iOS开发——工厂模式

　　工厂模式很好用，为表诚意，我直接搞个实用的例子放这，解析一个订单的数据，并且这个订单里面可能不止一件商品的做法。

　　还是直接上代码，不懂的地方，再提出来。

　　1.在MyOrderDeals.h文件中

#import <Foundation/Foundation.h>

@interface MyOrderDeals : NSObject

@property(nonatomic,strong) NSString *id;

@property(nonatomic,strong) NSString *orderID;

@property(nonatomic) float allMoney;

@property(nonatomic) float transportationCost;

@property(nonatomic,strong) NSMutableArray *goodsArr;

+(id)myOrderDealsWithDict:(NSDictionary*)dict;

@end

　　2.在MyOrderDeals.m文件中

#import "MyOrderDeals.h"

#import "SingleOrderCellDeal.h"

@implementation MyOrderDeals

+(id)myOrderDealsWithDict:(NSDictionary *)dict {

return [[self alloc] initWithDict:dict];

}

-(id)initWithDict:(NSDictionary*)dict{

self = [super init];

if (self) {

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

self.orderID = dict[@"order_sn"];

self.allMoney = [dict[@"pay_amount"] floatValue];

self.transportationCost = [dict[@"delivery_fee"] floatValue];

self.goodsArr = [NSMutableArray array];

for (NSDictionary *singleDealDict in dict[@"goods"]) {

SingleOrderCellDeal *deal = [SingleOrderCellDeal singleOrderDealCellWithDict:singleDealDict];

[self.goodsArr addObject:deal];

}

}

return self;

}

@end

　　3.在SingleOrderCellDeal.h文件中

#import <Foundation/Foundation.h>

@interface SingleOrderCellDeal : NSObject

@property(nonatomic,strong) NSString *title;

@property(nonatomic) float currentPrice;

@property(nonatomic,strong) NSString *selledCount;

@property(nonatomic,strong) NSURL *imageURL;

+(id)singleOrderDealCellWithDict:(NSDictionary*)dict;

@end

　　4.在SingleOrderCellDeal.m文件中

#import "SingleOrderCellDeal.h"

@implementation SingleOrderCellDeal

static NSString *imageURL = @"http://www.joinbuy.cn";

+(id)singleOrderDealCellWithDict:(NSDictionary *)dict {

return [[self alloc] initWithDict:dict];

}

-(id)initWithDict:(NSDictionary*)dict{

self = [super init];

if (self) {

self.title = dict[@"name"];

self.currentPrice = [dict[@"unit_price"] floatValue];

self.selledCount = dict[@"number"];

self.imageURL = [NSURL URLWithString:[imageURL stringByAppendingString:dict[@"icon"]]];

}

return self;

}

@end

　　5.在需要调用的地方

#import "MyOrderDeals.h"

#import "SingleOrderCellDeal.h"

@property(nonatomic,strong) NSMutableArray *myOrders;

-(NSMutableArray *)myOrders{

if (!_myOrders) {

_myOrders = [NSMutableArray array];

}

return _myOrders;

}

　　  //在从服务器导下一组订单数据后

　　  NSArray *array = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

for (NSDictionary *dict in array) {

MyOrderDeals *deal = [MyOrderDeals myOrderDealsWithDict:dict];

[self.myOrders addObject:deal];

}

　　这样一来，从服务器导下来的订单数据，就都解析保存在myOrders这个数组中了，需要什么数据，只要取对应的值就行了。