MJExtension能做什么湃密?
MJExtension是一套字典和模型之間互相轉(zhuǎn)換的超輕量級框架
MJExtension能完成的功能
字典(JSON) --> 模型(Model)
模型(Model) --> 字典(JSON)
字典數(shù)組(JSON Array) --> 模型數(shù)組(Model Array)
模型數(shù)組(Model Array) --> 字典數(shù)組(JSON Array)
詳盡用法主要參考 main.m中的各個函數(shù) 以及 NSObject+MJKeyValue.h
MJExtension和JSONModel拾弃、Mantle等框架的區(qū)別
1. 轉(zhuǎn)換速率:
最近一次測試表明:MJExtension > JSONModel > Mantle
各位開發(fā)者也可以自行測試
2.具體用法:
JSONModel:
要求所有模型類必須繼承自JSONModel基類
Mantle:
要求所有模型類必須繼承自MTModel基類
MJExtension:
不需要你的模型類繼承任何特殊基類焙畔,毫無污染县遣,毫無侵入性
如何使用MJExtension
方法一:cocoapods導(dǎo)入:pod 'MJExtension'
方法二:手動導(dǎo)入:
將MJExtensionExample/MJExtensionExample/MJExtension文件夾中的所有源代碼拽入項目中
導(dǎo)入主頭文件:#import "MJExtension.h"
MJExtension.h
MJConst.h
MJConst.m
MJFoundation.h
MJFoundation.m
MJIvar.h
MJIvar.m
MJType.h
MJType.m
NSObject+MJCoding.h
NSObject+MJCoding.m
NSObject+MJIvar.h
NSObject+MJIvar.m
NSObject+MJKeyValue.h
NSObject+MJKeyValue.m
1.最簡單的字典轉(zhuǎn)模型
typedef enum {
SexMale,
SexFemale} Sex;
@interface User : NSObject
@property (copy, nonatomic) NSString *name;
@property (copy, nonatomic) NSString *icon;
@property (assign, nonatomic) int age;
@property (assign, nonatomic) double height;
@property (strong, nonatomic) NSNumber *money;
@property (assign, nonatomic) Sex sex;
@end
NSDictionary *dict = @{
@"name" : @"Jack",
@"icon" : @"lufy.png",
@"age" : @20,
@"height" : @"1.55",
@"money" : @100.9,
@"sex" : @(SexFemale)
};
// 將字典轉(zhuǎn)為User模型
User *user = [User objectWithKeyValues:dict];
NSLog(@"name=%@, icon=%@, age=%d, height=%@, money=%@, sex=%d", user.name, user.icon, user.age, user.height, user.money, user.sex);
// name=Jack, icon=lufy.png, age=20, height=1.550000, money=100.9, sex=1
核心代碼1:
[User objectWithKeyValues:dict]
2.模型中嵌套模型
@interface Status : NSObject
/** 微博文本內(nèi)容 */
@property (copy, nonatomic) NSString *text;
/** 微博作者 */
@property (strong, nonatomic) User *user;
/** 轉(zhuǎn)發(fā)的微博 */
@property (strong, nonatomic) Status *retweetedStatus;
@end
NSDictionary *dict = @{
@"text" : @"是啊虱咧,今天天氣確實不錯!",
@"user" : @{
@"name" : @"Jack",
@"icon" : @"lufy.png"
},
@"retweetedStatus" : @{
@"text" : @"今天天氣真不錯种樱!",
@"user" : @{
@"name" : @"Rose",
@"icon" : @"nami.png"
}
}
};
// 將字典轉(zhuǎn)為Status模型
Status *status = [Status objectWithKeyValues:dict];
NSString *text = status.text;
NSString *name = status.user.name;
NSString *icon = status.user.icon;
NSLog(@"text=%@, name=%@, icon=%@", text, name, icon);
// text=是啊蒙袍,今天天氣確實不錯!, name=Jack, icon=lufy.png
NSString *text2 = status.retweetedStatus.text;
NSString *name2 = status.retweetedStatus.user.name;
NSString *icon2 = status.retweetedStatus.user.icon;
NSLog(@"text2=%@, name2=%@, icon2=%@", text2, name2, icon2);
// text2=今天天氣真不錯嫩挤!, name2=Rose, icon2=nami.png
核心代碼2
[Status objectWithKeyValues:dict]
3.模型中有個數(shù)組屬性害幅,數(shù)組里面又要裝著其它模型
@interface Ad : NSObject
@property (copy, nonatomic) NSString *image;
@property (copy, nonatomic) NSString *url;
@end
@interface StatusResult : NSObject
/** 存放著一堆的微博數(shù)據(jù)(里面都是Status模型) */
@property (strong, nonatomic) NSMutableArray *statuses;
/** 存放著一堆的廣告數(shù)據(jù)(里面都是Ad模型) */
@property (strong, nonatomic) NSArray *ads;
@property (strong, nonatomic) NSNumber *totalNumber;
@end
@implementation StatusResult
// 實現(xiàn)這個方法的目的:告訴MJExtension框架statuses和ads數(shù)組里面裝的是什么模型
/*? ? + (NSDictionary *)objectClassInArray{
return @{
@"statuses" : [Status class],
@"ads" : [Ad class]? ? };
}
+ (Class)objectClassInArray:(NSString *)propertyName{
if ([propertyName isEqualToString:@"statuses"]) {
return [Status class];
} else if ([propertyName isEqualToString:@"ads"]) {
return [Ad class];? ? }
return nil;}
*/
// 這個方法對比上面的2個方法更加沒有侵入性和污染,因為不需要導(dǎo)入Status和Ad的頭文件
+ (NSDictionary *)objectClassInArray{
return @{
@"statuses" : @"Status",
@"ads" : @"Ad"
};
}
@end
NSDictionary *dict = @{
@"statuses" : @[
@{
@"text" : @"今天天氣真不錯岂昭!",
@"user" : @{
@"name" : @"Rose",
@"icon" : @"nami.png"
}
},
@{
@"text" : @"明天去旅游了",
@"user" : @{
@"name" : @"Jack",
@"icon" : @"lufy.png"
}
}
],
@"ads" :@[
@{
@"image" : @"ad01.png",
@"url" : @"http://www.ad01.com"
},
@{
@"image" : @"ad02.png",
@"url" : @"http://www.ad02.com"
}
],
@"totalNumber" : @"2014"
};
// 將字典轉(zhuǎn)為StatusResult模型
StatusResult *result = [StatusResult objectWithKeyValues:dict];
NSLog(@"totalNumber=%@", result.totalNumber);
// totalNumber=2014
// 打印statuses數(shù)組中的模型屬性
for (Status *status in result.statuses) {
NSString *text = status.text;
NSString *name = status.user.name;? ? NSString *icon = status.user.icon;
NSLog(@"text=%@, name=%@, icon=%@", text, name, icon);}
// text=今天天氣真不錯以现!, name=Rose, icon=nami.png
// text=明天去旅游了, name=Jack, icon=lufy.png
// 打印ads數(shù)組中的模型屬性
for (Ad *ad in result.ads) {
NSLog(@"image=%@, url=%@", ad.image, ad.url);}
// image=ad01.png, url=http://www.ad01.com
// image=ad02.png, url=http://www.ad02.com
核心代碼3:
在模型內(nèi)部實現(xiàn)+ (NSDictionary *)objectClassInArray方法
[StatusResult objectWithKeyValues:dict]
4.模型中的屬性名和字典中的key不相同(或者需要多級映射)
@interface Bag : NSObject
@property (copy, nonatomic) NSString *name;
@property (assign, nonatomic) double price;@end@interface Student : NSObject
@property (copy, nonatomic) NSString *ID;
@property (copy, nonatomic) NSString *desc;
@property (copy, nonatomic) NSString *nowName;
@property (copy, nonatomic) NSString *oldName;
@property (copy, nonatomic) NSString *nameChangedTime;
@property (strong, nonatomic) Bag *bag;
@end
@implementation Student
// 實現(xiàn)這個方法的目的:告訴MJExtension框架模型中的屬性名對應(yīng)著字典的哪個key
+ (NSDictionary *)replacedKeyFromPropertyName{
return @{
@"ID" : @"id",
@"desc" : @"desciption",
@"oldName" : @"name.oldName",
@"nowName" : @"name.newName",
@"nameChangedTime" : @"name.info.nameChangedTime",
@"bag" : @"other.bag"
};
}
@end
NSDictionary *dict = @{
@"id" : @"20",
@"desciption" : @"孩子",
@"name" : @{
@"newName" : @"lufy",
@"oldName" : @"kitty",
@"info" : @{
@"nameChangedTime" : @"2013-08"
}
},
@"other" : @{
@"bag" : @{
@"name" : @"小書包",
@"price" : @100.7
}
}
};
// 將字典轉(zhuǎn)為Student模型
Student *stu = [Student objectWithKeyValues:dict];
// 打印Student模型的屬性
NSLog(@"ID=%@, desc=%@, oldName=%@, nowName=%@, nameChangedTime=%@", stu.ID, stu.desc, stu.oldName, stu.nowName, stu.nameChangedTime);
// ID=20, desc=孩子, oldName=kitty, nowName=lufy, nameChangedTime=2013-08
NSLog(@"bagName=%@, bagPrice=%f", stu.bag.name, stu.bag.price);
// bagName=小書包, bagPrice=100.700000
核心代碼4:
在模型內(nèi)部實現(xiàn)+ (NSDictionary *)replacedKeyFromPropertyName方法
[Student objectWithKeyValues:dict]
5.將一個字典數(shù)組轉(zhuǎn)成模型數(shù)組
NSArray *dictArray = @[
@{
@"name" : @"Jack",
@"icon" : @"lufy.png",
},
@{
@"name" : @"Rose",
@"icon" : @"nami.png",
}
];
// 將字典數(shù)組轉(zhuǎn)為User模型數(shù)組
NSArray *userArray = [User objectArrayWithKeyValuesArray:dictArray];
// 打印userArray數(shù)組中的User模型屬性
for (User *user in userArray) {
NSLog(@"name=%@, icon=%@", user.name, user.icon);}
// name=Jack, icon=lufy.png
// name=Rose, icon=nami.png
核心代碼5:
[User objectArrayWithKeyValuesArray:dictArray]
6.將一個模型轉(zhuǎn)成字典
// 新建模型
User *user = [[User alloc] init];
user.name = @"Jack";
user.icon = @"lufy.png";
Status *status = [[Status alloc] init];
status.user = user;
status.text = @"今天的心情不錯!";
// 將模型轉(zhuǎn)為字典
NSDictionary *statusDict = status.keyValues;
NSLog(@"%@", statusDict);
/*{ text = "今天的心情不錯!";
user = {
icon = "lufy.png";
name = Jack;
};
}*/
// 多級映射的模型
Student *stu = [[Student alloc] init];
stu.ID = @"123";
stu.oldName = @"rose";
stu.nowName = @"jack";
stu.desc = @"handsome";
stu.nameChangedTime = @"2018-09-08";
Bag *bag = [[Bag alloc] init];
bag.name = @"小書包";
bag.price = 205;
stu.bag = bag;
NSDictionary *stuDict = stu.keyValues;NSLog(@"%@", stuDict);
/*
{? ? desciption = handsome;
id = 123;
name = {
info ={
nameChangedTime = "2018-09-08";
};
newName = jack;
oldName = rose;
};
other = {
bag ={
name = "小書包";
price = 205;
};
};
}
*/
核心代碼6:
status.keyValues邑遏、stu.keyValues
7.將一個模型數(shù)組轉(zhuǎn)成字典數(shù)組
// 新建模型數(shù)組
User *user1 = [[User alloc] init];
user1.name = @"Jack";
user1.icon = @"lufy.png";
User *user2 = [[User alloc] init];
user2.name = @"Rose";
user2.icon = @"nami.png";
NSArray *userArray = @[user1, user2];
// 將模型數(shù)組轉(zhuǎn)為字典數(shù)組
NSArray *dictArray = [User keyValuesArrayWithObjectArray:userArray];
NSLog(@"%@", dictArray);
/*(
{? ? ? ? icon = "lufy.png";? ? ? ? name = Jack;? ? },
{? ? ? ? icon = "nami.png";? ? ? ? name = Rose;? ? }? )*/
核心代碼7:
[User keyValuesArrayWithObjectArray:userArray]
更多用法
參考NSObject+MJKeyValue.h
參考NSObject+MJCoding.h
作者:PPAbner
鏈接:http://www.reibang.com/p/93c242452b9b
來源:簡書
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