ios - NSDateComponents 不返回日期

Question

我正在尝试从 2 个变量获取数据:hours = "08" 和 minutes = 30。我是这样做的:

let calendar = NSCalendar(identifier: NSCalendarIdentifierGregorian)
let components = NSDateComponents()
components.hour = hours.toInt()!
components.minute = minutes.toInt()!
let neededDate = components.date

但是 neededDate 为零。也许我做错了什么？

Answer 1

如果你想在这个方向上使用 NSDateComponents，你必须设置日历。

let calendar = NSCalendar(identifier: NSCalendarIdentifierGregorian)!
let components = NSDateComponents()

components.calendar = calendar // Add this line

components.hour = hours.toInt()!
components.minute = minutes.toInt()!
let neededDate = components.date