Question

我需要帮助，请尝试在没有图片的情况下进行UIImage，因为用户可以选择他想要的图片！并且一旦用户完全退出应用程序，用户选择的图像保持相同是非常重要的只要他想看看他想要的照片，他就可以改变它显示在个人资料图片（UIImage）斯威夫特4

        class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

    @IBOutlet var imageView: UIImageView!
    @IBOutlet var chooseBuuton: UIButton!
    var imagePicker = UIImagePickerController()




    func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!){
        self.dismiss(animated: true, completion: { () -> Void in

        })

        imageView.image = image
    }


    override func viewDidLoad() {
        super.viewDidLoad()
        // Do any additional setup after loading the view, typically from a nib.

    }
    func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
        dismiss(animated: true, completion: nil)
    }
    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

        let image = info[UIImagePickerControllerOriginalImage] as! UIImage
        imageView.image = image
        imageView.contentMode = .scaleAspectFill



        dismiss(animated: true, completion: nil)
    }

    override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

        let controller = UIImagePickerController()
        controller.delegate = self
        controller.sourceType = .photoLibrary
        present(controller, animated: true, completion: nil)
    }
}

Answer 1

如果我没有错误您希望将图像存储为，如果用户也从应用中退出。

您可以将图像存储在文档目录

中

func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {
    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
        let path = try! FileManager.default.url(for: FileManager.SearchPathDirectory.documentDirectory, in: FileManager.SearchPathDomainMask.userDomainMask, appropriateFor: nil, create: false)
        let newPath = path.appendingPathComponent("image.jpg") //Possibly you can Use the UserName to fetch easily User-wise
        let jpgImageData = UIImageJPEGRepresentation(image, 1.0)
        do {
            try jpgImageData!.write(to: newPath)
        } catch {
            print(error)
        }
    }
}

要获取图片： -

let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
let nsUserDomainMask    = FileManager.SearchPathDomainMask.userDomainMask
let paths               = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true)
if let dirPath          = paths.first
    {
        let imageURL = URL(fileURLWithPath: dirPath).appendingPathComponent("image.png")
        let image    = UIImage(contentsOfFile: imageURL.path)
        // Do whatever you want with the image
}

希望这有助于你。

您可以使用Scenario Like。最初图像视图将为空。

用户将使用选择器视图选择图像。
它将存储在文档目录
用户从App
用户登录应用程序（此时检查是否有任何带有用户名的图像，然后从文档目录中直接获取并直接显示或其他空白）
用户可以更改个人资料图片和步骤1-4重复

已编辑：集成在您的代码中：

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate {

@IBOutlet var imageView: UIImageView!
@IBOutlet var chooseBuuton: UIButton!
var imagePicker = UIImagePickerController()


override func viewDidLoad() {

    //Check if image exist in Document Directory

    let nsDocumentDirectory = FileManager.SearchPathDirectory.documentDirectory
    let nsUserDomainMask    = FileManager.SearchPathDomainMask.userDomainMask
    let paths               = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true)
    if let dirPath          = paths.first
    {
        let imageURL = URL(fileURLWithPath: dirPath).appendingPathComponent("image.png")
        let image    = UIImage(contentsOfFile: imageURL.path)
        imageView.image = image
    }else{

        // Image not present
        // Do whatever you want to do here
    }
}


func imagePickerController(picker: UIImagePickerController!, didFinishPickingImage image: UIImage!, editingInfo: NSDictionary!){
    self.dismiss(animated: true, completion: { () -> Void in

    })

    imageView.image = image
}

func imagePickerControllerDidCancel(_ picker: UIImagePickerController) {
    dismiss(animated: true, completion: nil)
}
func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [String : Any]) {

    if let image = info[UIImagePickerControllerOriginalImage] as? UIImage {
        imageView.image = image
        imageView.contentMode = .scaleAspectFill
        let path = try! FileManager.default.url(for: FileManager.SearchPathDirectory.documentDirectory, in: FileManager.SearchPathDomainMask.userDomainMask, appropriateFor: nil, create: false)
        let newPath = path.appendingPathComponent("image.jpg") //Possibly you can Use the UserName to fetch easily User-wise
        let jpgImageData = UIImageJPEGRepresentation(image, 1.0)
        do {
            try jpgImageData!.write(to: newPath)
        } catch {
            print(error)
        }
    }
    dismiss(animated: true, completion: nil)
}

override func touchesBegan(_ touches: Set<UITouch>, with event: UIEvent?) {

    let controller = UIImagePickerController()
    controller.delegate = self
    controller.sourceType = .photoLibrary
    present(controller, animated: true, completion: nil)
}}

这可能会对你有所帮助。让我知道它是否有效

允许用户选择他想要的个人资料图片并随时更改

1 个答案: