Question

我是Java SWT的新手。我创建了游戏“2048”（通过MVP模型），我尝试更新Gui中的Score标签 - 我不知道为什么但是得分没有更新。我不确定如何使用所有Listners以及哪一个对这个动作有好处，你能帮助我吗？

public void buttons() {
    Group group = new Group(this.shell, SWT.SHADOW_OUT);
    final Label label2 = new Label(group, SWT.BORDER);
    Button UndoMove = new Button(group, SWT.PUSH);
    Button RestartGame = new Button(group, SWT.PUSH);
    Button LoadGame = new Button(group, SWT.PUSH);
    Button SaveGame = new Button(group, SWT.PUSH);

    group.setLayout(new GridLayout(1, false));

    **int i = board.getScore();
    label2.setText("Your Score is: " + i);

    label2.update();**

    public class GameBoard extends Canvas {

        protected int N;
        protected Tile[][] tile;
        int[][] boardData;
        protected int Score = 0;
        protected int MaxScore = 0;

        public GameBoard(Composite arg0, int arg1, int n) {
            super(arg0, arg1);

            N = n;
            boardData = new int[N][N];
            setLayout(new GridLayout(N, true));
            tile = new Tile[N][N];

        }

        public void initilizeValueInTile() {

            if (boardData != null) {
                for (int i = 0; i < N; i++)
                    for (int j = 0; j < N; j++) {

                        if (tile[i][j] == null) {
                            tile[i][j] = new Tile(this, SWT.BORDER);
                            tile[i][j].setLayoutData(new GridData(SWT.FILL, SWT.FILL, true, true));

                        }
                        tile[i][j].setValue(boardData[i][j]);

                    }
            }
        }


        public void setBoard(int[][] data) {
            boardData = data;
            initilizeValueInTile();

        }

        **

        public void SetScore(int s) {
            Score = s;

        }

        public int getScore() {
            return Score;**
        }


        public class GameView extends Observable implements View

        @Override
        public void displayScore(int score) {
            System.out.println(score);
            board.SetScore(score);


        }

Answer 1

要更新标签，您只需像以前一样致电label.setText。如果您想在更改分数时执行此操作，最简单的方法就是在label.setText或displayScore中调用SetScore（正常的Java名称为setScore）。这并不适合MVP模式，但我还是无法在你的代码中看到它。

Java-SWT：如何更新Label？

1 个答案: