Capturing Arrow Key Press

Post: #1
Does anyone know what the structure is for the NSEvent class? I want to capture arrow input for my application. I know that this calls the keyDown and keyUp methods but I don't know anything about the NSEvent class that is passed into these functions. Any help is appriciated.

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Posts: 40
Joined: 2004.12
Post: #2
Try this from apple's site.

Look in the constants section under keys.

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Posts: 196
Joined: 2003.10
Post: #3
There's a lot of info on that already posted. Try searching.


- Use an array of keys to store their states (up, down)
- Operate based on those states. For instance, if you have a ship that's shooting, only shoot if the space bar state is down, and so on.
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Post: #4
try [event charactersIgnoringModifiers] which returns an NSString.

event is an NSEvent that you get from the keyDown method

"When you dream, there are no rules..."
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Posts: 114
Joined: 2005.03
Post: #5
Use the keyCode method, which returns an integer. There's an old, but still correct table somewhere on that shows what keys map to what key codes. Unfortunately, it's extremely hard to find, so if you can't find it, use an NSLog to show the codes you get when pressing the keys and then use them.

Edit: I found it here. I know it's old, but it worked for me.
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Joined: 2002.04
Post: #6
int keyCharacter = [[theEvent charactersIgnoringModifiers] characterAtIndex:0];
if (keyCharacter == NSUpArrowFunctionKey) .... ;
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