How do I write dispatch_after GCD in Swift 3, 4, and 5?

How to Write dispatch_after GCD in Swift 3, 4, and 5? 🕒🚀

Are you scratching your head wondering how to use dispatch_after in different versions of Swift? Don't worry, we've got you covered! In this guide, we'll walk you through the preferred ways to write dispatch_after in Swift 3, 4, and 5, addressing common issues and providing easy solutions. So buckle up and let's dive in! 💪

The Old Way in Swift 2 ⏳

In Swift 2, you were able to use dispatch_after to delay an action using Grand Central Dispatch (GCD). Here's an example of how it was done:

var dispatchTime: dispatch_time_t = dispatch_time(DISPATCH_TIME_NOW, Int64(0.1 * Double(NSEC_PER_SEC))) 
dispatch_after(dispatchTime, dispatch_get_main_queue(), { 
    // your function here 
})

⚠️ However, this code will no longer compile in Swift 3 and newer versions. So let's move on to the preferred solutions! 🚀

Solution for Swift 3 🎉

In Swift 3, Apple introduced a more Swift-like API for GCD. To achieve the same behavior as dispatch_after, you can use the DispatchTime struct. Here's how you can rewrite the previous code:

let dispatchTime = DispatchTime.now() + 0.1
DispatchQueue.main.asyncAfter(deadline: dispatchTime) {
    // your function here
}

Voilà! 🎈 You've successfully written dispatch_after in Swift 3 using the new API. But what about Swift 4 and 5? Let's find out!

Solutions for Swift 4 and 5 🌟

Lucky for us, the API introduced in Swift 3 is still valid in Swift 4 and 5. So you can continue using the same code we provided earlier for Swift 3.

let dispatchTime = DispatchTime.now() + 0.1
DispatchQueue.main.asyncAfter(deadline: dispatchTime) {
    // your function here
}

No need to worry about compatibility issues. This code will work seamlessly in Swift 4 and 5 as well. How cool is that? 😉

Conclusion and Your Turn ✅

Now that you know the preferred ways to write dispatch_after in Swift 3, 4, and 5, you can confidently tackle any task that requires a delayed action with GCD. Remember, the new API introduced in Swift 3 makes code more readable and Swift-like.

If you found this guide helpful, don't hesitate to share it with your fellow Swift developers! And if you have any questions or different approaches you'd like to share, feel free to leave a comment below. Happy coding! 💻🔥