JSONModel解析Dictionary To Model /JSON To Model

你在把字典转成object的时候还在按下面这样:

self.id = [jsonDict objectForKey:@"id"];

self.name = [jsonDict objectForKey:@"name"];

self.profileImageBig = [jsonDict objectForKey:@"profile_image_big"];

self.profileImageSmall = [jsonDict objectForKey:@"profile_image_small"];

self.profileImageSquare = [jsonDict objectForKey:@"profile_image_square"];

self.firstName = [jsonDict objectForKey:@"firstName"];

self.familyName = [jsonDict objectForKey:@"familyName"];

self.age = [jsonDict objectForKey:@"age"];

这样做你就out了，太繁琐，得判断值的nil，null，类型等。使用JSONModel这样即可搞定

@interface MyModel: JSONModel

@property (strong, nonatomic) NSString* id;

@property (strong, nonatomic) NSString* name;

(etc...)

@end

添加JSONModel

pod管理的直接pod 'JSONModel'

其它的直接去下载包:https://github.com/icanzilb/JSONModel

教程参考:

http://www.touch-code-magazine.com/JSONModel/

http://www.raywenderlich.com/12139/introduction-to-cocoapods

简单介绍几个方面

指定一个索引,例如:
```
@property (strong, nonatomic) NSString<index>* name
```
你看到有一个Index,作用就是可以直接在数组中查找符合条件的对象,例如查找数组中object的name是sharofat的对象可以像下面这样写:
```
//查找index为sharofat的

NSArray *loans = feed.loans;

NSLog(@"modelWithIndexValue --->%@",[loans modelWithIndexValue:@"Sharofat"]);
```

object的数组和dict的数组相互转换,objce转json，dict

//将model的array转成dict的array

NSMutableArray *dictArray = [LoanModel arrayOfDictionariesFromModels:feed.loans];

NSLog(@"arrayOfDictionariesFromModels===>%@",dictArray);

//将dict的array转成model的array

NSMutableArray *modelArray = [LoanModel arrayOfModelsFromDictionaries:dictArray];

NSLog(@"arrayOfModelsFromDictionaries===>%@",modelArray);

LoanModel* loan = feed.loans[indexPath.row];

NSLog(@"loan.toDictionary--->%@",loan.toDictionary);

NSLog(@"loan.toJSONString--->%@",loan.toJSONString);

json，dict转object时判断value

-(BOOL)validate:(NSError**)err

{

    if ([self.name isEqual:@"Winfred"]) {

        self.name = @"Winfred rewrite name";

//        return NO;

    }

    NSLog(@"Loan of %@", self.name);

    NSLog(@"sector of %@", self.modelSector);

    NSLog(@"plandate of %@", self.plandate);

    return YES;

}

很重要的keyMapper，指定映射值,如果不指定就是默认的

转换带下划线的,例如:user_name 转换对应的key就是userName


+(JSONKeyMapper*)keyMapper

{

    return [JSONKeyMapper mapperFromUnderscoreCaseToCamelCase];

}

自定义key,例如: planned_expiration_date转换想对应plandate

+(JSONKeyMapper*)keyMapper

{

    return [[JSONKeyMapper alloc] initWithJSONToModelBlock:^NSString *(NSString *keyName) {

        if ([keyName isEqual:@"planned_expiration_date"]) {

            return @"plandate";

        }else if ([keyName isEqual:@"sector"]) {

            return @"modelSector";

        }

        else {

            return keyName;

        }

    } modelToJSONBlock:^NSString *(NSString *keyName) {

        if ([keyName isEqual:@"plandate"]) {

            return @"planned_expiration_date";

        }else if ([keyName isEqual:@"modelSector"]) {

            return @"sector";

        }else {

            return keyName;

        }

    }];

}

也可以像下面这样写:

+(JSONKeyMapper*)keyMapper {

return [[JSONKeyMapper alloc]initWithDictionary:@{@"sector":@"modelSector"}];

}

指定定义的key的类型

optional表示字段可选,例如

//链接字段是可选的，转换的时候允许link为空

@property (nonatomic,strong) NSString<optional> *link;

index表示索引，参照1

convertondemand转换对象数组,例如:

//表示数组是LoanModel对象

 @property (strong, nonatomic) NSArray<loanmodel , ConvertOnDemand>* loans;

巴特西

JSONModel解析Dictionary To Model /JSON To Model

添加JSONModel

简单介绍几个方面

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