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Author: Joe Stein | Website: http://www.jogrammah.com/

For Flash 8 and MX 2004. May not work in other versions.

This tutorial explains how to move a sprite on the screen with the arrow keys on the keyboard. It is aimed at beginners.

Step 1 Open a new Flash document.
Step 2 Make your sprite. It can be anything- a circle, a square, something more complex... whatever.
Step 3 Select all of your sprite and hit F8. Make sure it will be a movie clip, not a button or a graphic. It doesn't matter what it will be called.
Step 4 Click on your new movie clip and go into Actions (hit F9 if the Actions window is not already open.)
Step 5 Type in this code:

onClipEvent(enterFrame) { if(Key.isDown(Key.UP)) this._y-=3 if(Key.isDown(Key.DOWN)) this._y+=3 if(Key.isDown(Key.LEFT)) this._x-=3 if(Key.isDown(Key.RIGHT)) this._x+=3 }

line by line

onClipEvent(enterFrame) {
This tells Flash that the code inside the curly brackets { and } will need to be carried out at the beginning of every frame.

if(Key.isDown(Key.UP)) this._y-=3
This tells Flash that if the UP arrow key is pressed down, then it should change the y coordinate of the movie clip and reduce it by 3, hence moving the movie clip down 3 pixels.

This pattern of code is followed for these lines:
if(Key.isDown(Key.DOWN)) this._y+=3 if(Key.isDown(Key.LEFT)) this._x-=3 if(Key.isDown(Key.RIGHT)) this._x+=3

} This ends the function and tells Flash that everything that needs to be executed at the beginning of every frame is already out there.


» Level Basic

Added: 2008-04-15
Rating: 5.94 Votes: 18
» Author
I'm a relative beginner to Flash; however, I've made a relatively good game already and I'm planning to learn more about Flash and ActionScript! P.S. If you visit jogrammah.com, there is a customer support link on the bottom of the home page. Email me there, NOT at the email address provided!
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