Right click-show in finder-AppIcon.appiconset-then replace the image
Then encounter a problem
That is, the image cannot have alpha
[Xcode] Application icon: ERROR ITMS-90717: “Invalid App Store Icon. The App Store Icon in the asset catalog in 'x …
Specific operations: Just make sure that the [AppIcon] picture set cannot have transparent pictures or pictures containing alpha.
[Assets.xcassets]->[AppIcon] Right-click the selected icon->[Show in Finder]->Double-click to open the image
->Menu in the upper left corner of the screen: [File]->[Export]->Uncheck [Alpha]->[Save]
->Replace the original image with the stored image->Check whether other images in the [AppIcon] image set have [Alpha] checked