How to show an outlined GUI Box in Unity?

问题

I would like to show a transparent GUI.Box on screen with a colored border. How can I do this?

回答1:

1. Create a PNG image with a transparent center and a border with your desired thickness. The size of the image doesn't matter, but the border around the image should be your desired border size. For instance, I created the 64 x 64 image with a 2px green border on Pixilart.

2. Add the PNG as a 2D texture in your project. You can drag the image from Finder into your Assets pane to do this.

3. Use the following GUI.Box invocation:

public Texture2D BoxBorder; // Set this to your border texture in the Unity Editor

void OnGUI()
{
    var borderSize = 2; // Border size in pixels
    var style = new GUIStyle();
//Initialize RectOffset object
    style.border = new RectOffset(borderSize, borderSize, borderSize, borderSize);
    style.normal.background = BoxBorder;
    GUI.Box(new Rect(/* rect position */), GUIContent.none, style);
}

来源：https://stackoverflow.com/questions/62224353/how-to-show-an-outlined-gui-box-in-unity