Wayback Machinekoobas.hobune.stream
May JUN Jul
Previous capture 12 Next capture
2021 2022 2023
1 capture
12 Jun 22 - 12 Jun 22
sparklines
Close Help
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
  • Asset Store
  • Get Unity

UNITY ACCOUNT

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account
  • Blog
  • Forums
  • Answers
  • Evangelists
  • User Groups
  • Beta Program
  • Advisory Panel

Navigation

  • Home
  • Products
  • Solutions
  • Made with Unity
  • Learning
  • Support & Services
  • Community
    • Blog
    • Forums
    • Answers
    • Evangelists
    • User Groups
    • Beta Program
    • Advisory Panel

Unity account

You need a Unity Account to shop in the Online and Asset Stores, participate in the Unity Community and manage your license portfolio. Login Create account

Language

  • Chinese
  • Spanish
  • Japanese
  • Korean
  • Portuguese
  • Ask a question
  • Spaces
    • Default
    • Help Room
    • META
    • Moderators
    • Topics
    • Questions
    • Users
    • Badges
  • Home /
avatar image
0
Question by hhsmobileapps · Feb 09, 2020 at 09:06 PM · canvasuser interfacescrollviewzoom

How to scroll/drag multiple ui images simultaneously?

I've two similar UI images inside canvas one under the other, they are independent gameobjects. Since the images are big size each has a parent with Scrollrect + Mask and has a child UI image with pinch zoom script attached. I want both of them to have a zoom capability but within their own boundaries. Since i attached the script to both of them, zoom capability is working fine, when i pinch on mobile device both zoom simultaneously. But after zoom stopped, i also want to drag/scroll both of these images simultaneously. Scrollrect is working fine for this but only the touched image is scrolling, the other is not scrolling, which i don't want. How can i scroll both of them simultaneously in the same way (something like if one is scrolling, scroll the other one in the same way)

Here is my script for pinch zoom:

 public class PinchZoom : MonoBehaviour
 {
     [SerializeField] float zoomSpeed = 0.1f;
     [SerializeField] float maxZoom = 5f;
     [SerializeField] ScrollRect scrollRect;

     private Vector3 initialScale;

     private void Awake()
     {
         initialScale = transform.localScale;
     }

     void Update()
     {
         // If there are two touches on the device...
         if (Input.touchCount == 2)
         {
             // Disable scrolling while pinch
             scrollRect.enabled = false;

             // Store both touches.
             Touch firstTouch = Input.GetTouch(0);
             Touch secondTouch = Input.GetTouch(1);

             // Find the position of each touch in the previous frame.
             Vector2 firstTouchPrevPos = firstTouch.position - firstTouch.deltaPosition;
             Vector2 secondTouchPrevPos = secondTouch.position - secondTouch.deltaPosition;

             // Find the magnitude of the vector (the distance) between the touches in each frame.
             float prevTouchDeltaMag = (firstTouchPrevPos - secondTouchPrevPos).magnitude;
             float currTouchDeltaMag = (firstTouch.position - secondTouch.position).magnitude;

             // Find the difference in the distances between each frame.
             float deltaMagnitudeDiff =  currTouchDeltaMag - prevTouchDeltaMag;

             // create a vector from the change amount
             var delta = Vector3.one * (deltaMagnitudeDiff * zoomSpeed * Time.deltaTime);
    
             // rescale the image, but clamp the scale
             var desiredScale = transform.localScale + delta;
             desiredScale = ClampDesiredScale(desiredScale);
             transform.localScale = desiredScale;
         }
         else
             // Enable scrolling
             scrollRect.enabled = true;
     }

     private Vector3 ClampDesiredScale(Vector3 desiredScale)
     {
         desiredScale = Vector3.Max(initialScale, desiredScale);
         desiredScale = Vector3.Min(initialScale * maxZoom, desiredScale);
         return desiredScale;
     }
 }

Comment
Add comment
10 |3000 characters needed characters left characters exceeded
▼
  • Viewable by all users
  • Viewable by moderators
  • Viewable by moderators and the original poster
  • Advanced visibility
Viewable by all users

0 Replies

· Add your reply
  • Sort: 

Your answer

Hint: You can notify a user about this post by typing @username

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

Follow this Question

Answers Answers and Comments

129 People are following this question.

avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image avatar image

Related Questions

Re-center UI Image after zooming out 0 Answers

Use UI buttons with Time.timeScale=0? 3 Answers

Why use different Canvas Render Modes 0 Answers

Can't get UI Canvas to overlay the scene 2 Answers

How to scale according to different mobile resolutions? 0 Answers


Enterprise
Social Q&A

Social
Subscribe on YouTube social-youtube Follow on LinkedIn social-linkedin Follow on Twitter social-twitter Follow on Facebook social-facebook Follow on Instagram social-instagram

Footer

  • Purchase
    • Products
    • Subscription
    • Asset Store
    • Unity Gear
    • Resellers
  • Education
    • Students
    • Educators
    • Certification
    • Learn
    • Center of Excellence
  • Download
    • Unity
    • Beta Program
  • Unity Labs
    • Labs
    • Publications
  • Resources
    • Learn platform
    • Community
    • Documentation
    • Unity QA
    • FAQ
    • Services Status
    • Connect
  • About Unity
    • About Us
    • Blog
    • Events
    • Careers
    • Contact
    • Press
    • Partners
    • Affiliates
    • Security
Copyright © 2020 Unity Technologies
  • Legal
  • Privacy Policy
  • Cookies
  • Do Not Sell My Personal Information
  • Cookies Settings
"Unity", Unity logos, and other Unity trademarks are trademarks or registered trademarks of Unity Technologies or its affiliates in the U.S. and elsewhere (more info here). Other names or brands are trademarks of their respective owners.
  • Anonymous
  • Sign in
  • Create
  • Ask a question
  • Spaces
  • Default
  • Help Room
  • META
  • Moderators
  • Explore
  • Topics
  • Questions
  • Users
  • Badges