Change UITexture runtime

[mimmog]

I must change the texture of <UITexture> with an image that I download from web. The code is :

1.                 userImg.GetComponent<UITexture>().material.mainTexture = SPFacebook.instance.userInfo.GetProfileImage(FacebookProfileImageSize.square);
2.                 GameObject.Find("UI Root").GetComponent<UIPanel>().Refresh();
3.  

It's right ? because the texture not change....

[NightPhoenix]

Try storing the image in a temp variable first and check if its null or not, like so:

1.  
2. Texture fbProfileImage = (Texture)SPFacebook.instance.userInfo.GetProfileImage(FacebookProfileImageSize.square);
3. userImg.GetComponent<UITexture>().material.mainTexture = fbProfileImage != null ? fbProfileImage : placeHolderProfileImage;

"placeHolderProfileImage" would be your fallback image to display in the case that fbProfileImage does return null, be it because of a connection error or whatever the case may be.

[Ferazel]

Don't put the new texture directly into the material's mainTexture as it will not trigger a rebuild of the draw call for the UITexture (which keeps a duplicate material on the backend). My recommendation would be to userImg.GetComponent<UITexture>().mainTexture = fbProfileImage;
Setting the UI Texture's mainTexture property should trigger the change properly.

[ArenMook]

Exactly what Ferazel said. You can't modify the material as NGUI creates a copy of it. You should be setting UITexture.mainTexture instead, or updating UITexture's drawCall.mainTexture.