从Firebase存储下载元数据

Question

无法访问新Firebase上的元数据.能够下载文章并让它们显示出来.

storageRef.child(article).metadataWithCompletion { (metadata, error) in
        if error != nil{
            print("error getting metadata")
        }else{

            let metadata1 = FIRStorageMetadata()
           let nameMeta = metadata1.downloadURLs

        print("nameMeta is \(nameMeta)")
        }

输出显示:nameMeta为nil

Answer 1

您不应该创建一个新的metatada实例,您应该使用闭包中已经提供的实例.

else {
  let downloadUrl = metadata.downloadUrl()
  print(downloadUrl)
}