在文档目录中保存图像时出错

Question

我从我的服务器获取一个图像URL，我想将其保存在文档目录中。但是在我的下面的代码中，我收到了一个错误。

这是我的文件URL路径 - file:///var/mobile/Containers/Data/Application/7AA1BEDE-DA10-4BD6-8115-06C9DCA53BF2/Documents/https://www.cocubes.com/images/getimage.aspx%3Ft=l&id=602

文件URL.path = /var/mobile/Containers/Data/Application/7AA1BEDE-DA10-4BD6-8115-06C9DCA53BF2/Documents/https://www.cocubes.com/images/getimage.aspx?t=l&id=602

'？'正在转换为％3F，因为我猜（不确定）我无法前往所需的路径。如何解决这个问题呢？？

static func saveImageInDocsDir(image: UIImage,urlString: NSString) {
    let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    // choose a name for your image
    //let fileName = "image.jpg"
    // create the destination file url to save your image
    let fileURL = documentsDirectory.appendingPathComponent(urlString as String)
    print(fileURL)
    print(fileURL.path)
    // get your UIImage jpeg data representation and check if the destination file url already exists
    if let data = image.jpegData(compressionQuality: 1.0),
        !FileManager.default.fileExists(atPath: fileURL.path) {
        do {
            // writes the image data to disk
            try data.write(to: fileURL)
            print("file saved")
        } catch {
            print("error saving file:", error)
        }
    }
}

Answer 1

请在下面添加以下行：let filePath = documentsDirectory.appendingPathComponent（fileURL）

 static func saveImageInDocsDir(image: UIImage,urlString: NSString) {
                let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
                // choose a name for your image
                //let fileName = "image.jpg"
                // create the destination file url to save your image
                let fileURL = documentsDirectory.appendingPathComponent(urlString as String)
                print(fileURL)
                print(fileURL.path)
                // get your UIImage jpeg data representation and check if the destination file url already exists
                let filePath = documentsDirectory.appendingPathComponent(fileURL)
                if let data = image.jpegData(compressionQuality: 1.0),
                    !FileManager.default.fileExists(atPath: filePath.path) {
                    do {
                    // writes the image data to disk
                    try data.write(to: fileURL)
                    print("file saved")
                    } catch {
                    print("error saving file:", error)
                }
        }
    }

Answer 2

问题是urlString包含/，FileManager试图将图像数据保存在不存在的文件夹中。您可以通过用/替换_字符的出现来解决这个问题。

let fileURL = documentsDirectory.appendingPathComponent((urlString as String).replacingOccurrences(of: "/", with: "_"))

另一种解决方案是首先创建一个文件夹。

static func saveImageInDocsDir(image: UIImage, urlString: NSString) {
    let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!
    // choose a name for your image
    //let fileName = "image.jpg"
    // create the destination file url to save your image
    let fileURL = documentsDirectory.appendingPathComponent(urlString as String)
    print(fileURL)
    print(fileURL.path)
    // get your UIImage jpeg data representation and check if the destination file url already exists
    if let data = image.jpegData(compressionQuality: 1.0),
        !FileManager.default.fileExists(atPath: fileURL.path) {
        do {
            // First create a directory
            try FileManager.default.createDirectory(at: fileURL.deletingLastPathComponent(), withIntermediateDirectories: true, attributes: nil)
            // writes the image data to disk
            try data.write(to: fileURL)
            print("file saved")
        } catch {
            print("error saving file:", error)
        }
    }
}