Question

我正在尝试将包含nstextattachment的nsattributed字符串保存在核心数据中，但是在加载视图时，我要保存的数据未加载时并未保存

我已经在coredata中为带有图像的文本创建了一个可转换属性我也将属性类型更改为子类中的nsattributed字符串

override func viewDidLoad() {
        super.viewDidLoad()

        detail = coreDataManager.shared.fetchTransactionDetail(transaction: parentTransaction!)
        textView.attributedText = detail?.textWithImage
}

 @IBAction func doneAction(_ sender: UIBarButtonItem) {
        textView.resignFirstResponder()
        doneButton.isEnabled = false

        parentTransaction?.desc = textView.attributedText.string
        detail?.setValue(self.textView.attributedText, forKey: "textWithImage")
        coreDataManager.shared.saveContext()
    }

 let imagePickerController = UIImagePickerController()

    func imagePickerController(_ picker: UIImagePickerController, didFinishPickingMediaWithInfo info: [UIImagePickerController.InfoKey : Any]) {
// Local variable inserted by Swift 4.2 migrator.
let info = convertFromUIImagePickerControllerInfoKeyDictionary(info)


        let image = info[convertFromUIImagePickerControllerInfoKey(UIImagePickerController.InfoKey.originalImage)] as? UIImage

        let attachment = NSTextAttachment()
        var scalingFactor = 1.0
        let imageSize = image?.size
        let width = textView.frame.size.width
        if (width < imageSize!.width){
            scalingFactor = Double((width)*CGFloat(scalingFactor) / imageSize!.width)
        }
        let rect = CGRect(x: 0, y: 0, width: imageSize!.width*CGFloat(scalingFactor), height: imageSize!.height*CGFloat(scalingFactor))
        let newImage = UIImage(data: (image?.jpegData(compressionQuality: 0.1))!)
        attachment.image = UIImage.resize(image: newImage!, targetSize: rect.size)
        //calculate new size.  (-20 because I want to have a litle space on the right of picture)
        let newImageWidth = (textView.bounds.size.width - 50 )
        scalingFactor = Double(newImageWidth/(image?.size.width)!)
        let newImageHeight = (image?.size.height)! * CGFloat(scalingFactor)

        //resize this
        attachment.bounds = CGRect.init(x: 10, y: 0, width: newImageWidth, height: newImageHeight)

        //put your NSTextAttachment into and attributedString
        let attString = NSAttributedString(attachment: attachment)

        //add this attributed string to the current position.
        textView.textStorage.append(attString)
        textView.font =  UIFont(name: "Arial", size: 18)
        picker.dismiss(animated: true, completion: nil)
    }

  coreDataManager.shared.createTupleDetail(text: "", image: self.image!.jpegData(compressionQuality: 0.1)! as NSData as Data, tuple: self.tupleCells[self.tupleCells.count-1])

它应该保存包含图像的文本，并在加载视图时再次加载但它没有这样做。

将带有图像附件的属性字符串保存在核心数据中

0 个答案: