- JSONModel 是一个轻量级的第三方库，可以很方便的实现 Json 解析及模型转换，它缺乏个人色彩的名字也甚合朕意。
model --> JSON/Dic/Data
Model* model = [[Model alloc] initWithString:jsonString error:nil];
model.name = @"Changed Name";
//convert to dictionary
NSDictionary* dict = [model toDictionary];
//convert to text
NSString* string = [model toJSONString];
JSON/Data/Dic --> model
//AFN的网络请求大抵如此
AFHTTPSessionManager *manager = [AFHTTPSessionManager manager];
manager.requestSerializer = [AFHTTPRequestSerializer serializer];
manager.responseSerializer = [AFHTTPResponseSerializer serializer];
[manager POST:kURL
parameters:@{}
progress:nil
success:^(NSURLSessionDataTask * _Nonnull task, id _Nullable responseObject) {
//这三种方式都可以实现解析，并转model,
//但JSONModel的源码看，其实还是用系统源生的NSJSONSerialization 和 setValueWithDictionary 实现的
// 1.NSData 直接转 model
RespondModel *model = [[RespondModel alloc]initWithData:responseObject error:nil];
// 2.json字符串转 model
//NSString *str = [[NSString alloc]initWithData:responseObject encoding:NSUTF8StringEncoding];
//RespondModel *model = [[RespondModel alloc]initWithString:str
// usingEncoding:NSUTF8StringEncoding error:nil];
// 3. dic 字典转 model
//NSDictionary *dic = [NSJSONSerialization JSONObjectWithData:responseObject
// options:NSJSONReadingAllowFragments error:nil];
//RespondModel *model = [[RespondModel alloc]initWithDictionary:dic error:nil];
NSLog(@"%@",model.result);
NSLog(@"%@",model.data.total);
NSLog(@"%@",((TopicModel*)model.data.list[0]).title);
NSLog(@"%@",((TopicModel*)model.data.list[8]).isHot);
NSLog(@"%@",((TopicModel*)model.data.list[0]).addTime);
} failure:^(NSURLSessionDataTask * _Nullable task, NSError * _Nonnull error) {
NSLog(@"数据请求出错");
}];
关于Model的创建
.h文件
//有些人不建议将model 写在同一个类中，
//但除非特别复杂，写在一起会很方便数据模型修改
//必须写这个空协议
@protocol TopicModel <NSObject>
@end
//所有模型都继承自JSONModel
@interface CounterListModel : JSONModel
@property(nonatomic,retain)NSString *comment;
//可选属性，属性值可以为空，防止服务器返回数据为空导致程序崩溃
@property(nonatomic,retain)NSString <Optional>*like;
//忽略属性，属性值不需要从服务器中获取
@property(nonatomic,retain)NSString <Ignore>*view;
@end
@interface UserInfoModel : JSONModel
@property(nonatomic,retain)NSString *uid;
@property(nonatomic,retain)NSString *uname;
@property(nonatomic,retain)NSString *icon;
@end
@interface TopicModel : JSONModel
@property(nonatomic,retain)NSString *title;
@property(nonatomic,retain)NSString *contentid;
@property(nonatomic,retain)NSString *addtime_f;
@property(nonatomic,retain)NSString *addTime;
@property(nonatomic,retain)NSString *content;
@property(nonatomic,retain)NSString *coverimg;
@property(nonatomic,retain)NSString *songid;
@property(nonatomic,assign)BOOL isRecommend;
@property(nonatomic,retain)NSNumber *isHot;
@property(nonatomic,retain)UserInfoModel *userInfoModel;
@property(nonatomic,retain)CounterListModel *counterListModel;
@end
@interface DataModel : JSONModel
@property(nonatomic,copy)NSString *total;
//JSONModel处理复杂字典的原理是通过协议
//根据协议名去找到名字一样的类名去装这个模型
@property(nonatomic,retain)NSArray <TopicModel> *list;
@end
@interface RespondModel : JSONModel
@property(nonatomic,retain)NSString *result;
@property(nonatomic,retain)DataModel *data;
@end
/**
* [model toDictionary]; model 可以方便转字典
* [model toJSONString]; model 也可方便转字符串
*/
.m 有特殊需求可以写相应方法
/**
* The JSONMOdel framework is ARC only, you can enable ARC on per file basis.
* ARC only
* ARC only
* ARC only
*/
@implementation CounterListModel
+(BOOL)propertyIsOptional:(NSString *)propertyName{
//设置属性值可以为空，防止由于服务器数据返回为空导致JSONModel异常，程序崩溃
return YES;
}
@end
@implementation UserInfoModel
+(BOOL)propertyIsOptional:(NSString *)propertyName{
return YES;
}
@end
@implementation RespondModel
+(BOOL)propertyIsOptional:(NSString *)propertyName{
return YES;
}
@end
@implementation DataModel
+(BOOL)propertyIsOptional:(NSString *)propertyName{
return YES;
}
@end
@implementation TopicModel
//属性和字典键映射
+ (JSONKeyMapper*)keyMapper{
return [[JSONKeyMapper alloc]initWithDictionary:
@{
@"ishot":@"isHot",
@"addtime":@"addTime"
}];
}
+(BOOL)propertyIsOptional:(NSString *)propertyName{
return YES;
}
