我也遇到了同样的问题，但无法用Shamsudheen TK提供的解决方案解决它。Ionic以某种方式为我的图标添加了透明度，即使源图标根本没有任何透明度。最后我用以下方法解决了这个问题:

安装imagemagick (MacOS):

酿造安装imagemagick

从资源文件夹中的所有图像中删除alpha通道:

查找。/resources/ name "*.png" -exec convert "{}" -alpha off "{}" \;

我尝试了这篇文章中提到的几种方法(除了转换成。jpg格式)，都没有成功。我通过在photoshop中打开文件并使用“导出到web”来解决这个问题。在该进程/窗口中有一个用于透明度的复选框。

我还shell脚本使用ffmpeg调整图像大小没有阿尔法通道。它适用于png格式。

# Export ios app icons by ffmpeg scale command
# usage: sh export_ios_icons.sh {path_to_your_img}
# example: sh export_ios_icons.sh ./app_icon.png

# sizes of images
# you can get other size images by editing thisarray
size=(20 40 60 29 58 87 80 120 180 76 152 167 1024)
for i in "${size[@]}"
do
   : 
    ffmpeg -i $1 -vf scale=$i:$i output_$ix$i.png
done

如果您在这里并且正在使用Flutter，请尝试此包https://pub.dev/packages/flutter_launcher_icons

然后添加

flutter_launcher_icons:
flutter_icons:
  android: true
  ios: true
  remove_alpha_ios: true
  image_path: "assets/images/logo.png"

去你的酒吧。yaml文件 它帮我解决了自己的问题

I also tried exporting without alpha it did not work for me but I figured it out that why I was getting error. I create an AppIcon using Figma & Sketch, but I tried to make a 2D geometry shape to 3D viewable. So I assume that I can achieve it by using some shadows & the same geometry but with lower alpha-like %70. After that, I got the AppIcon and export it without Alpha ticking but the problem was the main source of the image includes a container with lower alpha-like I did. So I change it to another graphical shape without alpha and it worked.

如果ionic3项目在上传到iTunes Connect时显示此错误，请检查此答案

这是我的项目错误，当我试图诋毁。

最后遵循这个答案，错误解决了。