1.普通json转model方式

解析下面的一段json
{ "id":"324566", "name":"周瑜", "nick_name":"公瑾", "girl_friend":"小乔" }

1.1 OC-Model解析

建立OC类

@interface OCPerson : NSObject

@property (strong, nonatomic) NSString *personID;
@property (strong, nonatomic) NSString *name;
@property (strong, nonatomic) NSString *nickName;
@property (strong, nonatomic) NSString *girlFriend;

@end

@implementation OCPerson


+ (NSDictionary *)mj_replacedKeyFromPropertyName{
    return @{@"personID" : @"id",
             @"nickName": @"nick_name",
             @"girlFriend": @"girl_friend"};
}

@end

使用的时候

OCPerson *person = [OCPerson mj_objectWithKeyValues:[self getPersonJson]];

打断点如下图所示

image.png

1.2 Swift-Model解析

建立Swift Model

class SwiftPerson: NSObject {
    var personID: String?
    var name: String?
    var nickName: String?
    var girlFriend: String?
    
    override init() {
        super.init()
    }
    
    override static func mj_replacedKeyFromPropertyName() -> [AnyHashable : Any]{
        return ["personID": "id",
                "nickName": "nick_name",
                "girlFriend": "girl_friend"]
    }
}

在oc里使用

    SwiftPerson *person = [SwiftPerson mj_objectWithKeyValues:[self getPersonJson]];
    
    NSLog(@"person=%@",person.girlFriend);

在Swift里使用

let path = Bundle.main.path(forResource: "person.json", ofType: nil)
        
        
        do {
            guard let data = NSData.init(contentsOfFile: path!) else{
                return
            }
            guard let dict = try JSONSerialization.jsonObject(with: data as Data, options: JSONSerialization.ReadingOptions.mutableLeaves) as? Dictionary<AnyHashable, Any> else{
                return
            }
            
            NSLog("dict=%@", dict)
            
            let person = SwiftPerson.mj_object(withKeyValues:dict)
            NSLog("person.girlFriend=%@", person?.girlFriend ?? "null")
            
        } catch  {
            
        }

2.解析嵌套json Array

需要解析如下的json

{
    "start_date":"2017-12-12",
    "end_date":"2018-02-02",
    "items":[
        {
            "id":"324566",
            "name":"周瑜",
            "nick_name":"公瑾",
            "girl_friend":"小乔"
        },
        {
            "id":"432145",
            "name":"曹操",
            "nick_name":"孟德",
            "girl_friend":"抢人家小乔"
        }
    ]
}

2.1 OC Model解析

2.1.1 建立OC People类

@interface OCPeople : NSObject
@property (strong, nonatomic) NSString *startDate;
@property (strong, nonatomic) NSString *endDate;
@property (strong, nonatomic) NSArray *list;
@end

2.1.2 配置key对应关系和array对应关系类

@implementation OCPeople
+ (NSDictionary *)mj_replacedKeyFromPropertyName{
    return @{@"startDate" : @"start_date",
             @"endDate": @"end_date",
             @"list": @"items"};
}

+ (NSDictionary *)mj_objectClassInArray{
    return @{
             @"list" : @"OCPerson"
             };
}

解析效果，打断点如下所示

image.png

2.2 Swift Model解析

2.2.1 建立Swift People类

class SwiftPeople: NSObject {
    
    var startDate: String?
    var endDate: String?
    var list: [SwiftPerson]?
    
    override init() {
        super.init()
    }
}

2.2.2 配置key关系和Array类关系

override static func mj_replacedKeyFromPropertyName() -> [AnyHashable : Any]{
        return ["startDate": "start_date",
                "endDate": "end_date",
                "list": "items"]
    }
    
    override func mj_keyValuesDidFinishConvertingToObject() {
        if self.list != nil {
            
            let items = SwiftPerson.mj_objectArray(withKeyValuesArray: self.list)
            if items != nil {
                self.list = items! as NSArray as? [SwiftPerson]
            }
        }
    }

在这里不能像OC那样重写mj_objectClassInArray方法，而是需要重写mj_keyValuesDidFinishConvertingToObject方法(具体原因可以看源码，下回分解)
在OC里调用解析效果如下：

image.png

在Swift里调用解析效果如下:

image.png

点击源码