15、0 +。

iPadOS 15 . 0 +

macOS 12 . 0 +

Mac Catalyst 15.0+，

tvOS 15.0+，

watchOS 8.0+，

Xcode 13.0+

使用格式化(日期:时间:)

let now = Date.now
let date = now.formatted(date: .abbreviated, time: .omitted)

你可以使用另一种DateStyle，如.long， .numeric或定义自定义格式，而不是。缩写。

迅捷用户界面

 Text(myDate, format: Date.FormatStyle(date: .numeric, time: .omitted))

或者简单地使用:

 Text(myDate, style: .date)

参考

格式化(日期:时间:)

init() _:格式:

文本。DateStyle

格式日期的另一个有趣的可能性。此截图属于苹果App“News”。

代码如下:

let dateFormat1 = DateFormatter()
dateFormat1.dateFormat = "EEEE"
let stringDay = dateFormat1.string(from: Date())

let dateFormat2 = DateFormatter()
dateFormat2.dateFormat = "MMMM"
let stringMonth = dateFormat2.string(from: Date())

let dateFormat3 = DateFormatter()
dateFormat3.dateFormat = "dd"
let numDay = dateFormat3.string(from: Date())

let stringDate = String(format: "%@\n%@ %@", stringDay.uppercased(), stringMonth.uppercased(), numDay)

对于lorenzoliveto提出的替代方案，没什么可补充的。太完美了。

let dateFormat = DateFormatter()
dateFormat.dateFormat = "EEEE\nMMMM dd"
let stringDate = dateFormat.string(from: Date()).uppercased()

Swift 3及以上

let dateFormatter = DateFormatter()
dateFormatter.dateStyle = .medium
dateFormatter.timeStyle = .none
dateFormatter.locale = Locale.current
print(dateFormatter.string(from: date)) // Jan 2, 2001

当你想本地化你的应用程序时，这也是有帮助的。Locale(identifier:)使用ISO 639-1代码。 请参见Apple文档

在iOS 15中使用如下代码:

extension Date {
    var string: String {
        if #available(iOS 15.0, *) {
            return self.formatted(date: .complete, time: .complete)
        } else {
            return self.description
        }
    }
}

将@BatyrCan转换为Swift 5.3的额外格式。在Xcode 12中测试。

let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "HH:mm:ss"
var dateFromStr = dateFormatter.date(from: "12:16:45")!

dateFormatter.dateFormat = "hh:mm:ss a 'on' MMMM dd, yyyy"
//Output: 12:16:45 PM on January 01, 2000

dateFormatter.dateFormat = "E, d MMM yyyy HH:mm:ss Z"
//Output: Sat, 1 Jan 2000 12:16:45 +0600

dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
//Output: 2000-01-01T12:16:45+0600

dateFormatter.dateFormat = "EEEE, MMM d, yyyy"
//Output: Saturday, Jan 1, 2000

dateFormatter.dateFormat = "MM-dd-yyyy HH:mm"
//Output: 01-01-2000 12:16

dateFormatter.dateFormat = "MMM d, h:mm a"
//Output: Jan 1, 12:16 PM

dateFormatter.dateFormat = "HH:mm:ss.SSS"
//Output: 12:16:45.000

dateFormatter.dateFormat = "MMM d, yyyy"
//Output: Jan 1, 2000

dateFormatter.dateFormat = "MM/dd/yyyy"
//Output: 01/01/2000

dateFormatter.dateFormat = "hh:mm:ss a"
//Output: 12:16:45 PM

dateFormatter.dateFormat = "MMMM yyyy"
//Output: January 2000

dateFormatter.dateFormat = "dd.MM.yy"
//Output: 01.01.00

//Customisable AP/PM symbols
dateFormatter.amSymbol = "am"
dateFormatter.pmSymbol = "Pm"
dateFormatter.dateFormat = "a"
//Output: Pm

// Usage
var timeFromDate = dateFormatter.string(from: dateFromStr)
print(timeFromDate)

    import UIKit
    // Example iso date time
    let isoDateArray = [
        "2020-03-18T07:32:39.88Z",
        "2020-03-18T07:32:39Z",
        "2020-03-18T07:32:39.8Z",
        "2020-03-18T07:32:39.88Z",
        "2020-03-18T07:32:39.8834Z"
    ]


    let dateFormatterGetWithMs = DateFormatter()
    let dateFormatterGetNoMs = DateFormatter()

// Formater with and without millisecond 
    dateFormatterGetWithMs.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
    dateFormatterGetNoMs.dateFormat = "yyyy-MM-dd'T'HH:mm:ss'Z'"

    let dateFormatterPrint = DateFormatter()
    dateFormatterPrint.dateFormat = "MMM dd,yyyy"

    for dateString in isoDateArray {
        var date: Date? = dateFormatterGetWithMs.date(from: dateString)
        if (date == nil){
            date = dateFormatterGetNoMs.date(from: dateString)
        }
        print("===========>",date!)
    }