Question

我创建了一个应用，用户可以在其中选择个人资料照片。它作为NSData保存在文档目录中。我在查找代码时遇到了麻烦，该代码现在允许我检索它并将其显示在UI图像视图中。任何帮助将不胜感激。

let image = UIImagePickerController()
image.delegate = self
image.sourceType = UIImagePickerController.SourceType.photoLibrary
image.allowsEditing = false

self.present(image, animated: true) {
}

@objc func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
    if let image = info[UIImagePickerController.InfoKey.originalImage] as? UIImage {
        profileImageView.image = image

        let imageData: NSData = image.pngData()! as NSData
        var paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
        let documentsPath = paths[0] //Get the docs directory
        let filePath = URL(fileURLWithPath: documentsPath).appendingPathComponent("userprofilephoto.png").absoluteString //Add the file name
        imageData.write(toFile: filePath, atomically: true) //Write the file

        self.dismiss(animated: true, completion: nil)
    } else {
        //error message
    }
}

override func viewDidLoad() {
    super.viewDidLoad()

    profileImageView.layer.cornerRadius = profileImageView.bounds.size.height / 2.0
}

Answer 1

您可以这样获取保存的图像：

var paths = NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)
if let dirPath = paths.first {
   let imageURL = URL(fileURLWithPath: dirPath).appendingPathComponent("userprofilephoto.png")
   let retrieved_img  = UIImage(contentsOfFile: imageURL.path)

   // retrieved_img is your UIImage
}

在UI图像视图中检索并显示保存的图像（文档文件夹）

1 个答案: