[英]How to handle two possible date formats?
My app calls a web api that sometimes returns json dates in this format: 我的应用调用了一个Web API,有时会以这种格式返回json日期:
"2017-01-18T10:49:00Z"
and sometimes in this format: 有时采用以下格式:
"2017-02-14T19:53:38.1173228Z"
I can use the following dateformat to convert the 2nd one to a Date object: 我可以使用以下日期格式将第二个日期格式转换为日期对象:
formatter.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
But of course it doesn't work for the 1st one. 但是,当然,它不适用于第一个。
I've tried utilities like https://github.com/melvitax/DateHelper to see if it will work, but I haven't found a way to convert a json date (in any format) into a Date object. 我已经尝试过使用https://github.com/melvitax/DateHelper之类的实用程序来查看其是否有效,但是我还没有找到将json日期(任何格式)转换为Date对象的方法。
Any recommendations? 有什么建议吗?
Try both formats: 尝试两种格式:
let parser1 = DateFormatter()
parser1.dateFormat = "yyyy-MM-dd'T'HH:mm:ssZ"
let parser2 = DateFormatter()
parser2.dateFormat = "yyyy-MM-dd'T'HH:mm:ss.SSSZ"
func parse(_ dateString: String) -> Date? {
let parsers = [parser1, parser2]
for parser in parsers {
if let result = parser.date(from: dateString) {
return result
}
}
return nil
}
print(parse("2017-01-18T10:49:00Z"))
print(parse("2017-02-14T19:53:38.1173228Z"))
Also note that the Z
in the format is not a literal value. 另请注意,格式中的
Z
不是文字值。
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