JSONModel

如果有一个数组，且数组里包含的是自定义的对象类型，则一定要在该类前实现名为所包含对象类型的协议，且NSArray<XXImage> 括号内没有 ‘ ＊ ’

@protocol XXImage
@end

@protocol XXPicture
@end

@interface XXModel : JSONModel

@property (nonatomic, copy)  NSString *id;
@property (nonatomic, copy)  NSString *name;
@property (nonatomic, copy)  NSString *address;

@property (nonatomic, strong) NSArray<XXImage> *images;
@property (nonatomic, strong) NSArray<XXPicture> *pictures;

@end

给所有property加<optional>，在该类的.m里添加如下代码：

+ (BOOL)propertyIsOptional:(NSString *)propertyName{
    return  YES;
}

别的没什么好说的了