MJExtension复杂的json数据解析

写在前面

每次写Json的数据解析的时候，就想到了小马哥的MJExtension。集成之后之后，基本上一句话搞定解析。但是每次都忘记，然后翻看之前的代码，至此记录一下。好记性，不如烂笔头啊！

先看一下数据格式

{
    code = 0;
    invitateCount = 2;
    invitateForce = 20;
    invitateList =     (
                {
            headurl = "";
            name = "";
            time = 1565602627222;
            userId = 1352;
        },
                {
            headurl = "";
            name = "";
            time = 1565605057339;
            userId = 1353;
        }
    );
    remainCount = 48;
    remainFore = 480;
}

MJExtension使用之后解析效果

//InvitateModel是接受的对象
InvitateModel *model = [InvitateModel mj_objectWithKeyValues:responseObj];

对，就是这么简单粗暴。

下面介绍一下使用技巧

首先需要声明 json数据的对象(Json最内层数组里面用一个对象InvitateUserMode，最外层用一个对象InvitateModel 方法：从内往外)

对象InvitateUserModel

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface InvitateUserModel : NSObject

@property (nonatomic, strong)NSString *userId;
@property (nonatomic, strong)NSString *time;
@property (nonatomic, strong)NSString *name;
@property (nonatomic, strong)NSString *headurl;

@end

NS_ASSUME_NONNULL_END

对象InvitateModel

#import <Foundation/Foundation.h>
#import "InvitateUserModel.h"
NS_ASSUME_NONNULL_BEGIN

@interface InvitateModel : NSObject

@property (nonatomic, strong)NSNumber *invitateCount;
@property (nonatomic, strong)NSNumber *invitateForce;
@property (nonatomic, strong)NSNumber *remainCount;
@property (nonatomic, strong)NSNumber *remainFore;
@property (nonatomic, strong)NSArray *invitateList;


@end

NS_ASSUME_NONNULL_END

#import "InvitateModel.h"

@implementation InvitateModel

+(NSDictionary *)mj_objectClassInArray {
    //将声明invitateList接受的数据对象InvitateUserModel
    return @{@"invitateList":@"InvitateUserModel"};
}


@end

下面直接开启请求模式

-(void)getUserInfoForceDeatil:(NSString *)userId {
    NSDictionary *prams = @{
                            @"action":@"getForceDeatil",
                            @"requestParam": @{
                                    @"userId":userId
                                    }
                            };
    WEAKSELF
    [[ZSCNetworkManager shareInstance]requestForUrlWithMethodPOST:BaseURL withParams:prams withSuccess:^(id responseObj, BOOL isSuccess, NSString *message, NSInteger statusCode) {
        if ([responseObj[@"code"] integerValue] == 0) {
            InvitateModel *model = [InvitateModel mj_objectWithKeyValues:responseObj];
        }
    } withFail:^(NSError *error) {
        
    }];
}

至此解析完成，是不是很简单。

再分享一个Json在转为model对象的过程中，直接对某些值的拦截操作技巧

场景1

键值拦截

实现代码

//监听键值
-(id)mj_newValueFromOldValue:(id)oldValue property:(MJProperty *)property {
    
    if ([property.name isEqualToString:@"time"]) {
        if (oldValue) {
          //自定义的时间转换分类
          NSString *timeStr = [NSString timestampSwitchTime:[oldValue integerValue]/1000 andFormatter:@"YYYY-MM-dd"];
            return timeStr; 
        }else {
            return @"日期有误";
        }
    }
    return oldValue;
}

场景2

经常遇到后台返回字段名id,而id在前端确是关键字。此时就需要转为自己定义的成员名

实现代码

+ (NSDictionary *)mj_replacedKeyFromPropertyName{
    return @{
             @"userId" : @"id"//前边的是你想用的key，后边的是返回的key
             };
}

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