Undo.PerformUndo 执行撤销

using UnityEngine;
using UnityEditor;

//Performs an Undo the number of times specified.
//执行指定的撤销次数
public class PerformVariousUndo : ScriptableWizard {
	public int numberOfSteps = 5;

	[MenuItem ("Example/Perform Various Undo %#u")]
	static void ExecuteMenu() {
	ScriptableWizard.DisplayWizard(
	"Perform various Undo at the same time",
	typeof(PerformVariousUndo),
	"Undo!");
	}

	void OnWizardCreate() {
		// We have to make this in order to make the undo
		// dont reset the value entered in the inspector
		int savedNumberOfSteps = numberOfSteps + 1;
		for(int i = 0; i < savedNumberOfSteps; i++) {
			Undo.PerformUndo();
		}
	}
}