导致主线程问题的kingfisher

Question

所以这个应用程序在测试模式下工作，但是当我去构建发布的时候，我得到了这个主线程的问题。

UIImageView.image must be used from main thread only

根据错误我没有在主线程上调用一些东西，但是它抛出线程错误的那一行是空白的(见截图)

所以我只能猜测他们所说的代码是不是直接在那一行下面？

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代码

@objc func nowplaying(){
          let jsonURLString = "https://api.drn1.com.au/station/playing"
                  guard let feedurl = URL(string: jsonURLString) else { return }

                  URLSession.shared.dataTask(with: feedurl) { (data,response,err)
                      in

                      guard let data = data else { return }

                      do{
                          let nowplaying = try JSONDecoder().decode(Nowplayng.self, from: data)

                          nowplaying.data.forEach {

                              DispatchQueue.main.async {


                              self.artist.text = nowplaying.data.first?.track.artist
                              self.song.text = nowplaying.data.first?.track.title

                              }


                              print($0.track.title)

                              if var strUrl = nowplaying.data.first?.track.imageurl {

                                  strUrl = strUrl.addingPercentEncoding(withAllowedCharacters: .urlQueryAllowed)!
                                  self.imageurl.kf.setImage(with: URL(string: strUrl), placeholder: nil)

                                //MusicPlayer.shared.nowplaying(artist:  $0.track.artist, song: $0.track.title, cover:strUrl)
                                MusicPlayer.shared.getArtBoard(artist: $0.track.artist, song: $0.track.title, cover:strUrl)
                              }


                         }

我只能猜测这是因为翠鸟想要一个加载图片或其他东西。但是不清楚？

Answer 1

在UI线程上调用翠鸟的UI扩展方法的It is your responsibility。

之前：

self.imageurl.kf.setImage(with: URL(string: strUrl), placeholder: nil)

之后：

DispatchQueue.main.async {
    self.imageurl.kf.setImage(with: URL(string: strUrl), placeholder: nil)
}

Answer 2

我相信你总是可以在你自己的处理器的主线程中运行你的代码，通过使用: king fisher在下载线程上处理图像，所以这可能会导致这个问题

public func process(item: ImageProcessItem, options: KingfisherOptionsInfo) -> Image?
    return DispatchQueue.main.sync {
        let image = ... // Your code needs to be performed in UI thread
        return image
    }
}