摘要： BUG是这样的:有默认数据的表有时添加数据不成功,错误提示如下CoreData: error: (19) constraint failedCore Data: annotation: -executeRequest: encountered exception = error during SQL execution : constraint failed with userInfo = { NSFilePath = "filePath.sqlite"; NSSQLiteErrorDomain = 19;}开发过程中更改过数据结构，最终的默认数据库是用CSV导入并且只导入 阅读全文