我正在文档目录中保存firebase图像!!为了唯一性,我的文档目录名是firebase映像名!我检查了一个条件,如果在我的文档目录中不存在FialBasic图像名称,那么将该图像保存在文档目录中!!
我正在检查这个firebase名称是否意味着它保存在文档目录中,然后它获取文档目录映像如果不是,那么它从firebase获取映像!!
问题是当我试图获取图像时:-
(1)例如:-Firebase Image name为1.jpg。
(2)文档目录保存firebase名称为1.jpg的图像。
(3)现在我将firebase图像更改为其他,但它保存为名称1.jpg。
(4)当我试图获取图像,因为1.jpg已经在文档目录中,这就是为什么它不返回我更新的图像,它显示我以前的1.jpg图像!!
我怎样才能解决这个问题。谢谢您
保存并获取图像代码:-

 func saveImageDocumentDirectory(imageName: String){
        let documentPath = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
        let imgURL = documentPath.appendingPathComponent(imageName, isDirectory: true)
        if !FileManager.default.fileExists(atPath: imgURL.path){
            do{
            let image = UIImage(named: imgURL.path)
            try image?.pngData()?.write(to: imgURL)
            }catch let err{
                print("error in save:\(err.localizedDescription)")
            }
        }
    }

    func getDocumentImage(imageName: String, firebaseImgURL: URL, imgView:UIImageView){
        let documentPath = try! FileManager.default.url(for: .documentDirectory, in: .userDomainMask, appropriateFor: nil, create: true)
        let imgURL = documentPath.appendingPathComponent(imageName, isDirectory: true)
        let image = UIImage(contentsOfFile: imgURL.path)
        if image != nil{
            imgView.image = image
        }else{
            imgView.kf.setImage(with: firebaseImgURL)
        }
    }

最佳答案

请尝试下面的代码

 Save Data

 let placeholderURL: URL =
 getDocumentDirectoryPath()!.appendingPathComponent("\(imageName.JPG)/",
 isDirectory: true)
 let fileExists: Bool = FileManager.default.fileExists(atPath: placeholderURL.path )


         if !fileExists {

             let thumbnailImageURL = URL(string: firebaseURL)
             var placeholderData: Data? = nil
             if let url = url {
                 do {

                    placeholderData = try Data(contentsOf: (thumbnailImageURL ?? nil)!)
                 } catch {
                     print("Unable to load data: \(error)")
                 }
             }
             if urlData != nil {
                 do {
                     //saving is done on main thread
                     try placeholderData?.write(to: URL(fileURLWithPath: placeholderURL.path) , options: .atomic)
                 } catch {
                     print(error)
                 }

            }
       }

检索图像
    let thumbnailURL: URL = getDocumentDirectoryPath()!.appendingPathComponent("\("imageName.JPG")/", isDirectory: true)

    let fileExists: Bool = FileManager.default.fileExists(atPath: thumbnailURL.path)


    var urlThumbnail:URL? = nil
    if fileExists {

        urlThumbnail = URL(fileURLWithPath: thumbnailURL.path)
    } else {

        urlThumbnail = URL(string: firebaseURL)
    }

图像视图中的Sat图像
self.imgtemp.sd_setImage(with: urlThumbnail, placeholderImage: UIImage(named: "placeholder.png"))

关于ios - 无法在Swift 4 iOS中将正确的Firebase图片保存在文档目录中,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/55148616/

10-09 00:10