How to load an image from URL with Unity?

Question

Please save me from going crazy.

No matter how many times I google, I always end up with (usually deprecated) versions of the following code:

IEnumer         


        

Answer 1

You can do that with async/await:

using System.Threading.Tasks;
using UnityEngine;
using UnityEngine.Networking;

public static async Task GetRemoteTexture ( string url )
{
    using( UnityWebRequest www = UnityWebRequestTexture.GetTexture( url ) )
    {
        //begin requenst:
        var asyncOp = www.SendWebRequest();

        //await until it's done: 
        while( asyncOp.isDone==false )
        {
            await Task.Delay( 1000/30 );//30 hertz
        }

        //read results:
        if( www.isNetworkError || www.isHttpError )
        {
            //log error:
            #if DEBUG
            Debug.Log( $"{ www.error }, URL:{ www.url }" );
            #endif

            //nothing to return on error:
            return null;
        }
        else
        {
            //return valid results:
            return DownloadHandlerTexture.GetContent( www );
        }
    }
}

Usage example:

[SerializeField] string _imageUrl;
[SerializeField] Material _material;
Texture2D _texture;

async void Start ()
{
    _texture = await GetRemoteTexture( _imageUrl );
    _material.mainTexture = _texture;
}

void OnDestroy () => Dispose();
public void Dispose () => Object.Destroy( _texture );// memory released, leak otherwise