ios Swift 3 更改日期格式
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Swift 3 changing date format
提问by Jochen ?sterreicher
I want to get my Date in DD.MM.YYYY HH:mm:ss as a String.
我想将 DD.MM.YYYY HH:mm:ss 中的日期作为字符串获取。
I use the following extension:
我使用以下扩展名：
extension Date {
var localTime: String {
return description(with: Locale.current)
}
}
and the following code when my datePicker changes:
以及当我的 datePicker 更改时的以下代码：
@IBAction func datePickerChanged(_ sender: UIDatePicker) {
dateLabel.text = datePicker.date.localTime
let formatter = DateFormatter()
formatter.dateFormat = "dd.MM.yyyy hh:mm"
let TestDateTime = formatter.date(from: datePicker.date.localTime)
}
What am I doing wrong?
我究竟做错了什么？
回答by rmaddy
Your code is completely wrong. Just do the following:
你的代码完全错误。只需执行以下操作：
@IBAction func datePickerChanged(_ sender: UIDatePicker) {
let formatter = DateFormatter()
formatter.dateFormat = "dd.MM.yyyy HH:mm"
dateLabel.text = formatter.string(from: sender.date)
}
This will convert the date picker's chosen date to a string in the format dd.MM.yyyy HH:mmin local time.
这会将日期选择器选择的日期转换dd.MM.yyyy HH:mm为本地时间格式的字符串。
Never use the descriptionmethod to convert any object to a user presented value.
切勿使用该description方法将任何对象转换为用户呈现的值。
回答by Nil Rathod
Just used the function in your code(swift 4.2).
刚刚在您的代码中使用了该函数（swift 4.2）。
public func convertDateFormatter(date: String) -> String {
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"//this your string date format
dateFormatter.timeZone = NSTimeZone(name: "UTC") as TimeZone!
dateFormatter.locale = Locale(identifier: "your_loc_id")
let convertedDate = dateFormatter.date(from: date)
guard dateFormatter.date(from: date) != nil else {
assert(false, "no date from string")
return ""
}
dateFormatter.dateFormat = "HH:mm a"///this is what you want to convert format
dateFormatter.timeZone = NSTimeZone(name: "UTC") as TimeZone!
let timeStamp = dateFormatter.string(from: convertedDate!)
print(timeStamp)
return timeStamp
}
Thanks
谢谢
