我正在写一个类似于Arkanoid的简单游戏。需要按向左箭头进行平台移位。负责单击按钮的代码:
canvas.requestFocus();
canvas.setOnKeyTyped(new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent event) {
if (event.getCode() == KeyCode.LEFT) {
System.out.println("Leffft");
platform.LeftShift();
event.consume();
}
}
});
问题是,当您启动并按下按钮时,没有任何反应。
GameField.java
import javafx.animation.KeyFrame;
import javafx.animation.Timeline;
import javafx.application.Application;
import javafx.event.ActionEvent;
import javafx.event.EventHandler;
import javafx.scene.input.KeyCode;
import javafx.scene.input.KeyEvent;
import javafx.scene.layout.Pane;
import javafx.scene.paint.Color;
import javafx.stage.Stage;
import javafx.scene.Scene;
import javafx.util.Duration;
public class GameField extends Application {
public static GameField me;
public GameField()
{
me=this;
}
static Pane canvas = new Pane();
static Ball ball = new Ball(5, Color.WHITE);
static Platform platform = new Platform(80,5, Color.WHITE);
Scene scene = new Scene(canvas,550,500, Color.BLACK);
static Timeline timeline;
@Override
public void start(Stage stage) {
canvas.getChildren().add(ball);
canvas.getChildren().add(platform);
ball.relocate(50, 50);
platform.relocate(235,495);
stage.setScene(scene);
stage.setTitle("Cat Arcanoid");
stage.show();
timeline = new Timeline(new KeyFrame(Duration.millis(20),
new EventHandler<ActionEvent>() {
double dx = 10;
double dy = 10;
@Override
public void handle(ActionEvent t) {
ball.setLayoutX(ball.getLayoutX() + dx);
ball.setLayoutY(ball.getLayoutY() + dy);
dx = ball.XCollision(dx);
dy = ball.YCollision(dy);
dy = platform.PlatformCollision(dy);
canvas.requestFocus();
canvas.setOnKeyTyped(new EventHandler<KeyEvent>() {
@Override
public void handle(KeyEvent event) {
if (event.getCode() == KeyCode.LEFT) {
System.out.println("Leffft");
platform.LeftShift();
event.consume();
}
}
});
}
}));
timeline.setCycleCount(Timeline.INDEFINITE);
timeline.play();
}}
LeftShift方法
public void LeftShift(){
double dx = 10;
GameField.platform.relocate(getLayoutX()-dx, getLayoutY());
}
发布于 2018-09-28 03:58:33
关键事件提供了两个“级别”的事件。
更高级别(来自keyTyped)
“按键输入”事件是较高级别的事件,通常不依赖于平台或键盘布局。它们是在输入Unicode字符时生成的,是了解字符输入的首选方法。.对于不生成Unicode字符的键(例如,操作键、修改键等),不会生成任何键类型的事件。
较低级别的'keyPressed‘和'keyReleased’事件可能会满足您的需求:
“按下按键”和“释放按键”事件是较低级别的事件,取决于平台和键盘布局。它们是在按下或释放某个键时生成的,并且是查找不会生成字符输入的键(例如,操作键、修改键等)的唯一方法。按下或释放的键由code变量指示,该变量包含虚拟键代码。
https://stackoverflow.com/questions/52544131
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