Swift 从Firebase下载图像

请帮帮我。解释如何在单元格中设置图像。在我的数据库中，我有：title、description和imageURL（来自Firebase存储的url）。你能给我写个代码解释一下吗

class TrainingProgram
{
    var description = ""
    var title = ""
    var imageURL = ""


    init(description: String, title: String, imageURL: String) {
        self.description = description
        self.title = title
        self.imageURL = imageURL

    }

函数从firebase获取数据

func fetchPrograms() {
        Database.database().reference().child("programs").observe(.childAdded) { (snapshot) in
            if let dict = snapshot.value as? [String: AnyObject] {
                let newTitle = dict["title"] as! String
                let newDescription = dict["description"] as! String
                let newImageURL = dict["imageURL"] as! String
                let trainingCell = TrainingProgram(description: newDescription, title: newTitle, imageURL: newImageURL)
                self.trainingPrograms.append(trainingCell)
                DispatchQueue.main.async {
                    self.collectionView.reloadData()

                }
            }
        }

    }

这就是我设置单元格标题和描述的方式

 func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
    {

        let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "TrainingProgramCollectionViewCell", for: indexPath) as!  TrainingProgramCollectionViewCell

        //cell.featuredImageView.setImage(from: indexPath.item)
        cell.titleLabel.text = trainingPrograms[indexPath.item].title
        cell.descriptionLabel.text = trainingPrograms[indexPath.item].description

我需要在函数中编写什么来接收数据以获取图像，以及如何在单元格中设置图像

---

从此链接安装SDWebImage pod

在CollectionView

cellForRow

方法中

    var images_list = [String]()
    var imagesArray = [URL]()
    images_list.append(itemModel[indexPath.row]. imageURL)
    let storage = Storage.storage().reference()

    for x in images_list{
        print(x)

        let storageRef = storage.child("images/\(x).jpg")
        storageRef.downloadURL { (url, error) in
            if let error = error{
                print(error.localizedDescription)
            }
            else{
                imagesArray.append(url!)
            }
            if let x = images_list.last{
              cell.itemImage.sd_setImage(with: URL(string: x), placeholderImage: UIImage(named: "default"))
            }
        }
    }

完整代码

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell
   {

    let cell = collectionView.dequeueReusableCell(withReuseIdentifier: "TrainingProgramCollectionViewCell", for: indexPath) as!  TrainingProgramCollectionViewCell

    //cell.featuredImageView.setImage(from: indexPath.item)
    cell.titleLabel.text = trainingPrograms[indexPath.item].title
    cell.descriptionLabel.text = trainingPrograms[indexPath.item].description

    var images_list = [String]()
    var imagesArray = [URL]()
     for x in images_list{
        print(x)

        let storageRef = storage.child("images/\(x).jpg")
        storageRef.downloadURL { (url, error) in
            if let error = error{
                print(error.localizedDescription)
            }
            else{
                imagesArray.append(url!)
            }
            if let x = images_list.last{
              cell.itemImage.sd_setImage(with: URL(string: x), placeholderImage: UIImage(named: "default"))
            }
        }
    }

 }

下载单幅图像时请尝试此方法，只需从firebase获取您的imageUrl即可

 let x: String = "yourImageUrl" 
 let storageRef = storage.child("images/\(x).jpg")
        storageRef.downloadURL { (url, error) in
            if let error = error{
                print(error.localizedDescription)
            }
            else{
                imagesArray.append(url!)
            }
            if let x = images_list.last{
              cell.itemImage.sd_setImage(with: URL(string: x), placeholderImage: UIImage(named: "default"))
            }
        }

---

是否要在tableView单元格上显示图像？@wings是的。我不明白如何在我的电脑中显示firebase的图像cells@wings你能给我写一个代码，它将从FirebaseDatabase获取url（DB有来自存储的url）并显示在单元格上吗？@我添加的DBComments结构不用于扩展讨论；这段对话已经结束。