title: Protect Sqlite file in IOS, not using SQLCipher
body: <p>Beside using SQLCipher, is there any way to protect a sqlite file?</p>
  
  <p>I found that when I open my sqlite file, there is a button ("File"->"Encrypt") that lets me enter the encrypt key. But I don't know in my project in Xcode how I can set the decrypt key to open my database.</p>