Xcode error: Embedded binary ' s bundle identifier is not prefixed with the parent app ' bundle identifier

This error usually occurs because the bundle identifier is not set correctly.

1. If the project is directly downloaded from the Internet, first check the project targets under the bundle identifier has been set. If the SDK is a demo project, Bundle identifier is usually blank and needs to be filled in manually. Then select the developer account in the signing team below. At the same time, in the targets under the corresponding test project must do the same setting.

2.xcode + iwatch Debug Error
The following three items (project name my) are under the Targets of the project: My, my WatchKit app, my WatchKit extention
General-> Identity under the Bundle identifier are fixed written, do not casually change.
For example:
com.xxx.my
Com.xxx.my.watchkitapp
Com.xxx.my.watchkitapp.watchkitextension