所謂模型套模型,一般就是我們數(shù)據(jù)返回的是字典類型數(shù)組,于此同時這個字典類型里也有一個數(shù)組,而這個數(shù)組又是字典類型的!
是不是有點繞呢,放下Data一看就明白了!

data = [
 {
    address = 北京市 北京市 豐臺區(qū) 某某街,
    totalAmt = 0,
    favouredBillId = 0,
    realAmt = 0,
    tradeNum = 1,
    status = 0,
    tradeList = 105,103,
    yunAmt = 0,
    favouredMethod = ,
    tuanUser = [
 ],
    payedMethod = ,
    shopCartList = [
 {
    id = 105,
    unit = 千克,
    shopUserName = 北京市大興區(qū),
    isYun = 0,
    shopPrice = 777,
    countMoney = 777,
    shopInfo = ,
    shopImg = /commodityImg/abcs3B.jpg,
    createDate = 1478138532000,
    tuanPrice = 0,
    count = 2,
    state = 1,
    userId = 10,
    yunPrice = 0,
    orderId = 20161103100225800744,
    shopId = 10,
    shopVipPrice = 222,
    shopName = 豬豬飼料11
 },
 {
    id = 103,
    unit = 噸,
    shopUserName = 北京市大興區(qū),
    isYun = 0,
    shopPrice = 1111,
    countMoney = 2222,
    shopInfo = ,
    shopImg = /commodityImg/abcs3B.jpg,
    createDate = 1478138504000,
    tuanPrice = 0,
    count = 2,
    state = 1,
    userId = 10,
    yunPrice = 0,
    orderId = 20161103100225800744,
    shopId = 11,
    shopVipPrice = 609,
    shopName = 豬豬飼料12
 }
 ],
    name = 張smile,
    id = 65,
    orderNo = 20161103100225800744,
    paySource = ,
    phone = 12345678900,
    isTuan = 0,
    payedTime = <null>,
    orderTime = 1478138545000,
    favouredBill = 0,
    favouredAmt = 0,
    userId = 10
 }
 ],

項目中是不是會經(jīng)常遇到這種模型套型的情況,現(xiàn)以上為栗子, 這里的 data 是訂單數(shù)組(暫叫一級 訂單model), data 下有個shopCartList訂單里的商品數(shù)組(暫叫二級 商品model).

一. 這類情況最好寫兩個 Model,便于后面各種邏輯賦值等等

1.每個訂單里的商品模型XHHOrderModel

#import <Foundation/Foundation.h>

@interface XHHOrderModel : NSObject

// 商品id
@property (nonatomic, copy) NSString *shopId;

// 商品圖片url
@property (nonatomic, copy) NSString *shopImg;

// 商品名稱
@property (nonatomic, copy) NSString *shopName;

// 普通價格
@property (nonatomic, assign) double shopPrice;

// vip價格
@property (nonatomic, assign) double shopVipPrice;

// 團購價格
@property (nonatomic, assign) double tuanPrice;

// 當前商品運費
@property (nonatomic, assign) double yunPrice;

// 當前商品總價格(運費除外)
@property (nonatomic, assign) double countMoney;

// 是否是預估運費還是實際運費 0預估 1修改地址 2實際
@property (nonatomic, copy) NSString *isYun;

// 單位
@property (nonatomic, copy) NSString *unit;

// 選擇商品噸數(shù)量值
@property (nonatomic, assign) NSInteger count;

+ (NSArray *)loadOrderInfoFromJson:(NSArray *)array;

子Model 的. m 文件就是簡單的轉換模型了;

#import "XHHOrderModel.h"
#import "MJExtension.h"

@implementation XHHOrderModel

+ (NSArray *)loadOrderInfoFromJson:(NSArray *)array {
    
    return [self objectArrayWithKeyValuesArray:array].copy;
}

- (double)countMoney {
    
    return _shopPrice * self.count;
}

2.我的訂單模型 XHHMyOrderModel

#import <Foundation/Foundation.h>

// 類型枚舉
typedef enum {
    XHHOrderStatus_all = 0, // 全部訂單
    XHHOrderStatus_complete, // 再次購買(訂單完成)
    XHHOrderStatus_applying, //申請中
    XHHOrderStatus_toBePaid, //待支付
    XHHOrderStatus_salesReturnApply, //退貨申請
    XHHOrderStatus_salesReturning,  //退貨中
    XHHOrderStatus_salesReturned,   //退貨成功
} XHHOrderStatus; // 申請中--待支付--已支付--待發(fā)貨--發(fā)貨中--確認收貨--訂單完成(再次購買)--退貨申請--退貨中--退貨成功

@interface XHHMyOrderModel : NSObject

// 訂單號
@property (nonatomic, copy) NSString *orderNo;

// 訂單狀態(tài)status
@property (nonatomic, assign) XHHOrderStatus status;

// 訂單時間
@property (nonatomic, copy) NSString *orderTime;

// 下單時間
@property (nonatomic, copy) NSString *payedTime;

// 姓名收貨人
@property (nonatomic, copy) NSString *name;

// 地址
@property (nonatomic, copy) NSString *address;

// 電話
@property (nonatomic, copy) NSString *phone;

// 商品件數(shù)
@property (nonatomic, assign) NSInteger tradeNum;

// 商品數(shù)組
@property (nonatomic, strong) NSArray *shopCartList;

// 產(chǎn)品實際支付
@property (nonatomic, assign) double realAmt;

@property (nonatomic, assign) double totalAmt;

// 總產(chǎn)品實際支付
@property (nonatomic, assign) double countMoney;

// 總運費
@property (nonatomic, assign) double yunAmt;

// 團購, 1為是
@property (nonatomic, assign) BOOL isTuan;

// 團購合伙人號碼
@property (nonatomic, strong) NSArray *tuanUser;

// 團購交易總計噸數(shù)
@property (nonatomic, assign) NSInteger tradeList;

+ (NSArray *)loadMyOrderInfoFromJson:(NSArray *)array;

至于一級訂單Model 的.m 文件就一定要注意了,套模型!!!

#import "XHHMyOrderModel.h"
#import "MJExtension.h"
#import "NSString+XHHTime.h"
#import "XHHOrderModel.h"

@implementation XHHMyOrderModel

+ (NSArray *)loadMyOrderInfoFromJson:(NSArray *)array {
    
    return [self objectArrayWithKeyValuesArray:array].copy;
}

// 將時間戳轉化為時間
- (NSString *)orderTime {
    
    return [_orderTime timeChangeWithDateFormat:@"yyyy-MM-dd hh:mm"];
}

// 將時間戳轉化為時間
- (NSString *)payedTime {
    
    return [_payedTime timeChangeWithDateFormat:@"yyyy-MM-dd hh:mm"];
}

+ (NSDictionary *)objectClassInArray {
    
    return @{@"shopCartList" : [XHHOrderModel class] };
}

二. 電商產(chǎn)品中訂單類較多會出現(xiàn)類似下面界面:

由于我們的后臺比較任性,商品總件數(shù)及實際付款不在一級訂單 model 里返回,而是在二級商品中需要我們前臺去做加法把二級商品數(shù)組 里的價格數(shù)據(jù)相加得到總價錢!

簡單方法來說, 我們可以在View 里給 Model模型 賦值時做處理:

// model賦值
- (void)setModel:(XHHMyOrderModel *)model {
    
    _model = model;
    
    // 取出子 Model 的每張圖片
    NSArray *imgArray = [model.shopCartList valueForKeyPath:@"shopImg"];
    // 數(shù)組里面 商品價格和
    NSNumber *countMoney = [model valueForKeyPath:@"shopCartList.@sum.countMoney"]; 
    // 數(shù)組里面 運費和
    NSNumber *yunPrice = [model valueForKeyPath:@"shopCartList.@sum.yunPrice"]; 
    // 實際價格
    CGFloat realAmt = [countMoney doubleValue] + [yunPrice doubleValue]; 
}

當然也可以在 Controller 里取出數(shù)據(jù),在 dateSource 里從字典里循環(huán)拿出每件商品價格相加得到總價格

三. 當訂單創(chuàng)建 OK 時,這個時候進入訂單詳情查詢訂單時,同樣是這種模型套模型的數(shù)據(jù),但因其界面性,我選擇使用多分區(qū)來展現(xiàn)訂單詳情,第三個分區(qū)來展現(xiàn) 商品View, 通過兩套MVC來展現(xiàn)整個界面!

1.先截取查詢訂單網(wǎng)絡請求部分代碼:

if ([json[@"data"] count]) {
                
                weakSelf.yunAmt = 0.00; // 總運費
                weakSelf.realAmt = 0.00; // 總價格
                
            // 訂單 model 下的訂單數(shù)據(jù)
                weakSelf.myOrderModel = [XHHMyOrderModel loadMyOrderInfoFromJson:json[@"data"]][0];
                
                if ([json[@"data"][0][@"shopCartList"] count]) {
                    
                    // 循環(huán)相加數(shù)組里字典的運費 得到總運費及總價格
                    for (NSDictionary *dic in json[@"data"][0][@"shopCartList"]) {
                        
                        weakSelf.yunAmt = weakSelf.yunAmt + [dic[@"yunPrice"] doubleValue];
                        weakSelf.realAmt = weakSelf.realAmt + [dic[@"countMoney"] doubleValue];
                        
                    }
                 // 子 Model下的商品列表數(shù)據(jù)
                  [weakSelf.goodList addObjectsFromArray:[XHHOrderModel loadOrderInfoFromJson:json[@"data"][0][@"shopCartList"]]];
                    
                } else {
                    [MBProgressHUD showError:[NSString stringWithFormat:@"%@", json[@"errorMessage"]]];
                }
         
            }
        }
        [weakSelf.tableView reloadData];

2.接著通過訂單 MVC 和商品 MVC 來相對應數(shù)據(jù)處理及展示,抽取核心代碼:

#pragma mark - Table view data source

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

    if (indexPath.section == 0) {
        
        cell.textLabel.text = [NSString stringWithFormat:@"訂單號: %@", self.orderNo];
        
    } else if (indexPath.section == 1) { // 一級訂單 Model
        XHHOrderAddressCell *cell = [XHHOrderAddressCell cellWithTableView:tableView];
        cell.model = self.myOrderModel;
        
        return cell;
    } else if (indexPath.section == 2) { // 二級商品 Model
        XHHOrderGoodCell *cell = [XHHOrderGoodCell cellWithTableView:tableView];
        
        if (self.goodList.count) {
            XHHOrderModel *model = self.goodList[indexPath.row];
            cell.model = model;
        }
        return cell;
    } 
      
    return cell;
}

#pragma mark - UITableViewDelegate

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(nonnull NSIndexPath *)indexPath {
    
    if (indexPath.section == 1) {
        return XHHOrderAddressCellHeight;
    } else if (indexPath.section == 2) {
        return XHHOrderGoodCellHeight;
    }
    return 40;
}

當商品數(shù)據(jù)多與一條時,則 商品MVC效果比較明顯啦~

PS:
類似于這種訂單類思路,在產(chǎn)生訂單號前我們需要自己去計算總價或者是否會員價之類的,但是一旦產(chǎn)生訂單后,所有關于 值類數(shù)據(jù)都必須從訂單詳情數(shù)據(jù)里去取,而不是自己去計算!

是不是現(xiàn)在覺得邏輯順了很多呢,看到這了,希望對你有幫助喲_{本寶寶要去洗漱啦,晚安,各位程序媛程序猿們}

如果想看類似索引那種類型的Model 套 Model, 請移步類似索引Model套Model之 iOS模型閑聊二