A Simple Login System

In this lesson we will teach you how to create a simple login system that can be used on your stack. Although this is a simple method of implemeting such a feature, it can be built upon to create more advanced systems.

Create a new stack

1) Create a new stack
2) Name the stack "Login Test"
3) Name this first card "Login"

Create a new card

1) Create a new card and call it "accessed"

Setup accessed card

1) Add label field with "Access Granted"
2) Add button with following script

on mouseUp
go to the first card
end mouseUp

Create Login card elements

1) Navigate to log in card
2) Create two input fields. One called username and one called password
3) Create two label fields. One with its contents set to "Username" and the other "Password"
4) Create a button and set its label to "Login"

Edit the script of the card

Place the following in your card script

local sUsername, sPassword

on openCard
put "johnsmith" into sUsername
put "pa55word" into sPassword
end openCard

on loginCheck
if field "username" is sUsername and field "password" is sPassword then
answer "Login Successful"
go to card "accessed"
else
answer "Details Incorrect. Please try again!"
end if
end loginCheck

Edit the script of the "Login Button"

Call the "loginCheck" handler from the mouseUp of this button

Test the Script

The above script puts a defined username and password into a variable and then the loginCheck handler checks if the contents of the username and password fields matches these values.

If a match is successful then you progress to the next card. However, if details are in-correct then an answer dialog is shown.