iOS crashes game but android works like charm

I have created a game in Unity and published it on Android,it works on all types of phones,tested Note9 and P20 as well as Samsung Tab 2 from 2011 and some LG from 2010. It all works without a single lag or crash.
When i deploy game on iOS the core features works well,actually everything works well except when you want to take screenshot of a game,then it crashes all
This is the code used for Screenshot

Code (CSharp):

1.        takeHiResShot = false;
2.         Debug.Log("Started Taking ScreenShot");
3.         Flash.SetActive(true);
4.          RenderTexture rt = new RenderTexture(resWidth, resHeight, 24);
5.          cam.targetTexture = rt;
6.         Texture2D screenShot = new Texture2D(resWidth, resHeight, TextureFormat.RGB24, false);
7.         cam.Render();
8.         RenderTexture.active = rt;
9.         screenShot.ReadPixels(new Rect(0, 0, resWidth, resHeight), 0, 0);
10.         cam.targetTexture = null;
11.         RenderTexture.active = null;
12.         //Destroy(rt);
13.         byte[] bytes = screenShot.EncodeToPNG();
14.         filename = ScreenShotName(resWidth, resHeight);
15.  
16.         FullSharePath = "/storage/emulated/0/GarderobaShots/" + filename + ".png";
17.  
18.         Texture2D textu = new Texture2D(900,1320, TextureFormat.RGBAFloat, false);
19.         textu.LoadImage(bytes);
20.         textu.Apply();
21.         spr = Sprite.Create(textu ,new Rect(0.0f, 0.0f, textu.width, textu.height), new Vector2(1f, 1f), 100.0f);
22.  
23.         ShareAbleObject.transform.GetChild(1).gameObject.GetComponent<Image>().sprite = spr;
24.         ShareAbleObject.SetActive(true);
25.         NativeGallery.SaveImageToGallery(textu, "AmazingGirlsShots", filename + ".png");
26.        
27.         takeHiResShot = false;
28.         Debug.Log("Ended ScreenShot");

Can you please help me out,what is wrong here?

 

Did you check the crash logs on the iOS device?

 

yes i did,and it doesnt show any errors,debug logs go on,and silently crashes...

 

Wait, the iOS device crash logs doesn't show a reason it crashed? I'm not talking unity stuff, the device itself under the iOS analytics has no logs for crashes?

If this is the case, probably not going to be able to help you. But it looks like you are using the NativeGallery plugin, so perhaps just make sure you didn't miss a step to make sure it worked right on iOS.