允许用户选择他想要的个人资料图片，并随时更改

Question

我需要帮助，请我尝试在没有图片的情况下做UIImage，用户可以选择他想要的图片！用户完全退出应用后，用户选择的图像必须保持不变，这一点很重要。他可以随时更改它，看看他想要什么图片显示在头像上(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，您希望将图像存储在 As 中，如果用户也从应用程序注销。

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)
        }
    }
}

要取回图像：-

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
}

希望这对你有帮助。

您可以使用"场景喜欢"。最初，图像视图将为"空"。

1. 用户将使用选取器视图选择图像。
2. 它将存储在文档目录中
3. 用户从应用程序注销
4. 用户登录回应用程序(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显示或空白(
5. 用户可以更改个人资料图片和步骤1-4重复

编辑 ： 集成在你 代码：

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)
}}

可能这会对你有所帮助。让我知道它是否有效