Preview窗口除了可以预览模型之外，我们还可以做别的操作。

今天我们来写个小工具在Preview窗口中显示调试信息。

可以看下面的图，同样是打印 health 和 power 的日志，在 Preview 中显示比在 Console 中显示舒服多了。

左边是Console中显示,右边是Preview窗口中显示。

创建Editor目录，然后把下面的脚本放进去

using UnityEngine;

using UnityEditor;

[CustomEditor(typeof(Object), true)]

public class PreviewGUIEditor : Editor {

/** Update every 15th frame. */

private const int updateOnFrame = 15;

private GUIStyle _previewLabelStyle;

private GUIStyle previewLabelStyle {

get {

if (_previewLabelStyle == null) {

_previewLabelStyle = new GUIStyle("PreOverlayLabel") {

richText = false,

alignment = TextAnchor.UpperLeft,

fontStyle = FontStyle.Normal

};

// Try to get a fixed-width font on macOS.

var font = Font.CreateDynamicFontFromOSFont("Monaco", 12);

// Failing that, try to get a fixed-width font on Windows.

if (font == null)

font = Font.CreateDynamicFontFromOSFont("Lucida Console", 12);

// XXX What fixed-width font should I request if we're on Linux?

if (font != null)

_previewLabelStyle.font = font;

// Debug.Log("Fonts: \n" + string.Join("\n", Font.GetOSInstalledFontNames()));

}

return _previewLabelStyle;

}

}

public override bool HasPreviewGUI() {

return Application.isPlaying;

}

public override bool RequiresConstantRepaint() {

// Only repaint on the nth frame.

return Application.isPlaying && Time.frameCount % updateOnFrame == 0;

}

public override void OnPreviewGUI(Rect rect, GUIStyle background) {

string str = target.ToString();

GUI.Label(rect, str, previewLabelStyle);

}

}

在我们需要打印日志的类里面 重载ToString()函数，返回需要在preview中输出的内容。

下面是上面截图的示例，一个Player类，在ToString()函数中返回了 health 和 power的输出内容。

using UnityEngine;

public class Player : MonoBehaviour

{

public int health = 10;

public int power = 10;

// Use this for initialization

void Start () {

}

// Update is called once per frame

void Update ()

{

health += 1;

power += 2;

Debug.LogError("health = "+ health);

Debug.LogError("power = "+ power);

}

public override string ToString()

{

return "health = " + health+"\n"+

"power = " + power;

}

}

以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。