Question

在我的应用中，我会得到这样的日期和时间：

let date = Date()
        let calendar = Calendar.current
        let hour = calendar.component(.hour, from: date)
        let minute = calendar.component(.minute, from: date)
        let second = calendar.component(.second, from: date)
        let year = calendar.component(.year, from: date)
        let month = calendar.component(.month, from: date)
        let day = calendar.component(.day, from: date)

并像这样显示日期和时间：

let dateAndTime = ("\(day)-\(month)-\(year) at: \(hour):\(minute):\(second)")

这很好，但是如果minute和second为<10，我希望它在分钟和秒的前面显示0，如下所示：
11-8-2019 at: 21:06:03
我该怎么办

Answer 1

尝试使用 DateFormatter 获取所需的日期格式。

1。。使用dateFormat，即

let date = Date()
let formatter = DateFormatter()
formatter.dateFormat = "dd-MMM-yyy hh:mm:ss a"
print(formatter.string(from: date)) //13-Aug-2019 11:15:47 AM

2。。使用dateStyle和timeStyle，即

let date = Date()
let formatter = DateFormatter()
formatter.dateStyle = .medium
formatter.timeStyle = .medium
print(formatter.string(from: date)) //Aug 13, 2019 at 11:15:16 AM

显示日期和时间

1 个答案: