快速显示大写的AM/PM [英] Show AM/PM in capitals in swift

问题描述

我编写了以下代码以特定格式显示日期时间:

I wrote the following code to show a datetime in a particular format:

let formatter = NSDateFormatter()
formatter.dateStyle = NSDateFormatterStyle.LongStyle
formatter.timeStyle = .MediumStyle
formatter.dateFormat = "HH:mm a 'on' MMMM dd, yyyy"
let dateString = formatter.stringFromDate(newDate!)
println(dateString)

输出

12:16 pm on July 17, 2015

我想将"pm"显示为"PM"(用大写字母表示)，如果电话具有24小时格式，则AM/PM不应出现.请帮我.

I want to show 'pm' as 'PM'(in capitals) and if phone has 24 hours format then AM/PM should not appear. Please help me.

推荐答案

您可以如下设置DateFormatter amSymbol和pmSymbol:

You can set your DateFormatter amSymbol and pmSymbol as follow:

Xcode 8.3•Swift 3.1

let formatter = DateFormatter()
formatter.locale = Locale(identifier: "en_US_POSIX")
formatter.dateFormat = "h:mm a 'on' MMMM dd, yyyy"
formatter.amSymbol = "AM"
formatter.pmSymbol = "PM"

let dateString = formatter.string(from: Date())
print(dateString)   // "4:44 PM on June 23, 2016\n"

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