framework not found after pod install

Symptom

1. Create a new Swift project on Xcode.
2. Close Xcode
3. Run pod init.
4. Edit the Podfile and add a framework.
5. Run pod install.
6. Restart Xcode from ***.xcodeproj
7. Run build and then “ld: framework not found framework-name” will come up.

Solution

Restart Xcode from ***.xcworkspace, not ***.xcodeproj.

If you restart Xcode from ***.xcodeproj, it does not recognize the newly installed framework.

If you restart Xcode from ***.xcworkspace, Xcode recognizes the newly installed framework as shown below.

Right after the pod install, you can find the ***.xcworkspace file is created at the same directory of ***.xcodeproj.