在 Swift 中查找 2 个日期之间的差异

Question

I'm wondering if there's a way to compare two dates in Swift. I'm using dates to keep track of my timer when the app goes into the background, and also to track when people use a certain feature of my app. I'm currently using two Date() variables and use math to compare the two calendar.DateComponents() of the two dates. I'm sure Swift must have an easier way to get the difference between two DateComponents , but I don't know how to do this. I would like to get the difference between the two dates in seconds. I'm using XCode 11.4, Swift 5. Thanks!

Answer 1

You don't need DateComponents then. Date has a distance(to:) method that returns the difference in seconds:

let diff = someDate.distance(to: anotherDate)