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Discover how to streamline coroutine calls in C# and Unity by using delegates to simplify method wrappers.
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This video is based on the question https://stackoverflow.com/q/67627011/ asked by the user 'Tuld' ( https://stackoverflow.com/u/15985104/ ) and on the answer https://stackoverflow.com/a/67627124/ provided by the user 'Peter Duniho' ( https://stackoverflow.com/u/3538012/ ) at 'Stack Overflow' website. Thanks to these great users and Stackexchange community for their contributions.

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Simplifying Coroutine Calls in C# and Unity with Delegate Wrappers

When developing games using C# and the Unity game engine, you might encounter scenarios where managing asynchronous operations can become cumbersome. The following situation illustrates a common challenge: wanting to eliminate repetitive code while maintaining clean and efficient functionality.

In your code, you have two main objectives:

Implement a method call wrapper: You want to call a method yet avoid typing out StartCoroutine() each time or redefining the coroutine method over and over.

Utilize C# features: You're curious if interfaces or delegates can help streamline your code.

Current Implementation: The Problem

Your existing implementation for handling button clicks looks like this:

[[See Video to Reveal this Text or Code Snippet]]

While this setup works, it requires you to always call StartCoroutine(WaitForClose()) and explicitly define the behavior in the WaitForClose method. This can lead to code duplication, especially if other similar methods are needed.

The Desired Outcome

You want to simplify the invocation, making it look like this:

[[See Video to Reveal this Text or Code Snippet]]

To achieve this, we can leverage the power of delegates in C# .

The Solution: Using Delegates

Step 1: Modify the WaitForClose Method

Instead of directly defining the actions inside WaitForClose, you can pass an Action as a parameter. Here’s how to implement it:

[[See Video to Reveal this Text or Code Snippet]]

Step 2: Simplify the Coroutine Call

To make your invocation even cleaner, you can extend the implementation:

[[See Video to Reveal this Text or Code Snippet]]

Benefits of This Approach

Reduced Code Duplication: By using delegates, you avoid rewriting StartCoroutine() and WaitForClose() method each time you need to invoke a method after waiting.

Cleaner Code: The resulting code is easier to read and understand. Each button click now shows clearly what it intends to do.

Increased Flexibility: Since you can pass any method (as long as it matches the Action delegate), this approach allows for versatile usage in your project.

Conclusion

By employing delegates, you can effectively simplify your coroutine implementations in C# and Unity, making the codebase not only cleaner but also easier to maintain. This approach exemplifies how understanding and utilizing C# features can bring about more effective programming practices, ultimately leading to better game development experiences.

Take the time to adapt this approach in your own projects and experience firsthand how it enhances your coding efficiency and clarity.