unity5-iTween空参考

Question

I use iTween a lot and it was OK for most of the time until yesterday, I am getting and error suddenly:

NullReferenceException: Object reference not set to an instance of an object iTween.RetrieveArgs () (at Assets/Plugins/Pixelplacement/iTween/iTween.cs:6811) iTween.Awake () (at Assets/Plugins/Pixelplacement/iTween/iTween.cs:6559) UnityEngine.Object:Instantiate(Object, Vector3, Quaternion)

Initially every time I start the game I get 320 calls of these errors but later it accumulates to 720 and now 999+. I am not sure why it accumulate even though I start the game from scratch all together. Any suggestion?

UPDATE:

To an extend, I believe it is due to Sourcetree that I use for version control. I believe it somehow mess up the meta file or make unity have some sort of conflict internally while looking at iTween.cs .

Answer 1

I had the exact same error. I found out that by some bug in iTween it had dynamically added multiple iTween script components to one of my prefabs. As soon as I removed them, my errors disappeared.

I suggest you go through your prefabs

Answer 2

The order of script execution in Unity could be the problem. I had this problem days ago and the solution was to go to

Edit -> Project Settings -> Script Execution Order

then put the script that is been accessed from iTween.cs:6559 to run first. I was getting the same error randomly but they longer appear once I did it. Hopefully that will solve your problem.

Answer 3

I am not sure whether I had the same reason for the bug but this is how I solved it.

The objects I was running the itween on, were in the scene. When I made sure that the references I was using to invoke new instances were from a prefab and not references to objects in the scene - it worked.

Answer 4

在Awake函数中，iTween.Init（应用其间的每个对象），如PixelPlacement所述