iOS 11 / Xcode issue - Implicit declaration of function 'sqlite3_key' is invalid in C99

[sjlombardo]

@deepthi_nagaraja the error you’re seeing is likely due to version incompatibility if you are using an existing database. See this reference:

Upgrading to SQLCipher 4

The recent release of SQLCipher 4 introduces many new performance and security enhancements for applications that use SQLCipher for secure local data storage. However, the introduction of new default algorithms, increased KDF iterations and a larger page size means that SQLCipher 4 will not open older databases by default. This document provides guidance on the upgrade options available to applications that have previously integrated SQLCipher versions 1 through 3. Option 1: Database File Migr…