使用swift 4获取数据

Question

我试图从斯威夫特4中获取数据，而作为回应，我得到的是零。

1-我有这段代码，错误是“类型'JobSeekerDataAPI‘不符合协议’可解码‘

import UIKit
import SwiftyJSON

struct JobSeekerDataAPI : Decodable {

let job_seeker_id: String?
let job_seeker_name: String?
let linkedin_id: String?
let first_name: String?
let last_name: String?
let user_id: String?
let profile_pic_file: String?
let personal_job_title: String?
let about: String?
let interest: String?
let most_recent_work_history_id: String?
let most_recent_education_id: String?
let rel_work_exp_year: String?
let most_recent_salary: String?
let salary_expectation_high: String?
let salary_expectation_low: String?
let is_salary_on_public_profile: String?
let education_level_id: String?
let location_country_id: String?
let location_timezone_id: String?
let work_eligibility_id: String?
let public_seeking_status_id: String?
let search_seeking_status_id: String?
let days_before_begin_new_job: String?
let disc_self_d: String?
let disc_self_i: String?
let disc_self_s: String?
let disc_self_c: String?
let location_postal_code: String?
let will_relocate: String?
let is_default: String?
let is_military: String?
let website_url: String?
let contact_email: String?
let contact_mobile: String?
let contact_alt_phone: String?
let sort_order: String?
let disc_adj_nd_id: String?
let disc_adj_ni_id: String?
let disc_adj_ns_id: String?
let disc_adj_nc_id: String?
let disc_adj_lw_id: String?
let talent_filter_01: String?
let talent_filter_02: String?
let talent_filter_03: String?
let talent_filter_04: String?
let talent_filter_05: String?
let talent_filter_10: String?
let talent_filter_11: String?
let talent_filter_12: String?
let talent_filter_13: String?
let talent_filter_14: String?
let talent_filter_15: String?
let talent_filter_16: String?
let talent_filter_17: String?
let talent_filter_18: String?
let talent_filter_19: String?
let profileSlug: String?
let mostRecentWorkHistory: [String:String]?
let priorWorkHistories: [WorkHistory]?
let mostRecentEducationHistory: [EducationHistory]?
let priorEducationHistories: [EducationHistory]?
let topQualifications: [TopQualifications]?
let seekingLocations: String?
let education_level: EducationLevel?
let location_country: LocationCountry?
let location_timezone: LocationTimeZone?
let work_eligibility: WorkEligibility?
let public_seeking_status: SeekingStatus?
let search_seeking_status: SeekingStatus?
let most_recent_work_history: WorkHistory?
let most_recent_education: EducationHistory?
let disc_adj_nd: DiscAdjData?
let disc_adj_ni: DiscAdjData?
let disc_adj_ns: DiscAdjData?
let disc_adj_nc: DiscAdjData?
let disc_adj_lw: DiscAdjData?
let js_employer_excludes: [String]?
let js_media: [String]?
let js_occupations: [JSOccupation]?
let js_search_places: [JSSearchPlaces]?
let js_work_types: [JSWorkTypes]?
let userCoWorkers: [String]?

enum CodingKeys: String, CodingKey {

    case jobSeekerID = "job_seeker_id"
    case jobseekerName = "job_seeker_name"
    case linkedInId = "linkedin_id"
    case firstName = "first_name"
    case lastName = "last_name"
    case userID = "user_id"
    case profilePicture = "profile_pic_file"
    case personalJobTitle = "personal_job_title"
    case aboutUser = "about"
    case userInterest = "interest"
    case mostRecentWorkHistoryId = "most_recent_work_history_id"
    case mostRecentEducationId = "most_recent_education_id"
    case workExperienceYear = "rel_work_exp_year"
    case mostRecentSalary = "most_recent_salary"
    case salaryExpectationHigh = "salary_expectation_high"
    case salaryExpectationLow = "salary_expectation_low"
    case salaryVisiblePublicProf = "is_salary_on_public_profile"
    case educationLevelID = "education_level_id"
    case locationCountryID = "location_country_id"
    case locationTimezoneID = "location_timezone_id"
    case workEligibilityID = "work_eligibility_id"
    case publicSeekingStatusID = "public_seeking_status_id"
    case searchSeekingStatusID = "search_seeking_status_id"
    case daysBeforeBeguinJob = "days_before_begin_new_job"
    case discSelfD = "disc_self_d"
    case discSelfI = "disc_self_i"
    case discSelfS = "disc_self_s"
    case discSelfC = "disc_self_c"
    case locationPostalCode = "location_postal_code"
    case willRelocate = "will_relocate"
    case isDefault = "is_default"
    case isMilitary = "is_military"
    case websiteURL = "website_url"
    case contactEmail = "contact_email"
    case contactMobile = "contact_mobile"
    case contactAlternativePhone = "contact_alt_phone"
    case sortOrder = "sort_order"
    case discAdjNDID = "disc_adj_nd_id"
    case discAdjNIID = "disc_adj_ni_id"
    case discAdjNSID = "disc_adj_ns_id"
    case discAdjNCID = "disc_adj_nc_id"
    case discAdjLWID = "disc_adj_lw_id"
    //probably bool value
    case talentFilter01 = "talent_filter_01"
    case talentFilter02 = "talent_filter_02"
    case talentFilter03 = "talent_filter_03"
    case talentFilter04 = "talent_filter_04"
    case talentFilter05 = "talent_filter_05"
    case talentFilter10 = "talent_filter_10"
    case talentFilter11 = "talent_filter_11"
    case talentFilter12 = "talent_filter_12"
    case talentFilter13 = "talent_filter_13"
    case talentFilter14 = "talent_filter_14"
    case talentFilter15 = "talent_filter_15"
    case talentFilter16 = "talent_filter_16"
    case talentFilter17 = "talent_filter_17"
    case talentFilter18 = "talent_filter_18"
    case talentFilter19 = "talent_filter_19"
    case profileSlug = "profile_slug"
    case mostRecentWorkHistoryArray = "mostRecentWorkHistory"
    case priorWorkHistoriesArray = "priorWorkHistories"
    case mostRecentEducationHistoryArray = "mostRecentEducationHistory"
    case priorEducationHistoryArray = "priorEducationHistories"
    case topQUalificationsArray = "topQualifications"
    case seekingLocations = "seekingLocations"
    case educationLevel = "education_level"
    case locationCountry = "location_country"
    case locationTimeZone = "location_timezone"
    case workEligibility = "WorkEligibility"
    case publicSeekingStatus = "public_seeking_status"
    case searchSeekingStatus = "search_seeking_status"
    case discAdjND = "disc_adj_nd"
    case discAdjNI = "disc_adj_ni"
    case discAdjNS = "disc_adj_ns"
    case discAdjNC = "disc_adj_nc"
    case discAdjLW = "disc_adj_lw"
    case jobSeekerEmployerExcludes = "js_employer_excludes"
    case jobSeekerMedia = "js_media"
    case jobSeekerOccupationsArray = "js_occupations"
    case jobSeekerSearchPlacesArray = "js_search_places"
    case jobSeekerWorkTypes = "js_work_types"
    case userCoWorkers = "user_coworkers"

}
}

struct WorkHistory: Decodable{

let work_history_id : String?
let job_seeker_id: String?
let position: String?
let employer: String?
let work_history_name: String?
let work_type_id: String?
let responsibilities: String?
let reason_for_leaving: String?
let is_current_position: String?
let start_month: String?
let start_year: String?
let end_month: String?
let end_year: String?
let sort_order: String?

//    enum CodingKeys: String, CodingKey {
//
//        case workHistoryID = "work_history_id"
//        case jobSeekerID = "job_seeker_id"
//        case position = "position"
//        case employer = "employer"
//        case workHistoryName = "work_history_name"
//        case workTypeId = "work_type_id"
//        case responsabilities = "responsibilities"
//        case reasonForLeaving = "reason_for_leaving"
//        case isCurrentPosition = "is_current_position"
//        case startMonth = "start_month"
//        case startYear = "start_year"
//        case finishMonth = "end_month"
//        case finishYear = "end_year"
//        case sortOrder = "sort_order"
//    }
}

struct EducationHistory: Decodable {

let education_history_id: String?
let job_seeker_id: String?
let education_level: String?
let start_month: String?
let start_year: String?
let end_month: String?
let end_year: String?
let educational_institution: String?
let program_major: String?
let education_history_name: String?
let cumulative_gpa: String?
let major_gpa: String?
let currently_attending: String?
let sort_order: String?

//    enum CodingKeys: String, CodingKey {
//
//        case educationID = "education_history_id"
//        case jobSeekerID = "job_seeker_id"
//        case educationLevel = "education_level"
//        case startMonth = "start_month"
//        case startYear = "start_year"
//        case endMonth = "end_month"
//        case endYear = "end_year"
//        case educationalInstitution = "educational_institution"
//        case programMajor = "program_major"
//        case educationalHistoryName = "education_history_name"
//        case cumulativeGPA = "cumulative_gpa"
//        case majorGPA = "major_gpa"
//        case currentlyAttending = "currently_attending"
//        case sortEducationOrder = "sort_order"
//    }
}

struct TopQualifications: Decodable {

let requirement_id: String?
let requirement_name: String?
let requirement_descr: String?
let req_category_id: String?
let req_type_id: String?
let for_all_occupations: String?

//    enum CodingKeys: String, CodingKey {
//
//        case requirementID = "requirement_id"
//        case requirementName = "requirement_name"
//        case requirementDescription = "requirement_descr"
//        case requirementCategoryID = "req_category_id"
//        case requirementTypeID = "req_type_id"
//        case forAllOccupations = "for_all_occupations"
//    }
}

struct EducationLevel: Decodable {

let education_level_id: String?
let education_level_name: String?
let education_level_code: String?
let sort_order: String?

//    enum CodingKeys: String, CodingKey {
//
//        case educationLevelID = "education_level_id"
//        case edcationLevelName = "education_level_name"
//        case educationLevelCode = "education_level_code"
//        case sortOrder = "sort_order"
//    }
}

struct LocationCountry: Decodable {

let location_country_id: String?
let location_country_name: String?
let location_country_code: String?
let sort_order: String?

//    enum CodingKeys: String, CodingKey {
//
//        case locationCountryID = "location_country_id"
//        case locationCountryName = "location_country_name"
//        case locationCountruyCode = "location_country_code"
//        case sortOrder = "sort_order"
//    }
}

struct LocationTimeZone: Decodable {

let location_timezone_id: String?
let location_timezone_name: String?
let location_timezone_code: String?
let sort_order: String?

//    enum CodingKeys: String, CodingKey {
//        case locationTimeZoneID = "location_timezone_id"
//        case locationTimezoneName = "location_timezone_name"
//        case locationTimezoneCode = "location_timezone_code"
//        case sortOrder = "sort_order"
//    }
}

struct WorkEligibility: Decodable {

let work_eligibility_id: String?
let work_eligibility_name: String?
let work_eligibility_code: String?
let sort_order: String?

//    enum CodingKeys: String, CodingKey {
//        case workEligibilityID = "work_eligibility_id"
//        case workEligibilityName = "work_eligibility_name"
//        case workEligibilityCode = "work_eligibility_code"
//        case sortOrder = "sort_order"
//    }
}

struct SeekingStatus: Decodable {

let seeking_status_id: String?
let seeking_status_name: String?
let seeking_status_code: String?
let sort_order: String?

//    enum CodingKeys: String, CodingKey {
//
//        case seekingStatusID = "seeking_status_id"
//        case seekingStatusName = "seeking_status_name"
//        case seekingStatusCode = "seeking_status_code"
//        case sortOrder = "sort_order"
//    }
}

struct DiscAdjData: Decodable {

let disc_adj_id: String?
let disc_adj_name: String?
let disc_adj_code: String?

//    enum CodingKeys: String, CodingKey {
//
//        case discAdjID = "disc_adj_id"
//        case discAdjName = "disc_adj_name"
//        case discAdjCode = "disc_adj_code"
//    }
}

struct JSOccupation: Decodable {

let occupation_id: String?
let occupation_name: String?
let occupation_code: String?
let job_family_id: String?
let soc_coverage: String?
let description: String?
let education_level_id: String?

//    enum CodingKeys: String, CodingKey {
//        case occupationID = "occupation_id"
//        case occupationName = "occupation_name"
//        case occupationCode = "occupation_code"
//        case jobFamilyID = "job_family_id"
//        case socCoverage = "soc_coverage"
//        case description = "description"
//        case educationLevelID = "education_level_id"
//    }

}

struct JSSearchPlaces: Decodable {

let geo_place_id: String?
let country_code: String?
let geo_place_code: String?
let geo_place_name: String?

//    enum CodingKeys: String, CodingKey {
//
//        case geoPlaceId = "geo_place_id"
//        case countryCode = "country_code"
//        case geoPlaceCode = "geo_place_code"
//        case geoPlaceName = "geo_place_name"
//    }
}

struct JSWorkTypes: Decodable {
let work_type_id: String?
let work_type_name: String?

  //    enum CodingKeys: String, CodingKey {
  //
  //        case workTypeID = "work_type_id"
  //        case workTypeName = "work_type_name"
  //    }
  }

在那之后，我提出了要求：

class JobSeekerJsonRequests: NSObject{

class func jobSeekerRequest(completion: @escaping(_ error: Error?, _ jobSeekerData : JobSeekerDataAPI?) ->Void) {

    let jsonURLString = URLs.jobSeeker

    guard let url = URL(string: jsonURLString) else { return }

    URLSession.shared.dataTask(with: url) { (data, response, error) in

        guard let data = data else { return }

        do {
            let jobSeekerData = try
                JSONDecoder().decode(JobSeekerDataAPI.self, from: data)
            print(jobSeekerData)

        }catch let jsonError {
            print("Error serializing json: ", jsonError)
        }

    }.resume()
}

然后：

 func  userData(){

    JobSeekerJsonRequests.jobSeekerRequest { (error: Error?, jobSeekerData: JobSeekerDataAPI?) in

        if let jobSeekerData = jobSeekerData {

            self.myProfileJobTitle.text = jobSeekerData.most_recent_work_history?.position
            self.menuProfileName.text = jobSeekerData.job_seeker_name
            self.userNameLabel.text = jobSeekerData.first_name
            self.userNameJobPositionLabel.text = jobSeekerData.most_recent_work_history?.position
            self.userLocationLabel.text = jobSeekerData.location_country?.location_country_name
            self.infoAboutLabel.text = jobSeekerData.about
            self.userJobTitleLabel.text = jobSeekerData.most_recent_work_history?.position

        }
    }

我有一些问题要理解API请求，因为我一直在做这方面的工作，但没有任何答案。在过去的5个月里，我独自一人学得很快，而且我被困在了这个上面。对不起，如果这看起来像个愚蠢的问题，但这是为什么新的男人喜欢我被困，需要帮助。

谢谢你们！

Answer 1

使用CodingKeys enum的方式是不正确的。

如中所述，苹果文档

枚举用例的名称应该与类型中相应属性的名称相匹配。 如果序列化数据格式中使用的键与数据类型中的属性名称不匹配，则通过将字符串指定为CodingKeys枚举的原始值类型来提供替代键。用作每个枚举大小写的原始值的字符串是编码和解码期间使用的键名。

简言之：

1. 大小写名称与属性名称完全相同。
2. 特定情况下的rawValue是要使用的自定义密钥名。

你所做的与需要做的完全相反。

示例：

struct JobSeekerDataAPI : Decodable
{
    let job_seeker_id: String?
    let job_seeker_name: String?
    //Other properties

    enum CodingKeys: String, CodingKey
    {
        case job_seeker_id = "jobSeekerID" //case name is same as property name
        case job_seeker_name = "jobseekerName"
        //Other cases
    }
}

要获得更多澄清，请参阅：types

您需要对所有想要成为structs的Decodable做同样的事情。

这肯定会解决你的问题。

编辑:解码json响应数据后获得零

如果您得到了nil，请检查您的API返回了什么响应。我已经包含了一个代码片段，说明您的API响应应该是什么样的，因此您将获得什么：

class JobSeekerJsonRequests: NSObject
{
    class func jobSeekerRequest(completion: @escaping(_ error: Error?, _ jobSeekerData : JobSeekerDataAPI?) ->Void)
    {
        let jsonResponseString = "{\"jobSeekerID\":\"1234\",\"jobseekerName\":\"abcd\"}" //Something like this must be the format of your JSON response. Check the key names that are used here.
        guard let data = jsonResponseString.data(using: .utf8) else { 
            return 
        }

        do
        {
            let jobSeekerData = try
            JSONDecoder().decode(JobSeekerDataAPI.self, from: data)
            print(jobSeekerData)
        }
        catch let jsonError
        {
            print("Error serializing json: ", jsonError)
        }
    }

    func userData()
    {
        //Your code
    }
}

在执行语句之后，您将得到print(jobSeekerData)输出：

JobSeekerDataAPI(job_seeker_id: Optional("1234"), job_seeker_name: Optional("abcd"))

只需确保使用正确的键名，因为您的结果完全取决于它。

注意：首先用较少的属性测试struct中的代码，这样调试就容易了。添加更多代码会使调试问题变得困难。所以，从小开始，然后最终把它变大。

如果你还面临任何问题请告诉我。

Answer 2

您忘了在下面的CodingKeys中添加enum CodingKeys: String, CodingKey

let most_recent_work_history: WorkHistory?
let most_recent_education: EducationHistory?