JSShopCartModule

开始之前你需要了解的

配置CocoaPods

 gem install cocoapods   ##使用RVM安装的Ruby不需要sudo

配置ReactiveCocoa

然后在你的Podfile添加一下代码

platform :ios, '8.0'
use_frameworks!

target '你的项目工程名' do
   pod 'ReactiveObjC'
end

最后输入命令安装

pod install

另外常用的pod 命令

pod install --verbose --no-repo-update       ##安装不更新的
pod update --verbose --no-repo-update        ##更新需要更新的

打开你的项目工程名.xcworkspace 即可~

RAC在此我就不仔细介绍了,先推荐几遍文章:

Mattt Thompson写的ReactiveCocoa

Ash Furrow写的 Getting Started with ReactiveCocoa

了解MVVM

Google了看几篇有关的文章

Basic MVVM with ReactiveCocoa

MVVM-IOS-Example

MVVM 介绍译朱宏旭

简单的介绍一下:

M:model放一些数据模型

V:view视图

V:viewcontroller控制器

VM:viewmodel主要做处理逻辑和处理数据

开始着手代码

项目演示

<<<<<<< HEAD

项目搭建框架

整体文件目录按照模块分一下子文件

ViewController :
	ViewController				##加载视图事件监听等等
Model :
	model						##基本数据模型
View : 
	cell						##cell
	numbercount					##封装加减控件
	header						##店铺之类
	footer						##小结
	cartbar					    ##封装购物车底部view
ViewModel :
	service						##抽离tableview的datasource和delegate
	viewmodel				    ##处理主要的逻辑和数据

viewmodel类方法属性解析

获取数据方法

1.循环20个从0到5之间随机取数组里取值加到最终的cartData数组里 2.店铺选择shopSelectArray默认NO状态 3.统计总共购物车数量cartGoodsCount

- (void)getData{
    //数据个数
    NSInteger allCount = 20;
    NSInteger allGoodsCount = 0;
    NSMutableArray *storeArray = [NSMutableArray arrayWithCapacity:allCount];
    NSMutableArray *shopSelectAarry = [NSMutableArray arrayWithCapacity:allCount];
    //创造店铺数据
    for (int i = 0; i<allCount; i++) {
        //创造店铺下商品数据
        NSInteger goodsCount = [_shopGoodsCount[self.random] intValue];
        NSMutableArray *goodsArray = [NSMutableArray arrayWithCapacity:goodsCount];
        for (int x = 0; x<goodsCount; x++) {
            JSCartModel *cartModel = [[JSCartModel alloc] init];
            cartModel.p_id         = @"122115465400";
            cartModel.p_price      = [_goodsPriceArray[self.random] floatValue];
            cartModel.p_name       = [NSString stringWithFormat:@"%@这是一个很长很长的名字呀呀呀呀呀呀",@(x)];
            cartModel.p_stock      = 22;
            cartModel.p_imageUrl   = _goodsPicArray[self.random];
            cartModel.p_quantity   = [_goodsQuantityArray[self.random] integerValue];
            [goodsArray addObject:cartModel];
            allGoodsCount++;
        }
        [storeArray addObject:goodsArray];
        [shopSelectAarry addObject:@(NO)];
    }
    self.cartData = storeArray;
    self.shopSelectArray = shopSelectAarry;
    self.cartGoodsCount = allGoodsCount;
}

获取当前选中价格总和方法

对cartData数组转信号流然后map自定义需求return,期间自定义需求参数value 再次转信号流经过filter筛选未选中使isSelectAll为NO,然后经过map自定义需求使model.p_quantity*model.p_price得到的商品总价返回,最终return得到商品总价数组pricesArray.

快速遍历pricesArray得出总价allPrices

- (float)getAllPrices{
    
    __block float allPrices   = 0;
    NSInteger shopCount       = self.cartData.count;
    NSInteger shopSelectCount = self.shopSelectArray.count;
    if (shopSelectCount == shopCount && shopCount!=0) {
        self.isSelectAll = YES;
    }
    NSArray *pricesArray = [[[self.cartData rac_sequence] map:^id(NSMutableArray *value) {
        return [[[value rac_sequence] filter:^BOOL(JSCartModel *model) {
            if (!model.isSelect) {
                self.isSelectAll = NO;
            }
            return model.isSelect;
        }] map:^id(JSCartModel *model) {
            return @(model.p_quantity*model.p_price);
        }];
    }] array];
    for (NSArray *priceA in pricesArray) {
        for (NSNumber *price in priceA) {
            allPrices += price.floatValue;
        }
    }
    
    return allPrices;
}

全选yes or not

shopSelectArray转流map定义需求isSelect为YES的对象然后return 成可变数组.

cartData转流map定义需求,对其参数value转流map定义需求KVC使model的isSelect属性为YES,再次计算记录总价allPrices.return再return成可变数组.

- (void)selectAll:(BOOL)isSelect{
    
     __block float allPrices = 0;
    
    self.shopSelectArray = [[[[self.shopSelectArray rac_sequence] map:^id(NSNumber *value) {
        return @(isSelect);
    }] array] mutableCopy];
    self.cartData = [[[[self.cartData rac_sequence] map:^id(NSMutableArray *value) {
        return  [[[[value rac_sequence] map:^id(JSCartModel *model) {
                [model setValue:@(isSelect) forKey:@"isSelect"];
            if (model.isSelect) {
                allPrices += model.p_quantity*model.p_price;
            }
            return model;
        }] array] mutableCopy];
    }] array] mutableCopy];
    self.allPrices = allPrices;
    [self.cartTableView reloadData];
}

单行选择处理方法

KVC设置model的isSelect为YES,做店铺下商品选中满判断

- (void)rowSelect:(BOOL)isSelect IndexPath:(NSIndexPath *)indexPath{
    
    NSInteger section          = indexPath.section;
    NSInteger row              = indexPath.row;

    NSMutableArray *goodsArray = self.cartData[section];
    NSInteger shopCount        = goodsArray.count;
    JSCartModel *model         = goodsArray[row];
    [model setValue:@(isSelect) forKey:@"isSelect"];
    //判断是都到达足够数量
    NSInteger isSelectShopCount = 0;
    for (JSCartModel *model in goodsArray) {
        if (model.isSelect) {
            isSelectShopCount++;
        }
    }
    [self.shopSelectArray replaceObjectAtIndex:section withObject:@(isSelectShopCount==shopCount?YES:NO)];
    
    [self.cartTableView reloadSections:[NSIndexSet indexSetWithIndex:section] withRowAnimation:UITableViewRowAnimationNone];
    
    /*重新计算价格*/
    self.allPrices = [self getAllPrices];
}

单行数量处理方法

KVC处理model.再次调用getAllPrices方法计算总价

- (void)rowChangeQuantity:(NSInteger)quantity indexPath:(NSIndexPath *)indexPath{
    
    NSInteger section  = indexPath.section;
    NSInteger row      = indexPath.row;

    JSCartModel *model = self.cartData[section][row];

    [model setValue:@(quantity) forKey:@"p_quantity"];
    
    [self.cartTableView reloadSections:[NSIndexSet indexSetWithIndex:section] withRowAnimation:UITableViewRowAnimationNone];
    
    /*重新计算价格*/
    self.allPrices = [self getAllPrices];
}

左滑删除商品

数组删除,做店铺下商品删除完判断处理

- (void)deleteGoodsBySingleSlide:(NSIndexPath *)path{
    
    NSInteger section = path.section;
    NSInteger row     = path.row;
    
    NSMutableArray *shopArray = self.cartData[section];
    [shopArray removeObjectAtIndex:row];
    if (shopArray.count == 0) {
        /*1 删除数据*/
        [self.cartData removeObjectAtIndex:section];
        /*2 删除 shopSelectArray*/
        [self.shopSelectArray removeObjectAtIndex:section];
        [self.cartTableView reloadData];
    } else {
        [self.cartTableView reloadSections:[NSIndexSet indexSetWithIndex:section] withRowAnimation:UITableViewRowAnimationNone];
    }
    self.cartGoodsCount-=1;
    /*重新计算价格*/
    self.allPrices = [self getAllPrices];
}

删除选中处理方法

创建可变集合shopSelectIndex,遍历cartData,遍历shopArray,取得选中的index2加到selectIndexSet中,做店铺count和选中商品相等判断,index1加到shopSelectIndex中,cartGoodsCount做递减处理,然后依次shopArray做删除操作,cartData在循环外删除操作,shopSelectArray在循环外删除操作,价格为0,重新计算价格

- (void)deleteGoodsBySelect{
 
    /*1 删除数据*/
    NSInteger index1 = -1;
    NSMutableIndexSet *shopSelectIndex = [NSMutableIndexSet indexSet];
    for (NSMutableArray *shopArray in self.cartData) {
        index1++;
        
        NSInteger index2 = -1;
        NSMutableIndexSet *selectIndexSet = [NSMutableIndexSet indexSet];
        for (JSCartModel *model in shopArray) {
            index2++;
            if (model.isSelect) {
                [selectIndexSet addIndex:index2];
            }
        }
        NSInteger shopCount = shopArray.count;
        NSInteger selectCount = selectIndexSet.count;
        if (selectCount == shopCount) {
            [shopSelectIndex addIndex:index1];
            self.cartGoodsCount-=selectCount;
        }
        [shopArray removeObjectsAtIndexes:selectIndexSet];
    }
    [self.cartData removeObjectsAtIndexes:shopSelectIndex];
    /*2 删除 shopSelectArray*/
    [self.shopSelectArray removeObjectsAtIndexes:shopSelectIndex];
    [self.cartTableView reloadData];
    /*3 carbar 恢复默认*/
    self.allPrices = 0;
    /*重新计算价格*/
    self.allPrices = [self getAllPrices];
}

VC做监听观察处理

全选

 [[self.cartBar.selectAllButton rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(UIButton *x) {
        x.selected = !x.selected;
        [self.viewModel selectAll:x.selected];
    }];

删除

[[self.cartBar.deleteButton rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(UIButton *x) {
    [self.viewModel deleteGoodsBySelect];
}];

结算

[[self.cartBar.balanceButton rac_signalForControlEvents:UIControlEventTouchUpInside] subscribeNext:^(UIButton *x) {
        
    }];

观察价格属性

WEAK
[RACObserve(self.viewModel, allPrices) subscribeNext:^(NSNumber *x) {
    STRONG
    self.cartBar.money = x.floatValue;
}];

全选状态

RAC(self.cartBar.selectAllButton,selected) = RACObserve(self.viewModel, 	isSelectAll);

title购物车数量

[RACObserve(self.viewModel, cartGoodsCount) subscribeNext:^(NSNumber *x) {
   STRONG
    if(x.integerValue == 0){
        self.title = [NSString stringWithFormat:@"购物车"];
    } else {
        self.title = [NSString stringWithFormat:@"购物车(%@)",x];
    }
    
}];

总结

主要的方法我都一一讲了很清楚,具体的怎么调用,可以到service里,cell里,控件里看,写了这么一大堆,如果你还有什么不懂,或者有更好的建议请留言,或者到我的github上issue我,如果我写的对你有些帮助,请给予辛劳的博主一些打赏,谢谢~

Josin22/JSShopCartModule

Josin22

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