在 Swift 中将字符串转换为日期 [英] Convert string to date in Swift

问题描述

如何将这个字符串 "2016-04-14T10:44:00+0000" 转换为 NSDate 并只保留年、月、日、小时?

How can I convert this string "2016-04-14T10:44:00+0000" into an NSDate and keep only the year, month, day, hour?

中间的 T 确实颠覆了我在处理日期时的习惯.

The T in the middle of it really throws off what I am used to when working with dates.

推荐答案

• 将 ISO8601 字符串转换为日期

  • Convert the ISO8601 string to date

    let isoDate = "2016-04-14T10:44:00+0000"
    
    let dateFormatter = DateFormatter()
    dateFormatter.locale = Locale(identifier: "en_US_POSIX") // set locale to reliable US_POSIX
    dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
    let date = dateFormatter.date(from:isoDate)!
    

  • 从日期中获取年、月、日和小时的日期组件

  • Get the date components for year, month, day and hour from the date

    let calendar = Calendar.current
    let components = calendar.dateComponents([.year, .month, .day, .hour], from: date)
    

  • 最后创建一个新的Date对象并去掉分​​秒

    let finalDate = calendar.date(from:components)
    

  还要考虑 iOS 10/macOS 12 中引入的便利格式化程序 ISO8601DateFormatter:

  Consider also the convenience formatter ISO8601DateFormatter introduced in iOS 10 / macOS 12:

  let isoDate = "2016-04-14T10:44:00+0000"
  
  let dateFormatter = ISO8601DateFormatter()
  let date = dateFormatter.date(from:isoDate)!
  

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