Successfully downcast the NSManagedObject to MobilePhone while fetchRequest retrieves data from store. This is achieved by mapping the MobilePhone entity to QiuTuiJianTests.MobilePhone class in the XCode Model Editor. THIS MUST BE REVERTED TO QiuTuiJian.MobilePhone
Added DataDao model class. However, the model-class mapping still requires QuiTuiJianTests module prefix, which is not produciton ready.
enabled the light-weight persistence store migration
Added DataDao class. However, testing crashes
Added QiuTuiJian.xcodeproj project settings into git
Initial DataDao.swift and test case works.
project settings disappeared and added it back