How to subtract 1 hour from current time using Swift?

To subtract hours from a date in swift we need to create a date first. Once that date is created we have to subtract hours from that, though swift does not provide a way to subtract date or time, but it provides us a way to add date or date component in negative value. In this example we’ll see how we can achieve the same.

Let’s create a date first, let it be today,

let today = Date()

Now to modify this date we’ll use the add function with negative value,

let modifiedDate = Calendar.current.date(byAdding: .hour, value: -2, to: today)!

Now to see the difference between both the dates, let’s add print statement for both of these. Our complete code should now look like this.

let today = Date()
print(today)
let modifiedDate = Calendar.current.date(byAdding: .hour, value: -2, to: today)!
print(modifiedDate)

When we run the above code on a playground simulator we get the following result, which shows exactly a difference of two hours in both the date, and the modified date.

Jennifer Nicholas

Published on 21-Jan-2019 12:00:58

• Related Questions & Answers
• Java Program to subtract hours from current time using Calendar.add() method
• Subtract minutes from current time using Calendar.add() method in Java
• Subtract seconds from current time using Calendar.add() method in Java
• Insert current time minus 1 hour to already inserted date-time records in MYSQL
• Subtract days from current date using Calendar.DATE in Java
• Java Program to subtract months from current date using Calendar.add() method
• Java Program to subtract week from current date
• Java Program to subtract year from current date
• C# program to convert time from 12 hour to 24 hour format
• Python program to convert time from 12 hour to 24 hour format
• C++ program to convert time from 12 hour to 24 hour format
• How to convert 12-hour time scale to 24-hour time in R?
• How to subtract 10 days from the current datetime in MySQL?
• How to subtract 30 days from the current datetime in MySQL?
• Convert time from 24 hour clock to 12 hour clock format in C++