Data Serialization on iOS with Unity and AOT Problems

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Super quick tip!
I’ve come up with a problem when making a generic data serialization method in which I write my data to a binary file, which is an error that only occurs on iOS because it can’t run JIT ( Just-in-time ) compilation and/or AOT ( Ahead-of-time ) compilation because it doesn’t allow runtime code generation.

There are some answers on Unity Ansers, but this forum post had the same problem as I was, and there is a fix that did it for me, that’s on Unity Answers here with a pretty good explanation.

So, yup, my solution was to add that same piece of code on the file where I am invoking the code.

So just in case, I’ll leave this here for future reference. πŸ˜‰

Simple UIImage Caching in Swift

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This is a snippet of code that will cache images downloaded from an online source, and provide them when needed. I still have some work to do on it, but right now it works pretty fine.

I’m using a dictionary to keep track of the images, with their Base64 encoded urls as keys.

Example usage goes like:

PS: Also, that UIImage().loadAsync is an UIImage Extension method I have lying around πŸ™‚

Change font weight by code in Swift

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This snippet changes the current font of a label to a Light version of it ( in case it exists ). Font names are ( in this case, it was ‘.HelveticaNeue-Regular’ ) appended with their weight. So I get the font name, split it by ‘-‘, and take the first part of the split, ending with ‘.HelveticaNeue’. Now I just create a new font with the light appended to it, with the same size.

Lastly, I switch the font, and there you go.

How to create a recursive call with Unity’s Coroutines

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During the development of Super Stems I’ve had to deal with chain reaction. I started a battle with one tile, and if they win, the captured tile would start a battle, and this would happen recursively. For some reason, I have this battle method call on a different thread, in Unity’s terms, a Coroutine.

Now comes the question. How do I handle recursion with Coroutines? After looking around the doc and experimenting, I found a solution.

Here’s a sample code on how to make it work.

After calling the entry point to your recursive method StartBattle, inside, you have yield return a new Coroutine call to the recursive method. This way, the execution order will be correct. Try it out and see for yourself.

Output should be.

Enjoy

Non Blocking C# Task Cancelling

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In our previous sample snippet, Cancel a Loop in a Task with CancellationTokens in c#Β , I try to explain how we can get out of a looping c# task, but a problem may arise from that situation. If we were to wait for any result out of that Task, we would be blocking the calling thread until the task returned, which is not good if we are on the main thread. We would locking our UI and might crash our application.

So I’ve been testing different ways toΒ get out of that loop without causing any trouble, and you can achieve what we want many different ways.

So, to begin with, I think I would correctly assume that it is only necessary to wait for a task to complete if that task will return something. If there is no return value, why would we want to call wait on it? We can just break out of it, correct me if I’m wrong. If we have a return value, then it is necessary to surround the wait call on the task with try/catch to receive its result. But then again, we can avoid the locking here with a continuation task, which will create and start the task after the first one completes, giving us the result from the previous task to work with.

Continue reading

Measure Method Time Performance

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Quick snippet to let you check the time used by any method you have.

This will write to the console the time spent on the method.

Just remember to use System.Diagnostics.
More info on Stopwatch.

That’s it. Enjoy.

Cancel a Loop in a Task with CancellationTokens in C#

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This post explains the use of Cancellation Token in C# using Tasks, which are available since .Net Framework 4.

Say you’ve created a asynchronous Task. The method you’re running inside your task contains a loop ( infinite or not ), and you want to break out of it peacefully. You would need to create a CancellationTokenSource and pass aΒ Cancellation Token to the Task so it can be accessed in the main loop. Continue reading

Generic Method

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I’ve come up with a pretty neat solution to this:
If you don’t want to write the same method for different data types, you can use generics.

It’s pretty easy once you know what to look for πŸ™‚ Just search Generics c# and you’ll find a bunch of questions and answers on StackOverflow, msdn and CodeProject πŸ™‚
Here’s the solution:

Pretty Cool eh!? πŸ™‚

Now instead of having multiple methods to make the same operation, you have one that works for many types.