// JSON:
{
    "uid":8082,
    "name":"Amy",
    "age":23
}

// Model:
@interface Person : NSObject
@property (nonatomic, assign) UInt64 uid;
@property (nonatomic, copy) NSString *name;
@property (nonatomic, assign) NSInteger age;
@end
@implementation Person
@end
	
// 1. Converting the JSON to an Model:
Person *p = [Person cs_modelWithJSONObject:json];

// 2. Converting the String to an Model:
 Person *np = [Person cs_modelWithJSONString:jsonStr];
	
// 3. Converting the Model to an JSON:
id json = [p cs_JSONObject];

// 4. Converting the Model to an NSString:
NSString *jsonStr =  [p cs_JSONString];

// 5. Converting the JSON Array to an Model Array:
NSArray *array = [Person cs_modelArrayWithJSONObject:jsonArray];

// 1. If a value of key in the json is an array,The json array will be
// conveted to model array by implementing this method.
+ (NSDictionary<NSString *,NSString *> *)CSModelKeyWithPropertyMapping
    return @{@"user_id":@"userId"};
}

// 2. If a value of key is a JSON object , implement this method to convert
// the JSON object to a model's properites.
+ (NSDictionary<NSString *,Class> *)CSModelArrayWithModelMapping{
    return @{@"child":[Person class]};
}

// 3. The mapping of model property and json key
+ (NSDictionary<NSString *,Class> *)CSModelDictionaryKeyWithModelMapping{
    return @{@"child":[Person class]};
}

// Model 
@interface Teacher : NSObject
@property (nonatomic, copy) NSString *name;
@property (nonatomic, assign) NSInteger age;
@property (nonatomic, copy) NSString *books;
@end
@implementation Teacher
@end

// 1. Comparing the value of two models, supported the nested Model:
BOOL isSame = [p cs_isEqualToValue:p2];

// 2. Copying the value of an model, supported the nested Model:
Person *p2 = [p cs_modelCopy];

// 3. Copying from the different model:
Teacher *teacher1 = [Teacher cs_modelCopyFromModel:p];

// Implementing the method in the `.m file` of the Model
- (NSString *)description{
    return [self cs_description];
}

// Implementing the following method in the `.m file` of the Model
- (void)encodeWithCoder:(NSCoder *)aCoder{
    [self cs_encode:aCoder];
}
- (instancetype)initWithCoder:(NSCoder *)aDecoder{
    return [self cs_decoder:aDecoder];
}