为什么我要在SKAdNetworkInfo中XCode 10.2.1中的macOS Mojave 10.14.5中获得“预期返回字符串的函数中的错误返回”？

Question

我只是在编译appodeal库，我还没有写过那段代码，为什么是抛出错误呢？我能纠正一下吗？XCode截图：https://imgur.com/a/isrPe07

//
//  SKAdNetworkInfo.swift
//  CriteoPublisherSdk
//
//  Copyright © 2018-2020 Criteo. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//

import Foundation

struct SKAdNetworkInfo {
  let adNetworkIds: [String]
  let hasCriteoId: Bool

  init(bundle: Bundle = Bundle.main) {
    adNetworkIds = SKAdNetworkInfo.getAdNetworkIds(from: bundle)
    hasCriteoId = adNetworkIds.contains(CRSKAdNetworkInfo.CriteoId)
  }
}

extension SKAdNetworkInfo {
  struct Keys {
    static let items = "SKAdNetworkItems"
    static let identifier = "SKAdNetworkIdentifier"
  }

  static func getAdNetworkIds(from bundle: Bundle) -> [String] {
    (bundle.object(forInfoDictionaryKey: Keys.items) as? [[String: String]])?
      .compactMap { item in item[Keys.identifier] } ?? []
  }
}

let skanInfo = SKAdNetworkInfo()

@objc extension CRSKAdNetworkInfo {
  public static let CriteoId = "hs6bdukanm.skadnetwork"

  public class func hasCriteoId() -> Bool {
   skanInfo.hasCriteoId
  }

  public class func skAdNetworkIds() -> [String] {
    skanInfo.adNetworkIds
  }
}

错误：

函数中的“/Users/developer/Documents/SurBuild1/SurBuild2/Pods/CriteoPublisherSdk/CriteoPublisherSdk/Sources/SKAdNetwork/SKAdNetworkInfo.swift:41:3：”缺失返回函数中的“/Users/developer/Documents/SurBuild1/SurBuild2/Pods/CriteoPublisherSdk/CriteoPublisherSdk/Sources/SKAdNetwork/SKAdNetworkInfo.swift:51:3：”缺失返回函数中预期返回“Bool”Users/developer/Documents/SurBuild1/SurBuild2/Pods/CriteoPublisherSdk/CriteoPublisherSdk/Sources/SKAdNetwork/SKAdNetworkInfo.swift:55:3:的函数中缺少的返回函数中的“字符串”

来自外部库的代码如何会出现这样的编译错误？语言标准改变了还是发生了什么？我可以简单地添加一个“返回”指令使其工作吗？

Answer 1

@objc extension CRSKAdNetworkInfo {
  public static let CriteoId = "hs6bdukanm.skadnetwork"

  public class func hasCriteoId() -> Bool {
   return skanInfo.hasCriteoId
  }

  public class func skAdNetworkIds() -> [String] {
    return skanInfo.adNetworkIds
  }
}