Cocoa中的keyUp / keyDown问题(keyUp/keyDown problems in Cocoa)

Cocoa中的keyUp / keyDown问题(keyUp/keyDown problems in Cocoa)

我正在编写一个将成为基本视频游戏的应用程序，但keyUp：（NSEvent ）和keyDown：（NSEvent ）方法无法执行。

这是我的代码：

-(void)keyUp:(NSEvent*)event { NSLog(@"Key %@", event); } -(void)keyDown:(NSEvent*)event { switch( [event keyCode] ) { case 126: case 125: case 124: case 123: NSLog(@"Arrow key pressed!"); break; default: NSLog(@"Key %@", event); break; } }

我确定它在NSResponder的子类中（虽然它在NSOpenGLView中，可能会影响它吗？）然后我没有看到任何问题。 任何帮助都非常有用。 谢谢 ：）

I'm programming an app that will be a basic video game, but the keyUp:(NSEvent ) and keyDown:(NSEvent) methods are failing to execute.

This is my code:

-(void)keyUp:(NSEvent*)event { NSLog(@"Key %@", event); } -(void)keyDown:(NSEvent*)event { switch( [event keyCode] ) { case 126: case 125: case 124: case 123: NSLog(@"Arrow key pressed!"); break; default: NSLog(@"Key %@", event); break; } }

I made sure it was in a subclass of NSResponder (although it is in NSOpenGLView, could that be affecting it?) and other then that I don't see any problem. Any help is greatly appriciated. Thanks :)

最满意答案

您是否实现了NSResponder方法acceptFirstResponder以返回YES？

- (BOOL)acceptsFirstResponder { return YES; }

Did you implement the NSResponder method acceptsFirstResponder to return YES?

- (BOOL)acceptsFirstResponder { return YES; }