NSDateFormatter 具有 24 小时时间

使用24小时时间格式的NSDateFormatter是一个非常方便的工具，它可以帮助我们在iOS应用程序中处理时间和日期的显示和解析。在本文中，我们将介绍如何使用NSDateFormatter来生成自然语言的文章，并提供一些案例代码来帮助您更好地理解。

swift
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm:ss"
let currentTime = Date()
let currentTimeString = dateFormatter.string(from: currentTime)
let article = "当前时间是" + currentTimeString
print(article)

swift
let targetTime = "17:30:00"
if let time = dateFormatter.date(from: targetTime) {
    let targetTimeString = dateFormatter.string(from: time)
    let article = "特定时间是" + targetTimeString
    print(article)
} else {
    print("无效的时间格式")
}

swift
let title = "当前时间"
let article = title + "是" + currentTimeString
let attributedString = NSMutableAttributedString(string: article)
let titleRange = (article as NSString).range(of: title)
attributedString.addAttribute(.font, value: UIFont.boldSystemFont(ofSize: 16), range: titleRange)
attributedString.addAttribute(.foregroundColor, value: UIColor.red, range: titleRange)
print(attributedString)