Component

---

unity component

https://docs.unity3d.com/ScriptReference/Component.html (opens new window)

functions

functions	parameter	describe
gameObject:AddComponent(type)	1.typeof(UnityEngine.Animation) return:Component	Use typeof to get the type, if the addition is successful, it will return the component type
gameObject:GetComponent(type)	1.typeof(UnityEngine.Animation) return:Component
gameObject:GetComponent(string)	1.class name return: Component	example: Get the 'Animation' component, if the object exists "UnityEngine.Animation", it will return the Animation class
gameObject:GetComponents(type)	1.typeof(UnityEngine.Animation) return:Component[]

Correct Way to Check for Missing Components in XLua (Unity 6+)‌

‌Why does GetComponent return userdata instead of nil?

Use == nil ‌and‌ Equals(nil) to verify:

local ani1 = gameObject:GetComponent(typeof(UnityEngine.Animation))
if ani1 == nil or ani1:Equals(nil) then
    print("Component does not exist")
else
    print("Component exists:", Animation)
end

--or use IsExist \ IsNil to  check
if IsNil(ani1) then
    print("Component does not exist")
end

if IsExist(ani1) then
   print("Component exists:", Animation)
end

code

-- AddComponent
local ani1 = gameObject:AddComponent(typeof(UnityEngine.Animation))
   
-- GetComponent
local ani1 = gameObject:GetComponent(typeof(UnityEngine.Animation))

-- GetComponentsInChildren
local child_ani       = gameObject:GetComponentInChildren(typeof(UnityEngine.Animation))
local child_ani_array = gameObject:GetComponentsInChildren(typeof(UnityEngine.Animation)) 

-- GetComponentsInParent
local parent_ani       = gameObject:GetComponentInParent(typeof(UnityEngine.Animation))
local parent_ani_array = gameObject:GetComponentsInParent(typeof(UnityEngine.Animation))

local ani2 = gameObject:GetComponent('Animation')
--or-- ani = transform:GetComponent('Animation')

ani:Play("idle")

--获取数组
local mytf=TransformEx.MyPlayerTransform()
local items=mytf:GetComponents(typeof(UnityEngine.MonoBehaviour))
--or --items=mytf.gameObject:GetComponents(typeof(UnityEngine.MonoBehaviour))