Hello again, I’m following the Unity 2D course and am having trouble activating a trigger. I wrote the code as in the video, checked “Is Trigger” on the object, added the trigger script to the object as a component, and wrote a Debug.Log message to be displayed in the Console window when I pass through the object. However, even though I did all of these things, the trigger does not work because I every time I go through the object nothing appears on the Console window. I’m not sure what the problem is. Maybe it has to do with coding? Here is a picture of the code I wrote for the trigger. Can you help me find out what the problem is?
Thanks
Here’s another trigger script that I’m having problems with:
You have all the methods inside the start method. The should not be in the start method. Take them out
Ok, I took the code out of the Start Method but it still seems to be giving me problems. Now I’m having compiling errors and I can’t figure out what’s wrong. Here’s what the code looks like now:
OnCollisionEnter is for 3D, so don’t use it if you are doing a 2D game.
Then, OnTriggerEnter2D is broken. It’s just the function name, then an if. Your function need to be enclosed in { }
void OnTriggerEnter2D(Collider2D other)
{ //<-- These
if (other.tag == "Package")
{
Debug.Log("Livraison effectue");
}
} //<-- These
Ok, I did what you said and changed it to OnTriggerEnter2D. I also tried applying more {} to the code. However, it’s still giving me an error message. I’m new when it comes to coding. I know it’s something simple but I can’t seem to figure it out. Here is how the code looks now:
Everything looks fine here now. Except that you didn’t need more {} at OnCollisionEnter2D, but it will still work.
What is the error message you are seeing? And can you post the full class. Don’t paste a screenshot, copy the code. You can see how to format code in this post: How to apply code formatting within your post
Ok, here is the complete code:
…
public class Delivery : MonoBehaviour
{
void OnCollisionEnter2D(Collision2D other)
{
{
Debug.Log("Gramerci");
}
}
void OnTriggerEnter2D(Collider2D other)
{
if (other.tag == "Package")
{
Debug.Log("Livraison effectue");
}
}
…
Also the error message is Assets\Delivery.cs(33,6):errorCS1513:}expected
Your class is missing the last }
Every { must have a matching }
This is your class (formatted)
public class Delivery : MonoBehaviour
{ // d ?? no matching }
void OnCollisionEnter2D(Collision2D other)
{ // a
Debug.Log("Gramerci");
} // a
void OnTriggerEnter2D(Collider2D other)
{ // b
if (other.tag == "Package")
{ // c
Debug.Log("Livraison effectue");
} // c
} // b
That did the trick! However, it’s not time to celebrate yet becaue I have another problem. I made sure to save my level everytime I logged into Unity. However, when I opened the level everything I had on my windows and hierarchy were completely erased! All I had were the scripts and the assets I put in my assets folder. How did that happen? Is there a way to reverse it? And, if not, what do I do to make sure it does not happen again?
Check that Unity didn’t load a blank scene. If it did, your scene will still be where you saved it and you can load it. Else, you may just have to create it again. I don’t think I’ve ever experienced this, so I don’t know what else to tell you
I understand. I keep loading the project and it keeps giving me the same blank scene. Unfortunately, the scene I want to load is not available to load. It seems like I’ll have to do it over again. It’s ok though. Hopefully it won’t happen again 
Thanks for helping me solve the issue I had with coding the trigger. At least the C# scripts I made were salvaged.
Hang on! After some investigation I found the scene I was supposed to load. Next time, I’ll do a better job naming my scenes. Thanks so much for you help! I appreciate it. 
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