csxfno21

Results 2 issues of csxfno21

Summary: ![image](https://user-images.githubusercontent.com/6103133/178915491-91ac642d-82bd-48ed-8933-fb0a7729974b.png) ![image](https://user-images.githubusercontent.com/6103133/178915520-29f9a260-f441-425b-a9e2-bad335c72daf.png) Steps to Reproduce: 1. when start app, it occurs in random circumstances Actual Result: Expected Result: Device, Build, OS:

Summary: When we build project, i found some errors.CBCharacteristic's service is optional type. In CharacteristicIdentifier file, there are two functions using CBCharacteristic.service but not appending ! or ??. The two...