objective-c - SpriteKit MouseMoved 不工作

Question

我知道之前有人问过这个问题，但我认为答案可能需要更新，因为它目前在使用 Xcode 8.3.3 for Mac OS 的 SpriteKit 中不起作用。看完这篇post ，我意识到以前可以在 AppDelegate 中完成的工作现在应该在 ViewController 中完成，但它不起作用。有人对为什么这不起作用有任何建议吗？这是我的各种类(class)的样子:

ViewController.m

#import "ViewController.h"
#import "GameScene.h"

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // Load the SKScene from 'GameScene.sks'
    GameScene *scene = (GameScene *)[SKScene nodeWithFileNamed:@"GameScene"];

    // Set the scale mode to scale to fit the window
    scene.scaleMode = SKSceneScaleModeAspectFill;

    // Present the scene
    [self.skView presentScene:scene];

    self.skView.showsFPS = YES;
    self.skView.showsNodeCount = YES;

    //added in hopes that mouse moved events would be captured
    [self.skView.window setAcceptsMouseMovedEvents:YES];
    [self.skView.window setInitialFirstResponder:self.skView];
}

@end

GameScene.m

#import "GameScene.h"

@implementation GameScene

- (void)didMoveToView:(SKView *)view {

}

-(void) mouseMoved:(NSEvent *)event {
    NSLog(@"blah");
}

-(void)update:(CFTimeInterval)currentTime {
    // Called before each frame is rendered
}

@end

Answer 1

您正在将第一响应者设置为 skView，您需要将其设置为 skView.scene 以便鼠标响应您的场景实例，而不是您的 View 实例。

第 1 步:将窗口代码移动到 viewDidAppear

第 2 步:使用 [self.skView.window makeFirstResponder:self.skView.scene];

将您的第一响应者更改为场景

之所以需要在 viewDidAppear 事件中执行此操作，是因为 SKView 的 window 是 nil在 viewDidLoad 事件期间。如果您在 Swift 中完成此操作，self.skView.window!.setsAcceptedMouseMovements = true 将失败(Swift 是一种高级语言，我建议使用它)

#import "ViewController.h"
#import "GameScene.h"

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // Load the SKScene from 'GameScene.sks'
    GameScene *scene = (GameScene *)[SKScene nodeWithFileNamed:@"GameScene"];

    // Set the scale mode to scale to fit the window
    scene.scaleMode = SKSceneScaleModeAspectFill;

    // Present the scene
    [self.skView presentScene:scene];

    self.skView.showsFPS = YES;
    self.skView.showsNodeCount = YES;


}
- (void) viewDidAppear {
    //added in hopes that mouse moved events would be captured
    [self.skView.window setAcceptsMouseMovedEvents:YES];
    [self.skView.window setInitialFirstResponder:self.skView];
    [self.skView.window makeFirstResponder:self.skView.scene];
}
@end