类似Notes应用的iOS UITextView无序/有序列表

// 创建UITextView对象
let textView = UITextView(frame: CGRect(x: 0, y: 0, width: 200, height: 200))

// 设置文本属性
let attributes: [NSAttributedString.Key: Any] = [
    .font: UIFont.systemFont(ofSize: 16),
    .foregroundColor: UIColor.black
]
let attributedText = NSMutableAttributedString(string: "列表示例\n", attributes: attributes)

// 设置段落样式
let paragraphStyle = NSMutableParagraphStyle()
paragraphStyle.headIndent = 20 // 缩进
paragraphStyle.firstLineHeadIndent = 20 // 首行缩进

// 创建无序列表项
let bulletList = "\u{2022}" // 圆点符号
let bulletAttributes: [NSAttributedString.Key: Any] = [
    .font: UIFont.systemFont(ofSize: 16),
    .foregroundColor: UIColor.black,
    .paragraphStyle: paragraphStyle
]
let bulletText = NSMutableAttributedString(string: "\(bulletList) 无序列表项1\n", attributes: bulletAttributes)
attributedText.append(bulletText)

// 创建有序列表项
let numberList = "1." // 数字标记
let numberAttributes: [NSAttributedString.Key: Any] = [
    .font: UIFont.systemFont(ofSize: 16),
    .foregroundColor: UIColor.black,
    .paragraphStyle: paragraphStyle
]
let numberText = NSMutableAttributedString(string: "\(numberList) 有序列表项1\n", attributes: numberAttributes)
attributedText.append(numberText)

// 将设置好的文本赋值给UITextView
textView.attributedText = attributedText