Unity3D在Preview中打印日志的方法

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

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