NSInvalidArgumentException’, reason: ‘Cannot create an NSPersistentStoreCoordinator with a nil model’

问题描述:NSInvalidArgumentException', reason: 'Cannot create an NSPersistentStoreCoordinator with a nil model'
问题解决:原因是缺少.momd文件,即缺少.xcdatamodeld文件,在工程中加上就行