Wiki - Assign Delegate?

[jrgalim]

The wiki has an article on declaring delegates, but then how would I assign a function to the new delegate? Or an existing one?

[waneck]

You are right, I'll add it to the wiki once we merge ue4.16 to master. To answer your question, though, it depends on the type of delegate. Dynamic delegates need using unreal.CoreAPI; to be set, and then you can do either AddDynamic(obj.someUFunction) . or BindDynamic(obj.someUFunction) (depending if the delegate is multicast or not) On non-dynamic delegates, you have a few options:

• BindLambda(function() ..) / AddLambda(function() ...) to add a haxe function. This function will always be called unless you explicitly remove the delegate afterwards
• BindUFunction(obj.someUFunction) / AddUFunction : adds a ufunction that is associated with a UObject-derived class. This needs using unreal.CoreAPI as well

We also have BindUObject / AddUObject but that works just like the UFunction counterparts and rely on MethodPointer, which is only available for statically compiled (non-cppia) code, so this will probably be taken off for the release

[jrgalim]

Thank you for the thorough explanation! Very informative. Does the function that's being referenced require @uexpose or anything? I tested it on a collision component, and I'm not getting any compile errors, but my function is also not being called:

CollisionComp.OnComponentHit.AddDynamic(this.OnHit); ... public function OnHit(HitComp:UPrimitiveComponent, OtherActor:AActor, OtherComp:UPrimitiveComponent, NormalImpulse:FVector, FHitResultHit:FHitResult) { trace("projectile hit something"); }

[waneck]

Like in Unreal, only ufunctions can be added to dynamic delegates. I'll make sure to add a check about this as well

[jrgalim]

Ah, yeah, that was the key, everything is working now. Thank you!

[waneck]

Wiki was updated