DateFormatter returns nil

问题

Why does DateFormatter return nil? I think the string format matches?

let dateString = ("01/05/2017")!
let dateFormatter = DateFormatter()
dateFormatter.timeZone = TimeZone.current
dateFormatter.dateFormat = "dd/MMM/yyyy"
let dateObj = dateFormatter.date(from: dateString)

After executing the code above, the dateObj is nil.

回答1:

For month you need to use MM because MMM is used when you having month in the format like Jan,Feb,Mar and so on. So your dateFormat should be dd/MM/yyyy.

let dateString = "01/05/2017"
let dateFormatter = DateFormatter()
dateFormatter.dateFormat = "dd/MM/yyyy"
let dateObj = dateFormatter.date(from: dateString)

Note: No need to set timeZone to TimeZone.current

回答2:

Replace with your dateFormat:

dateFormatter.dateFormat = "dd/MM/yyyy"

回答3:

date Formatter should be dateFormatter.dateFormat = "dd/MM/yyyy" in this case.

回答4:

You can check various date format from given link

NSDateFormatter

For given example you can use let formaterStrig = "dd/MM/yyyy"

来源：https://stackoverflow.com/questions/44328577/dateformatter-returns-nil