Unity 4.6 UI Canvas width & height

Question

Is there a way to dynamically get the width & height of the Canvas? or else the top-right coordinates? I can't seem to find it in the docs, but maybe I'm looking for the wrong entry...

Answer 1

I'm not sure exactly when or how you want to display it, but this is what I've been using for my UI scripts.

Just attach a script to your canvas, and stick this in the Start() for a one time display in the console, or in your Update() for it to display every frame...

         RectTransform objectRectTransform = gameObject.GetComponent<RectTransform> ();
         Debug.Log("width: " + objectRectTransform.rect.width + ", height: " + objectRectTransform.rect.height);

Or you can put this into your Update() so you can get the size every time you press the spacebar...

         if (Input.GetKeyDown("space"))
         {
             RectTransform objectRectTransform = gameObject.GetComponent<RectTransform> ();
             Debug.Log("width: " + objectRectTransform.rect.width + ", height: " + objectRectTransform.rect.height);
         }

Of course, this is for the width and height of the object (it works for whatever UI object you attach it to, not just a canvas). I'm not sure if it will give you the proper coordinates, though. I only work with canvases that have the Render Mode set to Screen Space - Overlay, so that's why it works for my projects.

I hope it helps! :-)

Answer 2

Answer by whoopdeedoo03 · Jan 02, 2019 at 06:28 AM

You may also call RectTransform from the canvas itself...

 Canvas canvas = FindObjectOfType<Canvas>();
 
 float h = canvas.GetComponent<RectTransform>().rect.height;
 float w = canvas.GetComponent<RectTransform>().rect.width;

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Unity 4.6 UI Canvas width & height

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