JavaFX 2 Timeline setcyclecount()

Question

我在javase8和netbeans 8.0.2中使用javafx，我制作了随机生成的形状图像，并按照时间顺序显示它们。但最后一张照片没有显示。timeline.setcyclecount( 12 )我使用java生成12个图像，但没有在时间线中显示12.Image。

public class JavaFXApplication3 extends Application {
        int k;
        Timeline timeline;

        class ResizableCanvas extends Canvas {
            private void draw() {
                int[] uyaran = {3, 7, 12};
                boolean[] type = new boolean[12];
                for (int i = 0; i < 12; i++) {
                    type[i] = false;
                }
                for (int v : uyaran) {
                    type[v - 1] = true;
                }
                double w = getWidth();
                double h = getHeight();
                GraphicsContext gc = getGraphicsContext2D();
                gc.clearRect(0, 0, w, h);
                gc.setFill(Color.RED);
                System.out.println(k);
                if (type[k]) {
                    gc.fillOval(0, 0, w, h);
                }
                k++;
            }
        }

        @Override
        public void start(Stage stage) throws Exception {
            k = 0;
            ResizableCanvas canvas = new ResizableCanvas();
            timeline = new Timeline(new KeyFrame(Duration.millis(1000), ae -> canvas.draw()));
            timeline.setCycleCount(12);
            timeline.setOnFinished(ActionEvent -> {
                try {
                    Thread.sleep(10000);
                } catch (InterruptedException ex) {}
                stage.close();
            });
            timeline.play();
            Pane pane = new Pane();
            pane.getChildren().add(canvas);
            canvas.widthProperty().bind(pane.widthProperty());
            canvas.heightProperty().bind(pane.heightProperty());
            stage.setScene(new Scene(pane));
            stage.show();
        }

}

Answer 1

您正在上调用Thread.sleep(...)，它阻止线程并阻止其更新。最后一个椭圆实际上只有在暂停结束时才会呈现出来，但是当然你会关闭窗口，这样你就永远看不到它了。

使用PauseTransition暂停，并在暂停结束时使用其onFinished处理程序执行某些操作：

        timeline.setOnFinished(ae -> {
            PauseTransition pause = new PauseTransition(Duration.seconds(10));
            pause.setOnFinished(event -> stage.close());
            pause.play();
        });