Incorrect image alpha rendering on Xcode 15b3 and iOS 17

Facing same issue with Xcode Version 15.0 beta 4 (15A5195m)

I also have the same problem Xcode Version 15.0 beta 4 (15A5195m)

[@Sathana S.](https://developer.apple.com/forums/profile/Sathana S.) @zhaozhiqiang I'm still having issues with beta 4 as well. Do you recall when it started happening to you? Did you use the Profiler by any chance? I'm trying to pinpoint what could have gone wrong.

@nadastudio I only recently used Xcode 15.0 beta 4，Previously used xcode 14

Seems to be working fine again in Xcode 15.0 beta 5 (15A5209g)

issue still here in Xcode 15.0 release

Any luck with this problem ? Faced this in Xcode 15.0 (15A240d) release version.

Found the solution. Need to change compression type to "Basic"

After upgrading XCode15, I also encountered this issue. May I ask how this issue was ultimately resolved

After upgrading to xcode15, I also encountered this issue where images with transparent channels will have gray fill when running. I would like to ask how this problem was ultimately resolved.

We still have same issue on Xcode 15.1 beta.

I find PNG with alpha in Assets.car is compressed with 'Gray' color space.

I think 'Gray' color space is no problem.

But there is a huge difference of compression results between Xcode 14 and Xcode 15.

The issue is still occurring in xcode version 15.0.1 (15A507). Is there a correct solution?

You can check the bits/channel of the png, if the png is 4 bits/channel, you can export to 8 bits/channel.

this issue is still occurring in xcode version 15.2 (15C500b).

Is there anyone tried to send a feedback to Apple?

I found an ugly solution to this problem, just drag image from Assets.xcassets to project。

just use UIImage(named: "btn_trend_release") works well。

but app size may increase

as LimingWan said trans png to 8 bit is fine。 simple use python fix

install PIL

pip install pillow

from PIL import Image

def deal_png_at_location(root):
    for root, dirs, files in os.walk(root):
        for file in files:
            if file.endswith(".png"):
                img_path = os.path.join(root, file)
                img = Image.open(img_path)
                # whether this file is an 8-bit png, skip it if not
                if img.mode != "P":
                    continue
                img = img.convert("RGBA")
                img.save(img_path)

deal_png_at_location("./Assets.xcassets")

I made a Proj to summarize the solution:

• Packaged with Xcode 14.3.

  • Unrealistic. Apple required Xcode 15 now, News.

• Move all image from assets to bundle.

  • Unrealistic.

• Change: Assets - Image Set - Compression - Lossy, Basic.

  • Works. But the problem is that there are so many pictures that you don't know which ones are actually render wrong.

• Change: Assets - Assets Catalog - Compression - Lossy, Basic.

  • Unavailable. Other image will render incorrectly.

• Check image bit, if image is 4 bit or another, convert to 8 bit.

  • Works. But the problem is some 8 bit image also have wrong render.

• Convert all images to 8 bit use PIL.

  • I choose this as the final solution.

• Question:

  • Can we write a script to scan images that may be rendering incorrectly?