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。

对于任何从颤振公司得到这个问题的人，像我一样

在你的pubspec.yaml:

flutter_icons:
  android: false. // I already had android icons
  ios: true
  remove_alpha_ios: true
  image_path: 'assets/images/icon.png' // Your image path

跑扑酒吧得到 运行flutter pub Run flutter_launcher_icons:main生成不带alpha的iOS图标。

在我挣扎了几天之后，这个为我解决了问题。是的，我确实尝试了这里建议的所有解决方案。其他方法都不管用。

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

我可以通过复制文件来解决Mac Sierra OS的问题，将新文件拖到桌面上，在预览中打开，然后单击导出选项(在文件菜单中)，然后出现不带“alpha”的保存选项

将图标从。png格式改为。jpg格式，一切都很顺利。