How to convert an NSTimeInterval (seconds) into minutes

user_77449 0
Viewed 176433

I've got an amount of seconds that passed from a certain event. It's stored in a NSTimeInterval data type.

I want to convert it into minutes and seconds.

For example I have: "326.4" seconds and I want to convert it into the following string: "5:26".

What is the best way to achieve this goal?

Thanks.

minute seconds nstimeinterval objective-c iphone
12 Answers

pseudo-code:

minutes = floor(326.4/60)
seconds = round(326.4 - minutes * 60)
user_30780

Since it's essentially a double...

Divide by 60.0 and extract the integral part and the fractional part.

The integral part will be the whole number of minutes.

Multiply the fractional part by 60.0 again.

The result will be the remaining seconds.

Admin1

Remember that the original question is about a string output, not pseudo-code or individual string components.

I want to convert it into the following string: "5:26"

Many answers are missing the internationalization issues, and most doing the math computations by hand. All just so 20th century...

Do not do the Math yourself (Swift 4)

let timeInterval: TimeInterval = 326.4
let dateComponentsFormatter = DateComponentsFormatter()
dateComponentsFormatter.unitsStyle = .positional
if let formatted = dateComponentsFormatter.string(from: timeInterval) {
    print(formatted)
}

5:26

Leverage on libraries

If you really want individual components, and pleasantly readable code, check out SwiftDate:

import SwiftDate
...
if let minutes = Int(timeInterval).seconds.in(.minute) {
    print("\(minutes)")
}

5

Credits to @mickmaccallum and @polarwar for adequate usage of DateComponentsFormatter

user_2181520
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