NEW! Master Swift design patterns with my latest book! >>

How to check whether a date is inside a date range

Paul Hudson       @twostraws

Everyone knows you can create ranges from two integers such as 1...5, but few people realize the same applies to dates. This means you can create a date range using the same closed-range operator (...) and half-open range operator (..<) you already know, allowing you to check whether one date lies inside a range.

For example, we could create three Date objects like this:

let now = Date()
let soon = Date().addingTimeInterval(5000)
let later = Date().addingTimeInterval(10000)

We can then compare now and later into a single range like this:

let range = now...later

Finally, we can check whether that range contains the soon date using the contains() method of ranges, like this:

if range.contains(soon) {
    print("The date is inside the range")
} else {
    print("The date is outside the range")
}

Available from iOS 8.0

Did this solution work for you? Please pass it on!

Other people are reading…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

Take Swift further!

Your Swift skills let you make apps for macOS, watchOS, tvOS, and more, and for one low price you can learn it all with my Swift Platform Pack!

MASTER SWIFT NOW
Buy Practical iOS 12 Buy Pro Swift Buy Swift Design Patterns Buy Practical iOS 11 Buy Swift Coding Challenges Buy Server-Side Swift (Vapor Edition) Buy Server-Side Swift (Kitura Edition) Buy Hacking with macOS Buy Advanced iOS Volume One Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with Swift Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let me know!

Click here to visit the Hacking with Swift store >>