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，也希望大家多多支持。