(转载)【UGUI】侧面滑出的菜单栏，宽度自适应

首先看下项目效果

实现效果

发现实现效果并不难，利用动画（iTween）+UGUI 有一个长按的判断处理即可

附上项目和代码

using System.Collections;

using System.Collections.Generic;

using UnityEngine;

using UnityEngine.UI;

public class UICont : MonoBehaviour {

    public RectTransform mainUI;

    public Button showHideBtn;

    public RepeatButton dragBtn;

    private bool m_isShow = true;

   // public RectTransform

	// Use this for initialization

	void Start () {

        dragBtn.onPress.AddListener(DragBtn);

        showHideBtn.onClick.AddListener(ShowHide);

	}

    void ShowHide() {

        Vector3 vec3Tmp = mainUI.position;

        if(m_isShow) {

            vec3Tmp.x = -mainUI.sizeDelta.x;

            iTween.MoveTo(mainUI.gameObject, vec3Tmp, 1f);

            m_isShow = false;

        } else {

            vec3Tmp.x = 0;

            iTween.MoveTo(mainUI.gameObject, vec3Tmp, 1f);

            m_isShow = true;

        }

    }

    void DragBtn() {

        Vector2 vec2Tmp = mainUI.sizeDelta;

        vec2Tmp.x = Mathf.Clamp(Input.mousePosition.x, 100, 500);

        mainUI.sizeDelta = vec2Tmp;

    }

	// Update is called once per frame

    //void Update () {

    //}

}

/*******

 *

 * button长按的代理

 * http://blog.csdn.net/lyh916/article/details/51454673

 *

 *

 * */

using UnityEngine;

using System.Collections;

using UnityEngine.EventSystems;

using UnityEngine.Events;

public class RepeatButton : MonoBehaviour, IPointerDownHandler, IPointerUpHandler, IPointerExitHandler {

    public bool invokeOnce = false;//是否只调用一次

    private bool hadInvoke = false;//是否已经调用过

    public float interval = 0.1f;//按下后超过这个时间则认定为"长按"

    private bool isPointerDown = false;

    private float recordTime;

    public UnityEvent onDown = new UnityEvent();//按下时调用

    public UnityEvent onPress = new UnityEvent();//按住时调用

    public UnityEvent onRelease = new UnityEvent();//松开时调用

    void Start() {

    }

    void Update() {

        if (invokeOnce && hadInvoke)

            return;

        if (isPointerDown) {

            if ((Time.time - recordTime) > interval) {

                onPress.Invoke();

                hadInvoke = true;

            }

        }

    }

    public void OnPointerDown(PointerEventData eventData) {

        isPointerDown = true;

        recordTime = Time.time;

        onDown.Invoke();

    }

    public void OnPointerUp(PointerEventData eventData) {

        isPointerDown = false;

        hadInvoke = false;

        onRelease.Invoke();

    }

    public void OnPointerExit(PointerEventData eventData) {

        //isPointerDown = false;

        //hadInvoke = false;

        //onRelease.Invoke();

    }

}

最后附上demo：http://download.csdn.net/download/ldy597321444/10249594

效果地址：http://www.manew.com/thread-113570-1-1.html

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作者：Unity_阿黄
来源：CSDN
原文：https://blog.csdn.net/ldy597321444/article/details/79311014