添加了这个脚本后

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.UI;

using UnityEngine.EventSystems;

public class MyScoll : MonoBehaviour,IBeginDragHandler,IEndDragHandler {

private ScrollRect scrollRect;

private float[] pageArray = new float[]{0,0.333f,0.666f,1};

// Use this for initialization

void Start () {

scrollRect = GetComponent<ScrollRect> ();

}

// Update is called once per frame

void Update () {

}

public void OnBeginDrag(PointerEventData eventData){

}

public void OnEndDrag(PointerEventData eventData){

float posX = scrollRect.horizontalNormalizedPosition;

print (posX);

int index = 0;

float offset = Mathf.Abs (pageArray [index] - posX);

for (int i = 0 ; i< pageArray.Length ; i++){

float offsetTemp = Mathf.Abs (pageArray [i] - posX);

if (offsetTemp < offset) {

index = i;

offset = offsetTemp;

}

}

}

}

UNITY 报错，提示

NullReferenceException: (null)
UnityEditor.SerializedObject..ctor (UnityEngine.Object[] objs, UnityEngine.Object context) (at C:/buildslave/unity/build/artifacts/generated/common/editor/SerializedPropertyBindings.gen.cs:87)
UnityEditor.Editor.GetSerializedObjectInternal () (at C:/buildslave/unity/build/artifacts/generated/common/editor/EditorBindings.gen.cs:193)
UnityEditor.Editor.get_serializedObject () (at C:/buildslave/unity/build/artifacts/generated/common/editor/EditorBindings.gen.cs:185)
UnityEditor.MaterialEditor.OnEnable () (at C:/buildslave/unity/build/Editor/Mono/Inspector/MaterialEditor.cs:1773)

点击后无法定位到是哪行代码出错