火源储存。下载图像数组

Question

我正在尝试从Firebase存储文件夹下载一些图像，并将其存储到我的模型规则Firebase 文件夹 文件夹中的图像中

我的模特来了。而不是字符串(1,2,3,4,5)，我必须使用来自具有相同字符串名称的文件夹中的图像

struct ImageModel {
    var images: String
    var index: Int
    var imageLabel: String
    var description: String
    var comment = [String]()
}

class Model {
   static var imageModel = [
        ImageModel(images: "1", index: 0, imageLabel: "MDA", description: "description", comment: []),
        ImageModel(images: "2", index: 1, imageLabel: "Picture!", description: "some description.", comment: []),
        ImageModel(images: "3", index: 2, imageLabel: "What is this??", description: "description", comment: []),
        ImageModel(images: "4", index: 3, imageLabel: "A long named picture", description: "description", comment: []),
    ]
}

我找到了写请求的方法

func uploadMedia() {
        let storageRef = Storage.storage().reference().child("pictures")
        let megaByte = Int64(1 * 1024 * 1024)
        
        storageRef.getData(maxSize: megaByte) { (data, error) in
            guard let data = data else { return }
            let image = UIImage(data: data)
            for i in Model.imageModel {
                i.images = image
            }
        }
    }

但是它有一些错误，比如

不能转让财产:我是一个让常量.还有..。不能赋值类型UIImage？键入字符串

如何更改我的模型或请求？

我在CollectionViewCell中使用我的模型。所以我把collectionView和细胞放在里面。单元格具有图像和名称。这个图片，我必须从Firebase Storage和名字，我已经有在我的模型。原因是我的映像有时会改变的存储方式

func collectionView(_ collectionView: UICollectionView, cellForItemAt indexPath: IndexPath) -> UICollectionViewCell {
        guard let cell = self.collectionView.dequeueReusableCell(withReuseIdentifier: CollectionViewCell.identifier, for: indexPath) as? CollectionViewCell else { return UICollectionViewCell() }
        cell.configureCollectionViewCell(picture: UIImage(named: String(Model.imageModel[indexPath.row].images))!, imageLabel: Model.imageModel[indexPath.row].imageLabel)
        return cell
    }

UPD:

我把我的模型改为：

struct ImageModel {
    var images: UIImage
    var index: Int
    var imageLabel: String
    var description: String
    var comment = [String]()
}

class Model {
   static var imageModel = [
    ImageModel(images: UIImage(), index: 0, imageLabel: "MDA", description: "description", comment: []),
    ImageModel(images: UIImage(), index: 1, imageLabel: "Picture!", description: "some description.", comment: []),
    ImageModel(images: UIImage(), index: 2, imageLabel: "What is this??", description: "description", comment: []),
    ImageModel(images: UIImage(), index: 3, imageLabel: "A long named picture", description: "description", comment: []),
    ]
}

然后，我将方法放到ViewWillAppear中，并试图得到错误或导致错误。

override func viewWillAppear(_ animated: Bool) {
        super.viewWillAppear(animated)
        self.uploadMedia()
    }
    
    func uploadMedia() {
        let storageRef = Storage.storage().reference().child("pictures")
        let megaByte = Int64(1 * 1024 * 1024)
        
        storageRef.getData(maxSize: megaByte) { (data, error) in
            guard let data = data else { return }
            let image = UIImage(data: data)
            for (index, i) in Model.imageModel.enumerated() {
                Model.imageModel[index].images = image!
            }
            guard let error = error else  { return }
            print(error.localizedDescription)
        }
    }

什么都没发生，日志是空的

2022-05-29 boringssl_metrics_log_metric_block_invoke(153)文凭14378:13214993 20:20:09.668785+0700未能记录指标

此外，我还有一些方法可以帮助我将模型保存到另一个模型。这就是为什么我想在我的模型中使用字符串

在这里..。CollectionView为Detail VC做准备

func collectionView(_ collectionView: UICollectionView, didSelectItemAt indexPath: IndexPath) {
        let vc = DetailVC()
        vc.picture = UIImageView(image: Model.imageModel[indexPath.row].images)
        vc.imageLbel.text = Model.imageModel[indexPath.row].imageLabel
        vc.pictureNamed = Model.imageModel[indexPath.row].images
        vc.index = Model.imageModel[indexPath.row].index
        vc.descripLabel.text = Model.imageModel[indexPath.row].description
        self.navigationController?.pushViewController(vc, animated: true)
    }

Detail VC性质

 var pictureNamed = String()

保存的收集单元模型

struct savedCategory: Codable {
    var images: String
    var index: Int
    var imageLabel: String
    var description: String
    var comment = [String]()
}


class SavedCategoryModel {
    static var categoryModel: [savedCategory] = []
}

以前使用可编码模型的UserDefaults

class UserDefaultsConfig {
    func saveData() {
        let defaults = UserDefaults.standard
        defaults.set(try? PropertyListEncoder().encode(SavedCategoryModel.categoryModel), forKey:"SavedStringArray")
    }
    func showList() {
        let defaults = UserDefaults.standard
        if let data = defaults.value(forKey:"SavedStringArray") as? Data { SavedCategoryModel.categoryModel = try! PropertyListDecoder().decode(Array<savedCategory>.self, from: data) }
    }
}

这是我的方法。所以有很多变化..。是否有任何分辨率来获得字符串的图像？

@objc func savePicture() {
        let newArray = savedCategory(images: self.pictureNamed, index: index, imageLabel: self.imageLbel.text!, description: self.descripLabel.text ?? "empty", comment: Model.imageModel[index].comment)
        SavedCategoryModel.categoryModel.append(newArray)
        self.userDefaults.saveData()
        self.userDefaults.showList()
    }

Answer 1

您希望直接访问图像数组，而不是对每个项的引用。

for (index, i) in Model.imageModel.enumerated() {
    Model.imageModel[index].images = image
}

另外，您的images属性接受一个字符串，如下所定义：

var images: String

但是你想给它分配一个UIImage。我不知道你想给ImageModel添加什么，也许你能详细说明一下吗？

对最新问题的答复：

首先，允许您的结构接受images作为UIImage

struct ImageModel {
    var images: UIImage // <-- from String to UIImage
    var index: Int
    var imageLabel: String
    var description: String
    var comment = [String]()
}

然后，更改这一行：

cell.configureCollectionViewCell(picture: UIImage(named: String(Model.imageModel[indexPath.row].images))!, imageLabel: Model.imageModel[indexPath.row].imageLabel)

至：

cell.configureCollectionViewCell(picture: Model.imageModel[indexPath.row].images, imageLabel: Model.imageModel[indexPath.row].imageLabel)

最后一个建议是，您似乎只在ImageModel.images中存储了一个图像，因此可能会将变量名更改为单数image，如下所示：

struct ImageModel {
    var image: UIImage // <-- from String to UIImage
    var index: Int
    var imageLabel: String
    var description: String
    var comment = [String]()
}

告诉我这是有道理的