koobas.hobune.stream
Duplicate Question
NullReference with trigger C# ?
Hi,
I don't understand why I get this error in my code :
CornerIA1.OnTriggerEnter After the collision, triggerOn = true should be sent to the IAParent script, the scripts are well connected to their gameObject, I also tried with GetComponent<> or transform.GetComponent... but still the same thing. Here is the code : //IAParent scr; void Start () { }NullReferenceException: Object reference not set to an instance of an object
void Update () { }
void OnTriggerEnter ( Collider other ) { IAParent scr = other.GetComponent("IAParent") as IAParent; scr.triggerOn = true;//null reference } Would you know why? Thanks
"other" isn't a GameObject, and it migth be to do what you want. try other.gameObject.GetComponent("IAParent") as IAParent;. about the GetComponent method I prefer doing GetComponent() , works better
@Ninita thanks, unfortunately no. It still shows the error on scr.triggerOn... if I remove it, I don't get the error anymore.
do
IAParent scr = other.gameObject.GetComponent<IAParent>();
if(!scr)
{
Debug.Log("scr don't exist");
scr = other.gameObject.AddComponent("IAParent");
}
scr.triggerOn=true;
that error says that gameObject with that collider don't have any component IAParent, and with this code you guarantee it have
not tested
what happens if you use something like this?
//IAParent scr;
void Start () { }
void Update () { }
void OnTriggerEnter ( Collider other ) {
IAParent scr = other.gameObject.GetComponent("IAParent") as IAParent;
scr.triggerOn = true;//null reference
}
Thanks @$$anonymous$$arsten, nop, I tried this first. I still get the same error on scr.triggerOn = true ... @Fattie sorry maybe there is a mistake with the closure of this topic, could you re-open it? it works fine for "scr = ..." but it does not work with "src.triggerOn..." . triggerOn is "public" in my other class. Thanks
hm very strange, can you proof that scr has a value after IAParent scr = other.gameObject.GetComponent("IAParent") as IAParent; ? also i think you can left out "as IAParent" because its implicit said in the declaration IAParent scr =
maybe triggerOn is a local variable in IAParent?
Thanks @$$anonymous$$arsten for your help, I could make it work with Ninita's code, thanks anyway. Really appreciated!
