我有一个返回对象日期的响应,有时会返回年份,有时会返回ISO8601DateFormatter样式的日期(1995-01-01T00:00:00Z)
问题是我如何得到一个if let,它可以识别值是一年的字符串或字符串的ISO8601Date。
答案 0 :(得分:1)
我最终这样做了:
let pulledDate = "1995-01-01T00:00:00Z"
let dateFormatter = ISO8601DateFormatter()
dateFormatter.formatOptions = [.withYear, .withMonth, .withDay, .withTime, .withDashSeparatorInDate, .withColonSeparatorInTime]
if let date = dateFormatter.date(from: pulledDate ?? ""){
let units: Set<Calendar.Component> = [.year]
let comps = Calendar.current.dateComponents(units, from: date)
print("It is a date year = \(comps.year)")
}
else{
print("It is not a date")
}