Capture Key Presses In Many GKState Classes - objective-c

Question

I'm using SpriteKit in Objective C for Mac OS. I'm a noob when it comes to working with NSNotification, but I used the following method in another app I was working on, but it's now not working. Perhaps there's a better method, but I want to be able to capture key presses based on what state the app is in.
The Main Issue
The state begins in GameBeginState. Once the spacebar is pressed, it moves into GamePlayState. If I press any other keys, it shows that it's using the keyPressed: method from GameBeginState as opposed to the keyPressed method in GamePlayState. Any ideas why? I can't figure this out for the life of me.
Details
I created a custom view called CustomNotificationHandler and set my main SKView in the project.
Here's the code for CustomNotificationHandler:
CustomNotificationHandler
#import "CustomNotificationHandler.h"
#implementation CustomNotificationHandler:SKView {
// Add instance variables here
}
- (id) initWithCoder:(NSCoder *)coder {
self = [super initWithCoder:coder];
if (self) {
// Allocate and initialize your instance variables here
}
return self;
}
- (void) keyDown:(NSEvent *)theEvent {
[[NSNotificationCenter defaultCenter] postNotificationName:#"KeyPressedNotificationKey"
object:nil
userInfo:#{#"keyCode" : #(theEvent.keyCode)}];
}
#end
In my main class GameScene I have a GKStateMachine set up that initializes 3 states. The classes for the states are below:
GamePlayState.m
#import "GameReadyState.h"
#import "GamePlayState.h"
#interface GameReadyState()
#property (weak) GameScene *scene;
#end
#implementation GameReadyState
-(instancetype) initWithScene:(GameScene*)scene {
if (self = [super init]) {
self.scene = scene;
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyPressed:) name:#"KeyPressedNotificationKey" object:nil];
}
return self;
}
-(void) didEnterWithPreviousState:(GKState *)previousState {
}
-(void) willExitWithNextState:(GKState *)nextState {
}
-(BOOL) isValidNextState:(Class)stateClass {
return stateClass == [GamePlayState class];
}
-(void)keyPressed:(NSNotification*)notification {
NSNumber *keyCodeObject = notification.userInfo[#"keyCode"];
NSInteger keyCode = keyCodeObject.integerValue;
NSLog(#"GAME READY key = %ld", (long)keyCode);
switch (keyCode) {
case 49:
[self.stateMachine enterState:[GamePlayState class]];
break;
default:
break;
}
}
#end
Here's the 2nd state...pretty much the same as the 1st:
GamePlayState
#import "GamePlayState.h"
#import "GamePauseState.h"
#interface GamePlayState()
#property (weak) GameScene *scene;
#end
#implementation GamePlayState
-(instancetype) initWithScene:(GameScene*)scene {
if (self = [super init]) {
self.scene = scene;
[[NSNotificationCenter defaultCenter] addObserver:self selector:#selector(keyPressed:) name:#"KeyPressedNotificationKey" object:nil];
}
return self;
}
-(void) didEnterWithPreviousState:(GKState *)previousState {
[_scene setPaused:NO];
}
-(BOOL) isValidNextState:(Class)stateClass {
return stateClass == [GamePauseState class];
}
-(void) updateWithDeltaTime:(NSTimeInterval)seconds {
[_scene.sequence moveLeft];
}
-(void)keyPressed:(NSNotification*)notification {
NSNumber *keyCodeObject = notification.userInfo[#"keyCode"];
NSInteger keyCode = keyCodeObject.integerValue;
NSLog(#"GAME PLAY key = %ld", (long)keyCode);
switch (keyCode) {
case 53:
[self.stateMachine enterState:[GamePauseState class]];
[_scene setPaused:YES];
break;
default:
break;
}
}
#end