swift - MJExtension 使用

MJExtension 简介：（建议使用object-c语言的model，swift的原因之后进行解释）

MJExtension 是一套字典与模型直接进行相互转化的超轻量级框架，可以使用 MJExtension 处理以下的模型字典转换

1、json -> model 、 core data model

2、jsonString -> model、core data model

3、model、 core data model -> json

4、json array -> model array、core data model array

5、jsonString -> model array、core data model array

6、model array、core data model array -> json array

7、模型之间的归档与解规定，用于数据存储

/*一个简单的model使用*/

@interface UserModel : NSObject

@property (copy, nonatomic) NSString *name;

@property (copy, nonatomic) NSString *icon;

@property (assign, nonatomic) int age;

@property (copy, nonatomic) NSString *height;

@end

func simpleUser() -> Void {

let userDic:Dictionary<String,Any> = ["name":"Jack","icon":"lufy.png",

"age":20,"height":"1.75"]

let userModel:UserModel = UserModel.mj_object(withKeyValues: userDic)

print("userModel\(userModel.name, userModel.icon, userModel.age, userModel.height)")

}

一个简单的小补充：解析常常配合缓存进行使用，当我们对自定义的model进行缓存时需要进行归档与解归档操作。使用MJExtension两步就可以完成归档与解归档

1、引入MJExtension

2、输入MJCodingImplementation

归档与解归档时的常用选择

// 在进行归档时忽略返回的属性数组

1、UserModel.mj_setupIgnoredCodingPropertyNames { () -> [Any]? in

}

// 在进行归档时仅进行归档返回的属性数组

2、UserModel.mj_setupAllowedCodingPropertyNames { () -> [Any]? in

}

字典model转换时我们经常对model进行处理(配置黑白名单)

1、mj_setupIgnoredPropertyNames:(MJIgnoredPropertyNames)ignoredPropertyNames; 设置黑名单

2、mj_totalIgnoredPropertyNames 设置黑名单

3、mj_setupAllowedCodingPropertyNames:(MJAllowedCodingPropertyNames)allowedCodingPropertyNames; 设置白名单

4、mj_totalAllowedCodingPropertyNames 设置白名单

/*当model中含有model时的解析操作*/

#import <Foundation/Foundation.h>

#import "UserModel.h"

@interface PersonModel : NSObject

@property (nonatomic,strong) UserModel *user;

@property (nonatomic,copy) NSString *address;

@property (nonatomic,copy) NSString *infoMation;

@end

func contentModel() -> Void {

let personDic:Dictionary<String,Any> = ["address":"上海市","infoMation":"你还能说什么","user":["name":"Jack","height":"1.75"]]

let personModel:PersonModel = PersonModel.mj_object(withKeyValues: personDic)

print("personMode:\(personModel.address, personModel.infoMation,personModel.user.name,personModel.user.height,personModel.user.age)")

let cache:YYCache = YYCache(name: "PersonCache")!

cache.setObject(personModel as? NSCoding, forKey: "personKey")

}

/*当model中含有数组时，数组中有的是model，有的是非model时的操作*/

#import <Foundation/Foundation.h>

#import "UserModel.h"

@interface ArrayModel : NSObject

@property (nonatomic,strong) NSMutableArray *presonModelArray;

// 当存放的不是model时接受数组

@property (nonatomic,strong) NSMutableArray *other;

@property (nonatomic,copy) NSString *descripution;

@end

func contentArray() -> Void {

/*因为arrayModel中含有数组，所以需要进行类型指定操作*/

/*数组中需要转换的模型类*/

ArrayModel.mj_setupObjectClass { () -> [AnyHashable : Any]? in

return ["presonModelArray":"PersonModel"]

}

let arrayDic:Dictionary<String,Any> = ["presonModelArray":[

["address":"上海市","infoMation":"你还能说什么","user":["name":"Jack","height":"1.75"]],

["address":"上海市","infoMation":"你还能说什么","user":["name":"Jack","height":"1.75"]],

["address":"上海市","infoMation":"你还能说什么","user":["name":"Jack","height":"1.75"]]],

"other":["name","sex","age","other"],

"descripution":"lalalala"]

let arrayModel:ArrayModel = ArrayModel.mj_object(withKeyValues: arrayDic)

print("arrayModel:\(arrayModel.presonModelArray, arrayModel.descripution, arrayModel.other)")

}

/*模型属性名与字典中的key不同时的操作*/

#import <Foundation/Foundation.h>

@interface DefirentModel : NSObject

@property (copy, nonatomic) NSString *def;

@property (copy, nonatomic) NSString *desc;

@property (copy, nonatomic) NSString *nowName;

@property (copy, nonatomic) NSString *oldName;

@property (copy, nonatomic) NSString *nameChangedTime;

@end

func defirentModel() -> Void {

let defDic:Dictionary<String,Any> = ["id":"20",

"name":["newName":"lufy",

"oldName":"kitty",

"info":["test-data",["nameChangedTime":"2013-08"]]],

"desciption":"kids",

"other":["bag":["name":"a red bag","price":"100.7"]]]

/*字典属性名称映射

* 把字典中的key映射到model中

*/

DefirentModel.mj_setupReplacedKey { () -> [AnyHashable : Any]? in

return ["def":"id",

"desc":"desciption",

"oldName":"name.oldName",

"nowName":"name.newName",

"nameChangedTime":"name.info[1].nameChangedTime",

"bag":"other.bag"]

}

let model:DefirentModel = DefirentModel.mj_object(withKeyValues: defDic)

print("model:\(model.def,model.desc,model.oldName,model.nowName,model.nameChangedTime)")

}

/*数组字典转换成模型

* 前提条件是数组中存储的是同一类的内容，

*/

/*数组字典转换成模型*/

func changeArrayForModeArray() -> Void {

let userArray:Array<Any> = [["name":"Jack","icon":"lufy.png",

"age":20,"height":"1.75"],

["name":"Jack","icon":"lufy.png",

"age":20,"height":"1.75"],

["name":"Jack","icon":"lufy.png",

"age":20,"height":"1.75"],

["name":"Jack","icon":"lufy.png",

"age":20,"height":"1.75"]]

let array:Array<UserModel> = UserModel.mj_objectArray(withKeyValuesArray: userArray) as! Array<UserModel>

print("array:\(array)")

}