My app icon do not show up on my device after I see the disconnected message from Xcode. I do see the app icon before that error.
How my problem occurs: Once I see the disconnected message, I unplug my cable, plug it again and build. Then, I see my app icon disappear. I tried to run my simulator. I do see the app icon. After that, I removed the whole AppIcon set in Assets.xcassets and add a new AppIcon set. Same thing still happens: AppIcon does show in my simulator but does not show in my device. I am wondering whether the disconnected issue crashes something in my device?
I always face a issue that my device vibrates constantly. To solve this issue, I unplug it and plug it again.
I fixed this issue by
delete the whole assets file and create a new one
put back all the images
resize my icon again