调整一下图片的缩放

Assets/scripts/ScaleToImage.cs

+using DG.Tweening;
 using System.Collections;
 using System.Collections.Generic;
 using System.Diagnostics;
@@ -13,11 +14,17 @@ public class ScaleToImage : MonoBehaviour
     public float scaleSpeed = 1;
 
     public bool isLimitScale;
-    public float min, max;
 
     public Camera canvasCamera;
 
-    public Transform ScrollRect; //组的列表
+    public Transform ScrollRect; //组的父节点
+
+    public float MinScale;
+    public float MaxScale;
+
+    public float Min_Move;
+    public float Max_Move;
+
 
     private bool isInit_one;
     private Vector3 offset;
@@ -26,12 +33,35 @@ public class ScaleToImage : MonoBehaviour
     private float ToFigerdistance; //距离
 
     private float MoveValue; //移动，缩放大了就小一些
+
+    private bool PlayAniFlag;
+    private Vector3 OldPos;
     private void Update()
     {
         //不是双指就关闭
         if (Input.touchCount != 2)
         {
             isInit = false;
+
+            if (PlayAniFlag)
+            {
+                if (target.GetChild(0).localScale.x <= Min_Move) //缩放小的回大
+                {
+                    for (int i = 0; i < target.childCount; i++)
+                    {
+                        target.GetChild(i).DOScale(Vector3.one * MinScale, 0.3f);
+                    }
+                }
+                else if (target.GetChild(0).localScale.x >= Max_Move)   //大的回来小
+                {
+                    for (int i = 0; i < target.childCount; i++)
+                    {
+                        target.GetChild(i).DOScale(Vector3.one * MaxScale, 0.3f);
+                        target.GetChild(i).DOMove(oriPos, 0.3f);
+                    }
+                }
+                PlayAniFlag = false;
+            }
         }
         //初始化
         if (Input.touchCount == 2 && !isInit)
@@ -65,6 +95,7 @@ public class ScaleToImage : MonoBehaviour
         }
         if (Input.touchCount == 2)
         {
+            isInit_one = false;
             if (!IsImageArea(Input.GetTouch(0).position) || !IsImageArea(Input.GetTouch(1).position))
             {
                 isInit = false;
@@ -72,28 +103,44 @@ public class ScaleToImage : MonoBehaviour
             }
 
             //两指缩放比例
-            scale = Vector3.Distance(canvasCamera.ScreenToWorldPoint(Input.GetTouch(0).position), canvasCamera.ScreenToWorldPoint(Input.GetTouch(1).position)) / Vector3.Distance(touch1, touch2);  //大于1是放大，小于是缩小
+            float nowdis = Vector3.Distance(canvasCamera.ScreenToWorldPoint(Input.GetTouch(0).position), canvasCamera.ScreenToWorldPoint(Input.GetTouch(1).position));
+            scale =  nowdis / Vector3.Distance(touch1, touch2);  //大于1是放大，小于是缩小
 
             //利用scaleSpeed控制缩放速度
-            scale = scale - 1;   //正的话就是放大图片
+            scale = (scale - 1) * 0.8f;   //正的话就是放大图片
             if (scale < 0)
             {
-                scale = scale * oriScale;
+                scale = scale * oriScale * 0.8f;
             }
 
+            if (target.GetChild(0).localScale.x < Min_Move)
+            {
+                PlayAniFlag = true;
+                return;
+            }
+
+            float scale_target;
             for (int i = 0; i < target.childCount; i++)
             {
                 var item = target.GetChild(i);
-                //缩放目标大小
-                item.localScale = Vector3.one * (oriScale + scale);
+                scale_target = (Vector3.one * (oriScale + scale)).x;
+                if (scale_target < Min_Move)
+                {
+                    item.localScale = Vector3.one * Min_Move * 0.99f;
+                }
+                else if (scale_target > Max_Move)
+                {
+                    item.localScale = Vector3.one * (oriScale + scale);
+                    PlayAniFlag = true;
+                }
+                else
+                    item.localScale = Vector3.one * (oriScale + scale);
 
-                //改变目标位置，让位置保持不变
 
+                //改变目标位置，让位置保持不变
                 item.position = oriPos - ToFigerCenter * (item.localScale.x - oriScale) * ToFigerdistance * MoveValue;
-
             }
-
-            isInit_one = false;
+            
         }
 
         if (Input.touchCount == 1) //单指拖动

ProjectSettings/TagManager.asset

@@ -41,3 +41,6 @@ TagManager:
   - name: Default
     uniqueID: 0
     locked: 0
+  - name: UI
+    uniqueID: 4064369897
+    locked: 0