NSAttributedString获取部分中的图像和字符串

// 创建一个NSMutableAttributedString对象
let attributedString = NSMutableAttributedString(string: "Hello World!")

// 添加一个附件（图像）
let imageAttachment = NSTextAttachment()
imageAttachment.image = UIImage(named: "image.png")
let imageString = NSAttributedString(attachment: imageAttachment)
attributedString.append(imageString)

// 遍历富文本中的所有附件
attributedString.enumerateAttribute(.attachment, in: NSRange(location: 0, length: attributedString.length), options: []) { (value, range, _) in
    if let attachment = value as? NSTextAttachment {
        // 获取附件的图像
        let image = attachment.image
        // 获取富文本中的字符串
        let string = attributedString.string
        
        // 在这里可以对图像和字符串进行处理
        // ...
    }
}