Support multiple aspect ratio in Unity

Question

I've been trying to create a Unity 2D game that supports each and every aspect ratios of devices for both android and tablets. Is there a way to do so that's been provided or recommended by Unity?

Answer 1

There are a few things that should be considered. The first is what elements should be allowed to scale? There are two categories, namely UI and Game Elements.

The Game Elements portion can mean a lot of things. If the game space is limited, the key is typically, including a generous portion of "negative space", or parts of the image that don't affect the game play significantly. For instance, the below image could be cropped from the left and right without affecting the image significantly. Put the center part of the image as the key element, or one side.

One could also stretch the elements, although that might lead to undesirable effects. Having a surplus of image and testing with different aspect rations is the best way typically for such background elements. These background elements can be placed in the background, with the canvas being set to "Scale With Screen Size", and setting the "Screen Match Mode" to the effect that works best for your image. See "Canvas Scaler" for more information.

As for the other UI elements, the key is to use anchor points. You can tell a UI element to take either a number of pixels, or fill a portion of the screen, when you place it. Look at the "Rect Transform" component included with each such UI object. You can adjust these on the screen as well.

Lastly, you could do it programmatically. There exists Screen.height and Screen.width. You could adjust the objects as desired in run time to make it work. I suggest you don't do this for everything, but it might help in some cases.