iOS中JSON与NSObject互转有两种方式:1、iOS自带类NSJSONSerialization 2、第三方开源库SBJSON、JSONKit、MJExtension。项目中一直用MJExtension来进行JSON与Model的互转,非常方便、强大,接下来介绍一下这个轻量、强大的开源库。
1、什么是MJExtension?
MJExtension是一套字典和模型之间互相转换的轻量级开源框架,github地址为:GitHub - CoderMJLee/MJExtension: A fast。功能如下:
JSON --> Model、Core Data Model
JSONString --> Model、Core Data Model
Model、Core Data Model --> JSON
JSON Array --> Model Array、Core Data Model Array
JSONString --> Model Array、Core Data Model Array
Model Array、Core Data Model Array --> JSON Array
Model Coding(归档和接档)
MJExtension特性在于JSON与Model的互转,避免了用NSJSONSerialization或者SBJSON、JSONKit等非Model解析库把JSON解析出成NSDictionary后到处用valueForKey或者objectForKey方法获取字段相应值所带来的麻烦,尤其是要在不同类之间传输数据的时候,传Model比传NSDictionary这种方式实在是方便、优雅太多了
2、MJExtension架构
1)UML类图
2)类介绍
NSObject+MJKeyValue(Model辅助类,提供字典字段到Model相应的属性转换)
NSObject+MJProperty(Model辅助类,封装Model属性操作)
MJProperty(Model属性封装类)
MJType(Model属性类型封装类)
NSObject(MJCoding)(Model归档和解档封装类)
3、MJExtension JSON转Model流程图
4、MJExtension用法举例
关于用法详情请见:GitHub - CoderMJLee/MJExtension: A fast。我这里只介绍两种常用的用法,JSON转Model,JSON转Model数组
@interface PersonModel : NSObject
@property (nonatomic, copy) NSString* name;
@property (nonatomic, copy) NSString* sex;
@property (nonatomic, copy) NSString* age;
- (void)fetchPerson
{
__weak typeof(self)weakSelf = self;
fetchPersonRequest* request = [[fetchPersonRequest alloc] init];
[request startWithCompletionBlockWithSuccess:^(YTKBaseRequest *request) {
NSDictionary* dic = [request.responseString JSONObject]; // request.responseString JSONString->NSDictionary
if (dic && ([[dic valueForKey:@"result"] integerValue] == 0))
{
weakSelf.personModel = [PersonModel objectWithKeyValues:[dic valueForKey:@"data"]]; //personModel为PersonModel对象,跟后台约定data字段为字典
//weakSelf.personModelArr = [PersonModel objectArrayWithKeyValuesArray:[dic valueForKey:@"data"]]; //personModelArr为PersonModel数组,跟后台约定data字段为字典数组
}
}
原文链接:http://www.jianshu.com/p/5854081f052f
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