1、将NSData转换成Dictionary

/** 将二进制数据转换成字典*/

+ (NSDictionary *)dictionaryForJsonData:(NSData *)jsonData

{

    if (![jsonData isKindOfClass:[NSData class]] || jsonData.length < 1) {

        return nil;

    }

    id jsonObj = [NSJSONSerialization JSONObjectWithData:jsonData options:NSJSONReadingAllowFragments error:nil];

    if (![jsonObj isKindOfClass:[NSDictionary class]]) {

        return nil;

    }

    return [NSDictionary dictionaryWithDictionary:(NSDictionary *)jsonObj];

}

 

2、将Dictionary转为NSData

/** 将字典转换成json格式字符串,不含\n这些符号*/

+ (NSData *)compactFormatDataForDictionary:(NSDictionary *)dicJson

{

    if (![dicJson isKindOfClass:[NSDictionary class]]) {

        return nil;

    }

    NSData *jsonData = [NSJSONSerialization dataWithJSONObject:dicJson options:0 error:nil];

    if (![jsonData isKindOfClass:[NSData class]]) {

        return nil;

    }

    return jsonData;

}