype)initWithDict:(NSDictionary *)dict
{
if (self = [super init])
{
 self.imageName = dict[@"imageName"];
 self.goodsTitle = dict[@"goodsTitle"];
 self.goodsPrice = dict[@"goodsPrice"];
 self.goodsNum = [dict[@"goodsNum"]intValue];
 self.selectState = [dict[@"selectState"]boolValue];

}

return self;

}

@interface ViewController ()<UITableViewDataSource,UITableViewDelegate,MyCustomCellDelegate>
{
 UITableView *_MyTableView;
 float allPrice;
 NSMutableArray *infoArr;
}

@property(strong,nonatomic)UIButton *allSelectBtn;
@property(strong,nonatomic)UILabel *allPriceLab;

@end

---------------------------------------------------------------
//初始化数据
allPrice = 0.0;
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:@"img6.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"];


 //封装数据模型

 GoodsInfoModel *goodsModel = [[GoodsInfoModel alloc]initWithDict:infoDict];
 //将数据模型放入数组中

 [infoArr addObject:goodsModel];

}

/* 创建表格，并设置代理 /
_MyTableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) style:UITableViewStylePlain];
_MyTableView.dataSource = self;
_MyTableView.delegate = self;

//给表格添加一个尾部视图

_MyTableView.tableFooterView = [self creatFootView];

[self.view addSubview:_MyTableView];

/* * 创建表格尾部视图 * * @return 返回一个UIView 对象视图，作为表格尾部视图/
-(UIView *)creatFootView{
UIView *footView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, 150)];
//添加一个全选文本框标签
UILabel *lab = [[UILabel alloc]initWithFrame:CGRectMake(self.view.frame.size.width - 150, 10, 50, 30)];
lab.text = @"全选";
[footView addSubview:lab];

//添加全选图片按钮
_allSelectBtn = [UIButton buttonWithType:UIButtonTypeCustom];
_allSelectBtn.frame = CGRectMake(self.view.frame.size.width- 100, 10, 30, 30);
[_allSelectBtn setImage:[UIImage imageNamed:@"复选框-未选中"] forState:UIControlStateNormal];
[_allSelectBtn addTarget:self action:@selector(selectBtnClick:) forControlEvents:UIControlEventTouchUpInside];
[footView addSubview:_allSelectBtn];

//添加小结文本框
UILabel *lab2 = [[UILabel alloc]initWithFrame:CGRectMake(self.view.frame.size.width - 150, 40, 60, 30)];
lab2.textColor = [UIColor redColor];
lab2.text = @"小结：";
[footView addSubview:lab2];

//添加一个总价格文本框，用于显示总价
_allPriceLab = [[UILabel alloc]initWithFrame:CGRectMake(self.view.frame.size.width - 100, 40, 100, 30)];
_allPriceLab.textColor = [UIColor redColor];
_allPriceLab.text = @"0.0";
[footView addSubview:_allPriceLab];

//添加一个结算按钮
UIButton *settlementBtn = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[settlementBtn setTitle:@"去结算" forState:UIControlStateNormal];
[settlementBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
settlementBtn.frame = CGRectMake(10, 80, self.view.frame.size.width - 20, 30);
settlementBtn.backgroundColor = [UIColor blueColor];
[footView addSubview:settlementBtn];

return footView;
}

#import <UIKit/UIKit.h>
#import "GoodsInfoModel.h"

//添加代理，用于按钮加减的实现
@protocol MyCustomCellDelegate <NSObject>

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

@end

@interface MyCustomCell : UITableViewCell

@property(strong,nonatomic)UIImageView *goodsImgV;//商品图片
@property(strong,nonatomic)UILabel *goodsTitleLab;//商品标题
@property(strong,nonatomic)UILabel *priceTitleLab;//价格标签
@property(strong,nonatomic)UILabel *priceLab;//具体价格
@property(strong,nonatomic)UILabel *goodsNumLab;//购买数量标签
@property(strong,nonatomic)UILabel *numCountLab;//购买商品的数量
@property(strong,nonatomic)UIButton *addBtn;//添加商品数量
@property(strong,nonatomic)UIButton *deleteBtn;//删除商品数量
@property(strong,nonatomic)UIButton *isSelectBtn;//是否选中按钮
@property(strong,nonatomic)UIImageView *isSelectImg;//是否选中图片
@property(assign,nonatomic)BOOL selectState;//选中状态
@property(assign,nonatomic)id<MyCustomCellDelegate>delegate;


//赋值
-(void)addTheValue:(GoodsInfoModel *)goodsModel;
MyCustomCell.m :先写一个宏定义宽度。#define WIDTH ([UIScreen mainScreen].bounds.size.width)
-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])
{
 //布局界面
 UIView * bgView = [[UIView alloc]initWithFrame:CGRectMake(5, 5, WIDTH-10, 95)];
 bgView.backgroundColor = [UIColor whiteColor];
 //添加商品图片
 _goodsImgV = [[UIImageView alloc]initWithFrame:CGRectMake(5, 10, 80, 80)];
 _goodsImgV.backgroundColor = [UIColor greenColor];
 [bgView addSubview:_goodsImgV];
 //添加商品标题
 _goodsTitleLab = [[UILabel alloc]initWithFrame:CGRectMake(90, 5, 200, 30)];
 _goodsTitleLab.text = @"afadsfa fa";
 _goodsTitleLab.backgroundColor = [UIColor clearColor];
 [bgView addSubview:_goodsTitleLab];
 //促销价
 _priceTitleLab = [[UILabel alloc]initWithFrame:CGRectMake(90, 35, 70, 30)];
 _priceTitleLab.text = @"促销价:";
 _priceTitleLab.backgroundColor = [UIColor clearColor];
 [bgView addSubview:_priceTitleLab];
 //商品价格
 _priceLab = [[UILabel alloc]initWithFrame:CGRectMake(160, 35, 100, 30)];
 _priceLab.text = @"1990";
 _priceLab.textColor = [UIColor redColor];
 [bgView addSubview:_priceLab];
 //购买数量
 _goodsNumLab = [[UILabel alloc]initWithFrame:CGRectMake(90, 65, 90, 30)];
 _goodsNumLab.text = @"购买数量：";
 [bgView addSubview:_goodsNumLab];
 //减按钮
 _deleteBtn = [UIButton buttonWithType:UIButtonTypeCustom];
 _deleteBtn.frame = CGRectMake(180, 65, 30, 30);
 [_deleteBtn setImage:[UIImage imageNamed:@"按钮-.png"] forState:UIControlStateNormal];
 [_deleteBtn addTarget:self action:@selector(deleteBtnAction:) forControlEvents:UIControlEventTouchUpInside];
 _deleteBtn.tag = 11;
 [bgView addSubview:_deleteBtn];
 //购买商品的数量
 _numCountLab = [[UILabel alloc]initWithFrame:CGRectMake(210, 65, 50, 30)];
 _numCountLab.textAlignment = NSTextAlignmentCenter;
 [bgView addSubview:_numCountLab];
 //加按钮
 _addBtn = [UIButton buttonWithType:UIButtonTypeCustom];
 _addBtn.frame = CGRectMake(260, 65, 30, 30);
 [_addBtn setImage:[UIImage imageNamed:@"按钮+.png"] forState:UIControlStateNormal];
 [_addBtn addTarget:self action:@selector(addBtnAction:) forControlEvents:UIControlEventTouchUpInside];
 _addBtn.tag = 12;
 [bgView addSubview:_addBtn];
 //是否选中图片
 _isSelectImg = [[UIImageView alloc]initWithFrame:CGRectMake(WIDTH - 50, 10, 30, 30)];
 [bgView addSubview:_isSelectImg];
 [self addSubview:bgView];

}

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
{
_goodsImgV.image = [UIImage imageNamed:goodsModel.imageName];
_goodsTitleLab.text = goodsModel.goodsTitle;
_priceLab.text = goodsModel.goodsPrice;
_numCountLab.text = [NSString stringWithFormat:@"%d",goodsModel.goodsNum];

if (goodsModel.selectState)
{
 _selectState = YES;
 _isSelectImg.image = [UIImage imageNamed:@"复选框-选中"];

}else{

 _selectState = NO;
 _isSelectImg.image = [UIImage imageNamed:@"复选框-未选中"];

}

}

/**
 * 点击减按钮实现数量的减少
 *
 * @param sender 减按钮
 */
-(void)deleteBtnAction:(UIButton *)sender
{
//判断是否选中，选中才能点击

if (_selectState == YES)

{
 //调用代理
 [self.delegate btnClick:self andFlag:(int)sender.tag];
}


}
/**
 * 点击加按钮实现数量的增加
 *
 * @param sender 加按钮
 */
-(void)addBtnAction:(UIButton *)sender
{
//判断是否选中，选中才能点击

if (_selectState == YES)
{
 //调用代理
 [self.delegate btnClick:self andFlag:(int)sender.tag];
}


}

//返回单元格个数
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection: (NSInteger)section
{
 return infoArr.count;
}
//定制单元格内容
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
 static NSString *identify = @"indentify";
 MyCustomCell *cell = [tableView dequeueReusableCellWithIdentifier:identify];
 if (!cell)
 {
 cell = [[MyCustomCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identify];
 cell.delegate = self;
 }
 //调用方法，给单元格赋值
 [cell addTheValue:infoArr[indexPath.row]];
return cell;
}

//返回单元格的高度
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
 return 120;
}

//单元格选中事件
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
/**
 * 判断当期是否为选中状态，如果选中状态点击则更改成未选中，如果未选中点击则更改成选中状态
 */
GoodsInfoModel *model = infoArr[indexPath.row];
if (model.selectState)
{
 model.selectState = NO;

}
else
{
 model.selectState = YES;
}
//刷新整个表格

// [_MyTableView reloadData];

//刷新当前行
[_MyTableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];


[self totalPrice];

}

#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 = [_MyTableView 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 = infoArr[index.row];
 if (model.goodsNum > 1)
 {
  model.goodsNum --;
 }
 }
 break;
 case 12:

 {
 //做加法
 GoodsInfoModel *model = infoArr[index.row];

 model.goodsNum ++;

 }

 break;

 default:

 break;

}
//刷新表格
[_MyTableView reloadData];

//计算总价
[self totalPrice];

}

/**
* 全选按钮事件
*
* @param sender 全选按钮
*/
-(void)selectBtnClick:(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:@"复选框-选中.png"] forState:UIControlStateNormal];

}else{
 [sender setImage:[UIImage imageNamed:@"复选框-未选中.png"] forState:UIControlStateNormal];
}
//改变单元格选中状态
for (int i=0; i<infoArr.count; i++)
{
 GoodsInfoModel *model = [infoArr objectAtIndex:i];
 model.selectState = sender.tag;

}
//计算价格
[self totalPrice];
//刷新表格
[_MyTableView reloadData];

}

#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<infoArr.count; i++)
{
 GoodsInfoModel *model = [infoArr objectAtIndex:i];
 if (model.selectState)
 {
 allPrice = allPrice + model.goodsNum *[model.goodsPrice intValue];
 }
}
//给总价文本赋值
_allPriceLab.text = [NSString stringWithFormat:@"%.2f",allPrice];
NSLog(@"%f",allPrice);

//每次算完要重置为0，因为每次的都是全部循环算一遍
allPrice = 0.0;
}