I'm working to replace NSAttributedString
with AttributedString
but have been unsuccessful in getting attachments to work. The image doesn't appear in the string despite the fact I applied the attachment.
let textAttachment = NSTextAttachment(image: UIImage(systemName: "exclamationmark.triangle.fill")!)
textAttachment.accessibilityLabel = "Warning"
// Original code
label.attributedText = NSAttributedString(attachment: textAttachment)
// New code
var attributedString = AttributedString()
attributedString.attachment = textAttachment
label.attributedText = NSAttributedString(attributedString)
NSAttributedString(attachment:)
magically creates an NSAttributedString
with a single character (NSAttachmentCharacter
which is U+FFFC OBJECT REPLACEMENT CHARACTER) and applies the text attachment attribute in order to replace that character with the image.
With the new AttributedString
API you'll need to manually replicate that:
let textAttachment = NSTextAttachment(image: UIImage(systemName: "exclamationmark.triangle.fill")!)
textAttachment.accessibilityLabel = "Warning"
let attributedString = AttributedString("\(UnicodeScalar(NSTextAttachment.character)!)", attributes: AttributeContainer.attachment(textAttachment))
label.attributedText = NSAttributedString(attributedString)
Here's an example that replaces a substring with an image:
let addString = "+"
let string = "Tap \(addString) to add a task."
let addTextAttachment = NSTextAttachment(image: UIImage(systemName: "plus.square")!)
// NSAttributedString
label.attributedText = {
let attributedString = NSMutableAttributedString(string: string)
attributedString.replaceCharacters(in: (attributedString.string as NSString).range(of: addString), with: NSAttributedString(attachment: addTextAttachment))
return attributedString
}()
// AttributedString
label.attributedText = {
var attributedString = AttributedString(string)
let attachmentString = AttributedString("\(UnicodeScalar(NSTextAttachment.character)!)", attributes: AttributeContainer.attachment(addTextAttachment))
attributedString.replaceSubrange(attributedString.range(of: addString)!, with: attachmentString)
return NSAttributedString(attributedString)
}()