如何在标签中添加两个NSTextAttachment？

Question

我想在标签中添加2个图标。 我有2张图片：一张是鸟，一张是鸭。

我希望我的标签显示如下文本：

[鸟图像]鸟[鸭图像]鸭。

目前，我只知道在标签中实现一个NSTextAttachment 。

let birdAttachment = NSTextAttachment()
let birdImage = UIImage(named:"bird")
birdAttachment.image = birdImage
let birdString = NSMutableAttributedString(string: "Bird")
let stringWithBirdImage = NSMutableAttributedString(attributedString: NSAttributedString(attachment: birdAttachment))
stringWithBirdImage.appendAttributedString(birdString)

let duckAttachment = NSTextAttachment()
let duckImage = UIImage(named: "duck")
duckAttachment.image = duckImage
let duckString = NSMutableAttributedString(string: "Duck")
let stringWithDuckImage = NSMutableAttributedString(attributedString: NSAttributedString(attachment: duckAttachment))
stringWithDuckImage.appendAttributedString(duckString)
label.attributedText = stringWithBirdImage

那么如何在标签中添加2个NSTextAttachment 。

Answer 1

这是@Khuong和@Larme为简洁起见的一个小调整：

func stringForAttachment(named imageName: String, caption: String) -> NSAttributedString {
    let attachment = NSTextAttachment()
    let image = UIImage(named: imageName)
    attachment.image = image
    let fullString = NSMutableAttributedString(string: caption)
    fullString.appendAttributedString(NSAttributedString(attachment: attachment))
    return fullString
}

let labelText = NSMutableAttributedString()
labelText.appendAttributedString(stringForAttachment(named: "bird", caption: "Bird"))
labelText.appendAttributedString(stringForAttachment(named: "duck", caption: "Duck"))
label.attributedText = labelText

Answer 2

我在评论中关注了@Larme的答案。

let birdAttachment = NSTextAttachment()
let birdImage = UIImage(named:"bird")
birdAttachment.image = birdImage
let birdString = NSAttributedString(string: "Bird")
let stringWithBirdImage = NSAttributedString(attributedString: NSAttributedString(attachment: birdAttachment))

let duckAttachment = NSTextAttachment()
let duckImage = UIImage(named: "duck")
duckAttachment.image = duckImage
let duckString = NSAttributedString(string: "Duck")
let stringWithDuckImage = NSAttributedString(attributedString: NSAttributedString(attachment: duckAttachment))

let finalAttributedString = NSMutableAttributedString(string: "")
finalAttributedString.appendAttributedString(stringWithBirdImage)
finalAttributedString.appendAttributedString(birdString)
finalAttributedString.appendAttributedString(stringWithDuckImage)
finalAttributedString.appendAttributedString(duckString)
label.attributedText = finalAttributedString 

它运作良好。