ios - 我确实从相机或图库中选择了一张图片，以及如何保存该图片以在其他 View 中显示？

Question

我做了所有从相机或画廊获取图像的事情，但是如何将该图像保存在数组或领域数据中以显示在其他 viewController 中。

我该怎么做？

程序:-

 //Camera to save image and display later
 func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {

    showImage.image = info[UIImagePickerController.InfoKey.originalImage]
    imagePicker.dismiss(animated: true, completion: nil)

   }

Answer 1

如果您不想在应用程序中保留图像而只想保存图像以在其他 View Controller 中显示，那么您可以将该图像传递给其他 View Controller 。

let viewContrller = OtherViewController() //the view controller you need to pass image to
viewController.image = image //the image you need to pass to other view controller
navigationController(push: vc, animated: true)

将图像保存在文档目录中...

func saveImage(withName name: String) {
        let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!

        // create the destination file url to save your image
        let fileURL = documentsDirectory.appendingPathComponent(fileName)

        // 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)
            }
        }
    }

因此您可以在其他 View Controller 中显示保存的图像。

func getImageFromDocDir(named imgName: String) -> UIImage? {

    let documentsDirectory = FileManager.default.urls(for: .documentDirectory, in: .userDomainMask).first!

    // create the destination file url to save your image
    let fileURL = documentsDirectory.appendingPathComponent(imgName)
    if FileManager.default.fileExists(atPath: fileURL.path) {

        do {
            let imgData = try Data(contentsOf: fileURL)
            return UIImage(data: imgData)
        } catch {
            print(error.localizedDescription)
        }
    }

    return nil
}