Wayback Machinekoobas.hobune.stream
May JUN Jul
Previous capture 13 Next capture
2021 2022 2023
1 capture
13 Jun 22 - 13 Jun 22
sparklines
Close Help
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by $$anonymous$$ · Nov 15, 2014 at 07:38 PM · componentgenericsextension-methods

Get Generic Type of Component

I am trying to make an extension method for GameObject which will add a Component to that GameObject.

     public static void AddUnknownComponent<T>(this GameObject gameObject){
         gameObject.AddComponent<typeof(T)>();
     }

However, "Only assignment call increment decrement, await, and new object expressions can be used as a statement". Any ideas on how I can get this method to work?

(I am aware of GameObject.AddComponent()...that is not what I am trying to do. Just wanted to keep out any unnecessary details from question.)

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

1 Reply

· Add your reply
  • Sort: 
avatar image
1
Best Answer

Answer by troien · Nov 15, 2014 at 07:46 PM

Get rid of the typeof ;)

And if you are using it to call AddComponent, make it so that it only accepts types that are or that inherrit from component (By adding: where T : [YourTypeHere])

Like so:

 public static void AddUnknownComponent<T>(this GameObject gameObject) where T : Component
     {
          gameObject.AddComponent<T>();
     }

Comment
Add comment · Show 2 · Share
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users
avatar image $$anonymous$$ · Nov 15, 2014 at 07:49 PM 0
Share

For real? I have spent hours on this, and where T : Component was all that was missing? Haha! Thank you so much!

avatar image troien · Nov 15, 2014 at 07:55 PM 0
Share

Well, actually for this error you posted, you need to get rid of the typeof.

But then you still have this error:

the type 'T' cannot be used as type parameter 'T' in the generic type method 'UnityEngine.GameObject.AddComponent()'. There is no boxing conversion or type parameter conversion from 'T' to 'UnityEngine.Component'.

For which you need to add the 'where' ;)

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Follow this Question

Answers Answers and Comments

26 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

How to Copy a Component if it contains List? 1 Answer

Components using Generics 1 Answer

What is the syntax for adding some generic type of component without an object reference? 1 Answer

differences: generic GetComponent. 3 Answers

2D Animation does not start 1 Answer


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges