How to check whether one date is similar to another
Swift version: 5.1
Apple’s Calendar object gives us lots of useful methods for evaluating dates in various ways. One of the most useful is the method isDate(_:equalTo:toGranularity:), which lets us compare two dates at a specific level of granularity: do these two dates occur in the same minute? The same hour? Or day, week, year?
As an example, here are two dates for us to work with:
let first = Date()
let second = Date().addingTimeInterval(10000)We can now check whether those two occur within the same day, like this:
let sameDay = Calendar.current.isDate(first, equalTo: second, toGranularity: .day)If all you want to do is check whether a date points to some time during today, you should use isDateInToday() instead:
let isToday = Calendar.current.isDateInToday(first)
SPONSORED Catch bugs as soon as they happen and know exactly why a crash occurred by integrating Instabug's SDK in one minute. You will automatically receive device data, network logs, and reproduction steps with every bug and crash report.
Sponsor Hacking with Swift and reach the world's largest Swift community!
Available from iOS 8.0
Similar solutions…
- How to create live playgrounds in Xcode
- How to count objects in a set using NSCountedSet
- Building a menu using List
- SwiftUI tips and tricks
- How to use Instruments to profile your SwiftUI code and identify slow layouts
About the Swift Knowledge Base
This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.
