Swift -如何在纯文本的末尾追加特定属性文本，同时不更改TextView上前一个文本的属性

// 假设textView是你的UITextView实例
let textView = UITextView()

// 获取当前文本和属性
let currentText = textView.text
let currentAttributes = textView.typingAttributes

// 创建新的带有特定属性的文本
let additionalText = "这是新追加的文本"
let newAttributes: [NSAttributedString.Key: Any] = [
    .foregroundColor: UIColor.red,
    .font: UIFont.boldSystemFont(ofSize: 16)
]

// 创建一个NSAttributedString对象
let attributedAdditionalText = NSAttributedString(string: additionalText, attributes: newAttributes)

// 将当前文本转换为NSAttributedString
let attributedCurrentText = NSAttributedString(string: currentText, attributes: currentAttributes)

// 合并两个NSAttributedString对象
let finalAttributedString = NSMutableAttributedString(attributedString: attributedCurrentText)
finalAttributedString.append(attributedAdditionalText)

// 更新textView的文本和属性
textView.attributedText = finalAttributedString