iOS系统归因分两种，iOS14.3以前使用iad.framework 以后使用 AdSupport和AdServices
这些framework

注意在target -> build phases -> Link binary with libraries的status中 选择optional

直接上代码 iOS14.3以下

@objc private func requestIADsDetail() {
        if #available(iOS 14.3, *) { return }
        if self.retryAdsCount <= 0 { return }
        self.retryAdsCount -= 1
        //原接入 IAD的广告投放用户接入内容为else内的内容 IOS4.0+ 如果用户接入了新的14.3+的判断会进入最下面的获取归因信息
        var attribution_enable = true
        if #available(iOS 14.0, *) {
            let status = ATTrackingManager.trackingAuthorizationStatus
            attribution_enable = status == .notDetermined || status == .authorized
            if #available(iOS 14.5, *) {
                attribution_enable = status == .authorized
            }
        }
        if attribution_enable {
            //获取详细归因
            ADClient.shared().requestAttributionDetails({ attributionDetails, error in
                print("详细归因 \(attributionDetails)")
                if #available(iOS 12.0, *) {
                    if let error = error as? ADClientError, error != nil {
                        //5s内三次重试
                        self.perform(#selector(self.requestIADsDetail), with: nil, afterDelay: 5)
                    } else if error == nil {
                        if let att = attributionDetails?.values.first as? [String: Any] {
                            self.reportIAD(info: att)
                        }
                    }
                }
            })
        }
    }
    
/// 数据上传服务器
    private func reportIAD(info: [String: Any]) {
        API.reportIadPromptionInfo(iadOrgName: info["iad-org-name"] as? String,
                                   iadOrgId: Int64(info["iad-org-id"] as? String ?? "") ?? 0,
                                   iadCampaignId:  Int64(info["iad-campaign-id"] as? String ?? "") ?? 0,
                                   iadCampaignName: info["iad-campaign-name"] as? String,
                                   iadPurchaseDate: Int64(XDStartupManager.getDateFromTime(time: (info["iad-purchase-date"] as? String ?? "")).timeIntervalSince1970),
                                   iadConversionDate: Int64(XDStartupManager.getDateFromTime(time: (info["iad-conversion-date"] as? String ?? "")).timeIntervalSince1970),
                                   iadConversionType: info["iad-conversion-type"] as? String,
                                   iadClickDate: Int64(XDStartupManager.getDateFromTime(time: (info["iad-click-date"] as? String ?? "")).timeIntervalSince1970),
                                   iadAdGroupId:  Int64(info["iad-adgroup-id"] as? String ?? "") ?? 0,
                                   iadCountryOrRegion: info["iad-country-or-region"] as? String,
                                   iadKeyword: info["iad-keyword-id"] as? String,
                                   iadKeywordMatchType: info["iad-keyword-matchtype"] as? String,
                                   iadAdId:  Int64(info["iad-ad-id"] as? String ?? "") ?? 0,
                                   iadCreativesetId:  Int64(info["iad-creativeset-id"] as? String ?? "") ?? 0,
                                   iadCreativesetName: info["iad-creativeset-name"] as? String,
                                   iadLineitemId:  Int64(info["iad-lineitem-id"] as? String ?? "") ?? 0,
                                   iadAdGroupName: info["iad-adgroup-name"] as? String,
                                   iadLineitemName: info["iad-lineitem-name"] as? String) {
            success, msg in
            print(msg)
        }
    }
    
    /// 解析特殊数据格式  eg: 2022-02-21T11:15:22Z
    static func getDateFromTime(time:String) ->Date{
        let dateformatter = DateFormatter()
        dateformatter.locale = Locale(identifier: "en_US_POSIX")
        dateformatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
        return dateformatter.date(from: time)!
    }
    

这里的坑点是要注意数据解析，特别是转时间戳这里
第二是 如果归因数据获取失败，这里加了一个重试策略

iOS14.3以后就简单了

 if #available(iOS 14.3, *) {
            do {
                token = try AAAttribution.attributionToken()
                print("ads、iad和asa token = \(token)")
            } catch {
                print("ads catch")
            }
        }

直接把token发到server就行了，当然server其实最终也是类似解析出来归因数据包，然后做记录