Xcode Crash due to Persistance container in swift

问题

I'm currently making an app implementing core data. However, when I build, it crashes at this line:

Thread 1: Fatal error: Unresolved error Error Domain=NSCocoaErrorDomain Code=134140 "Persistent store migration failed, missing mapping model." UserInfo={sourceModel=() isEditable 0, entities {

What does this mean? How can I solve this?

ios swift

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来源：https://stackoverflow.com/questions/57155241/xcode-crash-due-to-persistance-container-in-swift