Firebase storage. Download array of images-CodePudding

I'm trying to download some images from Firebase Storage folder and pus it into my model Rules Firebase Folder Images in folder

My model is here. Instead of String (1,2,3,4,5) I have to use images from folder that has the same String names

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: []),
    ]
}

I have found how to write a request

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
            }
        }
    }

But it has some errors, like

Cannot assign to property: i is a let constant ... and .... Cannot assign value of type UIImage? to type String

How do I change my model or request?

I use my model in CollectionViewCell. So I have collectionView and Cell inside if it. Cell has Image and Name. This image I have to get from Firebase Storage and name I already have in my model. The reason is using Storage that my images can changes sometimes

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:

I change my model to:

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: []),
    ]
}

Then I put method to ViewWillAppear and trying to get error or result in it

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)
        }
    }

And Nothing happens, logs are empty

2022-05-29 20:20:09.668785 0700 diplom[14378:13214993] [boringssl] boringssl_metrics_log_metric_block_invoke(153) Failed to log metrics

Also I have method that helps me to save Model to another Model. Thats why I wanted to use String in my Model

Here it is.. CollectionView prepare for Detail VC

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 property

 var pictureNamed = String()

Model of Saved Collection Cell

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


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

UserDefaults where I use codable model before

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) }
    }
}

And here is my method. So there are a lot of changes... Is any resolution to get string of image?

@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()
    }

CodePudding user response：

You want to access the array of images directly, not the reference to each item.

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

Also, your images property accepts a String, as defined here:

var images: String

But you're trying to assign it a UIImage. I'm not sure what you're trying to add to the ImageModel, maybe you can elaborate?

Response to updated question:

First, allow your struct to accept images as a UIImage:

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

Then, change this line:

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

To:

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

And one final suggestion, it seems you're storing only 1 image inside ImageModel.images, so maybe change the variable name to singular image like so:

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

Let me know this makes sense