2个字符串与新行的NSAttributedString组合

let string1 = "Hello"
let string2 = "World"
let newLine = "\n"

// 创建第一个字符串的属性
let attributes1: [NSAttributedString.Key: Any] = [
    .font: UIFont.boldSystemFont(ofSize: 16),
    .foregroundColor: UIColor.red
]
let attributedString1 = NSAttributedString(string: string1, attributes: attributes1)

// 创建第二个字符串的属性
let attributes2: [NSAttributedString.Key: Any] = [
    .font: UIFont.systemFont(ofSize: 14),
    .foregroundColor: UIColor.blue
]
let attributedString2 = NSAttributedString(string: string2, attributes: attributes2)

// 创建新行的属性
let newLineAttributes: [NSAttributedString.Key: Any] = [
    .font: UIFont.systemFont(ofSize: 14),
    .foregroundColor: UIColor.black
]
let newLineAttributedString = NSAttributedString(string: newLine, attributes: newLineAttributes)

// 创建组合后的NSAttributedString
let combinedAttributedString = NSMutableAttributedString()
combinedAttributedString.append(attributedString1)
combinedAttributedString.append(newLineAttributedString)
combinedAttributedString.append(attributedString2)

// 输出结果
print(combinedAttributedString)