Question

我想为json创建一个模型类。我的JSON示例如下所示

来自API的json回复：

msg =＆＃39; {＆＃34;输入＆＃34;：＆＃34; TYPE_NM＆＃34;，＆＃34;有效负载＆＃34;：{＆＃34; responseCode＆＃34;：0，＆＃34; nextCheckTime＆＃34;：30}}＆＃39 ;;

我想创建一个可编码（Swift）属性，就像在Objective-C中一样。

我创建了两个nsobject接口作为＆＃34; type＆＃34;和＆＃34;有效载荷＆＃34;。下面我给我的课堂片段。

      //msg model 
      @interface MessageModel : NSObject

      @property (nonatomic) NSString *type;
      @property (nonatomic) Payload *payload;
      @end
      //for payload
      @interface Payload : NSObject

      @property (nonatomic) NSUInteger responseCode;
      @property (nonatomic) NSUInteger nextCheckTime;

     @end

Answer 1

您可以将json字符串转换为NSDictionary对象并使用它来创建MessageModel

<强> 有效载荷

@interface Payload : NSObject

@property (nonatomic) NSUInteger responseCode;
@property (nonatomic) NSUInteger nextCheckTime;

@end

@implementation Payload

- (instancetype)initWithDictionary:(NSDictionary *)dict {
  self = [super init];

  if (self) {
    _responseCode = [dict[@"responseCode"] integerValue];
    _nextCheckTime = [dict[@"nextCheckTime"] integerValue];
  }

  return self;
}

@end

<强> MessageModel

@interface MessageModel : NSObject

@property (nonatomic) NSString *type;
@property (nonatomic) Payload *payload;
@end

@implementation MessageModel

- (instancetype)initWithDictionary:(NSDictionary *)dict {
  self = [super init];

  if (self) {
    _type = dict[@"type"];
    _payload = [[Payload alloc] initWithDictionary:dict[@"payload"]];
  }

  return self;
}

- (instancetype)initWithJson:(NSString *)json {
  self = [super init];

  if (self) {
    NSData *data = [json dataUsingEncoding:NSUTF8StringEncoding];
    NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:data options:0 error:nil];

    _type = dict[@"type"];
    _payload = [[Payload alloc] initWithDictionary:dict[@"payload"]];
  }

  return self;
}

@end

<强> 用法

NSString *input = @"{\"type\":\"TYPE_NM\",\"payload\":{\"responseCode\":0,\"nextCheckTime\":30}}";
MessageModel *model = [[MessageModel alloc] initWithJsonString:input];

创建要在没有任何库的情况下解析的Model类

1 个答案: