Question

我无法完全删除图片和所有＆＃34;元数据＆＃34;来自NSMutableAttributedString中的NSAttachMent。为了对我的场景给出高级别的解释 - 用户可以将图像或文本上传到社交媒体源。我使用UITextView作为文本和图像的输入和显示。所以我的想法是，如果用户想要插入消息和图像（反之亦然），我使用下面的代码：

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

    let image = info[UIImagePickerControllerOriginalImage] as? UIImage

    imagePicker?.dismissViewControllerAnimated(true, completion: nil)

    let mutableAttrString = NSMutableAttributedString()

    let attachment = NSTextAttachment()

    var width : CGFloat?
    var height : CGFloat?

    let size = CGSizeMake(width!, height!)

    let imgToDisplay = scaleImageWithoutChangingAspect(image!, toSize: size)

    attachment.image = imgToDisplay

    mutableAttrString.appendAttributedString(format.prepAtrributedString(textToStore + "\n", f: UIFont(name: fontRegular, size: 20)!, Color: UIColor.blackColor()))

    let attString = NSAttributedString(attachment: attachment)

    mutableAttrString.appendAttributedString(attString)
    //add this attributed string to the current position.

    self.TextMessage.textStorage.insertAttributedString(mutableAttrString, atIndex: self.TextMessage.selectedRange.location)
    self.TextMessage.attributedText = mutableAttrString
    self.TextMessage.invalidateIntrinsicContentSize()
    self.TextMessage.updateConstraintsIfNeeded()
    self.TextMessage.layoutIfNeeded()
}

以下是我用来尝试从属性文本中删除图片的代码，但是在删除后我看到了一个unicode字符\u{ef}：

let s = self.TextMessage.text

self.TextMessage.resignFirstResponder()

print(s)


let mutAttrString = NSMutableAttributedString(attributedString: self.TextMessage.attributedText)

let range = NSMakeRange(0, mutAttrString.length)

mutAttrString.enumerateAttributesInRange(range, options: NSAttributedStringEnumerationOptions.Reverse) { (OBJS, Range, B) -> Void in
    for s in OBJS {
        if s.0 == "NSAttachment" {
            mutAttrString.removeAttribute(s.0, range: Range)
        }
    }
}


mutAttrString.endEditing()

var insertMessageData = mutAttrString.string

let db = SwiftDatabase()

var ImgData : NSData?

if let i = selectedImage {
    ImgData =   UIImageJPEGRepresentation(i, 0.5)
}

///Insert text and upload image to database.
let tup =  db.insertShowMessage(insertMessageData, data: ImgData,delegate: self)
key_id = tup.KeyId
query = tup.Query

hud = MBProgressHUD.showHUDAddedTo(self.view, animated: true)

我也尝试将文本转换为ASCII，但我仍然看到＆＃34; Meta数据＆＃34; NSTextAttachMent。我没有使用unicode字符，而是看到了＃34;？。＃34;

我非常感谢任何帮助。谢谢！

从NSMutableAttributedString中删除图像（NSTextAttachMent）

0 个答案: