How can I convert string date to NSDate? - ios

Question

I want to convert 2016-03-09 00:00:00 to 09/03/2016
I am try below code but print nil value
var date: [String] = ["2016-03-09 00:00:00", "2016-03-20 00:00:00"]
for i in date {
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "dd/MM/YYYY"
let showDate = dateFormatter.dateFromString(i)
print(showDate)
}
above code print nil
pls help me how to print date dd/MM/YYYY format in swift

Answer 1

I think your date format is wrong. change "dd/MM/YYYY" with "YYYY-MM-dd HH:mm:s" and try ...
You have a date like "2016-03-09 00:00:00" .. so format should be "YYYY-MM-dd HH:mm:s"
for i in date {
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "YYYY-MM-dd HH:mm:s"
if let showDate = dateFormatter.dateFromString(i){
print("Date with Time: \(showDate)")
dateFormatter.dateFormat = "YYYY-MM-dd"
let resultString = dateFormatter.stringFromDate(showDate)
print("final result: \(resultString)")
}
}
Result:-
Date with Time: 2016-03-09 00:00:00 +0000
final result: 2016-03-09
Date with Time: 2016-03-20 00:00:00 +0000
final result: 2016-03-20

Answer 2

You should first create a dateformatter to handle the type. Then sort your format such as:
let date: [String] = ["2016-03-09 00:00:00", "2016-03-20 00:00:00"]
for i in date {
let dateFormatter = NSDateFormatter()
dateFormatter.dateFormat = "YYYY-MM-dd HH:mm:s"
let showDate:NSDate? = dateFormatter.dateFromString(i)
dateFormatter.dateFormat = "dd/MM/YYYY"
let date = dateFormatter.stringFromDate(showDate!)
print(date)
}

Answer 3

Rather than reconfiguring a single date formatter on each pass through the loop in #ElCaptain's answer I would suggest creating 2 outside the loop: an input date formatter for converting from "YYYY-MM-dd HH:mm:s" date strings to NSDates, and an output formatter for converting from NSDates to "YYYY-MM-dd" format.
let inputFormatter = NSDateFormatter()
inputFormatter.dateFormat = "YYYY-MM-dd HH:mm:s"
let outputFormatter = NSDateFormatter()
ourputFormatter.dateFormat = "YYYY-MM-dd"
for i in date {
if let showDate = inputFormatter.dateFromString(i) {
print("Date with Time: \(showDate)")
let resultString = outputFormatter.stringFromDate(showDate)
print("final result: \(resultString)")
}
}