如何保存用戶用swift選擇的圖像？

在我製作的應用程序中，用戶將選擇一張照片，然後它會出現在imageview中。我如何保存他們在image.xcassets文件夾中選擇的圖像，因此當我重新啓動應用程序時，圖像仍然存在？如何保存用戶用swift選擇的圖像？

下面是我使用的代碼...

import UIKit 

class ViewController: UIViewController, UIImagePickerControllerDelegate, UINavigationControllerDelegate { 

    @IBOutlet weak var imageView: UIImageView! 
    override func viewDidLoad() { 
     super.viewDidLoad() 
     // Do any additional setup after loading the view, typically from a nib. 
    } 

    override func didReceiveMemoryWarning() { 
     super.didReceiveMemoryWarning() 
     // Dispose of any resources that can be recreated. 
    } 

    @IBAction func Action(sender: AnyObject) { 

     if UIImagePickerController.isSourceTypeAvailable(UIImagePickerControllerSourceType.Camera) { 

      let imagePicker:UIImagePickerController = UIImagePickerController() 
      imagePicker.delegate = self 
      imagePicker.sourceType = UIImagePickerControllerSourceType.Camera 
      imagePicker.allowsEditing = false 

      self.presentViewController(imagePicker, animated: true, completion: nil) 




     } 

    } 






    func imagePickerController(picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [NSObject : AnyObject]) { 




      self.dismissViewControllerAnimated(true, completion: nil) 

      self.imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage 

//how do i save the image in the folder? 
     } 





    }

來源

2015-04-01 nachshon fertel

一個可能的解決方案是創建一個CoreData對象做，並保存圖像出現作爲base64編碼的字符串。這樣下次打開應用程序時，您可以從CoreData獲取圖像並在重新啓動時顯示它。請參閱http://stackoverflow.com/a/11251478/1457357瞭解使用base64進行編碼和解碼的最佳解釋。 – 2015-04-01 15:00:34

你可以這樣做

var finalImage : UIImage() 

//Your Method 
func saveImage() { 

     self.imageView.image = info[UIImagePickerControllerOriginalImage] as? UIImage 
     self.finalImage = self.imageView.image as UIImage 

     let nsDocumentDirectory = NSSearchPathDirectory.DocumentDirectory 
     let nsUserDomainMask = NSSearchPathDomainMask.UserDomainMask 
     if let paths = NSSearchPathForDirectoriesInDomains(nsDocumentDirectory, nsUserDomainMask, true) { 

     if paths.count > 0 { 
     if let dirPath = paths[0] as? String { 
     let readPath = dirPath.stringByAppendingPathComponent("Image.png") 
     let image = UIImage(named: readPath) 
     let writePath = dirPath.stringByAppendingPathComponent("Image2.png") 
     UIImagePNGRepresentation(self.finalImage).writeToFile(writePath, atomically: true) 
    } 
    } 
} 


}

來源

2015-04-01 15:01:56

如何保存用戶用swift選擇的圖像？

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