Touch ID integration on iOS app

I am developing a new iOS app, on that if the user is idle for some time the app become locked and need to authenticate using Touch ID or password. This is the first time I am working with touch ID. Now I am facing some issues, they are :

1. Can I use the Touch ID of my iPhone and the password of my app to unlock the app ? (That is when the app become locked the authentication alert will show, user can authenticate using Touch ID, or if the user taps on the "Enter password" option I need to navigate to another page of my app where the user authentication done by using the app password)
2. Is it possible to remove the "cancel" button from the touch ID alertview ?
3. On the first time the "Enter password" option on the touch ID alert is not showing. When I entered a wrong touch ID then from the next time onwards the Enter password option is displayed. (I didn't set any value for "localizedFallbackTitle")

Thanks in advance.