ios - 连接 2 个 NSAttributedString

Question

我正在尝试连接 2 个 NSAttributedString。但它给我的错误是该方法不可用，而该方法可用。这是我的代码:

let def = "I am using here <ul><li>Coffee</li><li>Tea</li><li>Milk</li></ul> <br/> <a href='http://www.w3schools.com'>Visit W3Schools.com</a>"

    do {

        definition.delegate = self
        definition.editable = false

        let str = try NSAttributedString(data: def.dataUsingEncoding(NSUnicodeStringEncoding, allowLossyConversion: true)!, options: [ NSDocumentTypeDocumentAttribute: NSHTMLTextDocumentType], documentAttributes: nil)

        let textAttachment = NSTextAttachment()
        textAttachment.image = UIImage(named: "clip_image002.jpg")

        let str2 = NSAttributedString(attachment: textAttachment)

        str.appendAttributedString(str2)

        definition.attributedText = str


    } catch {
        print(error)
    }

基本上 str.appendAttributedString(str2) 会产生错误。我缺少什么？

Answer 1

你不能改变 NSAttributedString 的内容，你必须定义你追加的字符串为可变的:

let str = NSMutableAttributedString()

NSMutableAttributedString