Hello how can i unwrap and convert reaming time in good way in Swift3?
var _date: Date? var _lastTimestamp: Date self._date = Date() let _interval: TimeInterval = self._lastTimestamp ? _date?.timeIntervalSince(_lastTimestamp!): 0
"Result values in '? :' expression have mismatching types 'TimeInterval?' and 'Int'
The immediate problem you’re having is that
self._date is optional, so this construct:
produces an optional. My preferred way around that is to use a local non-optional reference and then assign it to
self._date when I’m done.
let now = Date() let _interval: TimeInterval = self._lastTimestamp ? now.timeIntervalSince(_lastTimestamp): 0.0 self._date = now
But that still won’t compile because the
self._lastTimestamp to the left of the
? is not a Boolean and I don’t even have a good guess as what you’re trying to do there.
Share and Enjoy
Quinn “The Eskimo!”
Apple Developer Relations, Developer Technical Support, Core OS/Hardware
let myEmail = "eskimo" + "1" + "@apple.com"