I am curious why they made UI System complex.
anyway, If you get any event from Event system(on UI), you can choice 2 options.

1. Using EventTrigger 
=> In my thinking, It's so terrible idea.It needs so many manual tasks. So I skip it. 

2. Using EventSystem
=> It's simple. However, I am finding another solution. Because it's not automation by runtime script.

a. add using...

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using UnityEngine.EventSystems;

b. inherit from interfaces

public class BehaviorButton : MonoBehaviour, IPointerEnterHandler {

}

c. add Method

using UnityEngine;
using UnityEngine.UI;
using System.Collections;
using UnityEngine.EventSystems;

public class BehaviorButton : MonoBehaviour, IPointerEnterHandler {
    public void OnPointerEnter(PointerEventData eventData) 
    {
 
    }
}

You can find it on unity's manual. (https://docs.unity3d.com/Manual/SupportedEvents.html)

IPointerEnterHandler - OnPointerEnter - Called when a pointer enters the object
IPointerExitHandler - OnPointerExit - Called when a pointer exits the object

IPointerDownHandler - OnPointerDown - Called when a pointer is pressed on the object
IPointerUpHandler - OnPointerUp - Called when a pointer is released (called on the original the pressed object)

IPointerClickHandler - OnPointerClick - Called when a pointer is pressed and released on the same object

IInitializePotentialDragHandler - OnInitializePotentialDrag - Called when a drag target is found, can be used to initialise values
IBeginDragHandler - OnBeginDrag - Called on the drag object when dragging is about to begin
IDragHandler - OnDrag - Called on the drag object when a drag is happening
IEndDragHandler - OnEndDrag - Called on the drag object when a drag finishes
IDropHandler - OnDrop - Called on the object where a drag finishes

IScrollHandler - OnScroll - Called when a mouse wheel scrolls

IUpdateSelectedHandler - OnUpdateSelected - Called on the selected object each tick

ISelectHandler - OnSelect - Called when the object becomes the selected object
IDeselectHandler - OnDeselect - Called on the selected object becomes deselected

IMoveHandler - OnMove - Called when a move event occurs (left, right, up, down, ect)

ISubmitHandler - OnSubmit - Called when the submit button is pressed
ICancelHandler - OnCancel - Called when the cancel button is pressed

* 영어 울렁증 가지고 계신분들께 죄송 -_-;; 
* 영어 연습겸 블로그에 영어로 작성중입니다.

* Prepare: Windows

1. Download Java JDK : http://www.oracle.com/technetwork/java ··· 151.html2. Install JDK
3. Open control panel
4. Open system path & Variable (Environment variable)
   a. search & run control panel.
   b. click System.
   c. click Advanced System setting.
5. create new system variable.
   a. JAVA_HOME: {Java JDK Path} (for example: D:\Program Files (x86)\Java\jdk1.8.0_25)
   b. CLASS_PATH: %JAVA_HOME%\lib
   c. PATH (just add new value): %JAVA_HOME%\bin
6. Download & Install Android Studio : https://developer.android.com/studio/index.html
7. Open Unity3d and Open Preferences
8. Click External Tool tab
9. Setup JDK / Android and NDK

Done

   

I wrote down install log of gitlab on the Mac.

1. Install docker : 
2. make "/srv" folder on root.
3. update permission it and add shared folder on docker's reference.


4. pull gitlab image from docker hub : docker pull gitlab/gitlab-ce
5. start gitlab

sudo docker run --detach \
--hostname vrainiac.ddns.net \
--publish 443:443 --publish 80:80 --publish 22:22 \
--name gitlab \
--restart always \
--volume /srv/gitlab/config:/etc/gitlab \
--volume /srv/gitlab/logs:/var/log/gitlab \
--volume /srv/gitlab/data:/var/opt/gitlab \
gitlab/gitlab-ce:latest

* perhaps you could saw this message on the log : ruby_block("directory resource: /var/opt/gitlab/git-data/repositories")

6. stop gitlab : docker stop gitlab
7. update permission
sudo chmod 0777 /srv/gitlab/data
sudo chmod 2770 /srv/gitlab/data/git-data/repositories
8. start gitlab : docker start gitlab

Fin!