javascript - 重置 game.input.onDown 时使用哪个指针对象(即光标)

Question

我遇到了一个问题，需要以与 Phaser.Key.reset 相同的方式重置 game.input.onDown 事件。 。似乎这可以通过 Phaser.Pointer.reset 来实现。方法。不幸的是，Phaser.Input 类中似乎有一堆不同的潜在指针对象，并且我不确定需要将哪一个用于 game.input.onDown，即 says that it gets "dispatched each time a pointer is pressed down" 。我只是不太确定我需要使用哪个指针。有人能解释一下吗？

我想我实际上需要做这样的事情:

this.game.input.whicheverPointer.reset();

编辑:

Here is an example that mimics the the problem I'm having.

这是它的源代码:

var game = new Phaser.Game(800, 600, Phaser.CANVAS, "game", {preload: preload, create: create, update: update});

var dude;
var block;
var spacebar;
var gameOverText;

var gameOverCounter = 0;
var gameOverBool    = false;

function preload () {
  game.load.image("block", "assets/block.png");
  game.load.image("dude", "assets/phaser-dude.png");
}

function create () {
  dude  = game.add.sprite(373, 760, "dude");
  block = game.add.sprite(0, 505, "block");

  game.physics.arcade.enable(dude);
  game.physics.arcade.enable(block);

  dude.body.collideWorldBounds  = true;
  dude.body.gravity.y           = 200;

  block.body.collideWorldBounds = true;
  block.body.immovable          = true;

  block.body.velocity.x         = 100;
  block.body.bounce.x           = 1;

  spacebar = game.input.keyboard.addKey(Phaser.Keyboard.SPACEBAR);

  var jumpOrTryAgain = function () {
    if (gameOverBool === false) {
      dude.body.velocity.y = -250;
      // If you open up your JS / error console, you'll see that
      // this message gets printed an extra time each reset,
      // when you click. The spacebar doesn't have this problem
      // because of the `spacebar.reset()` call below.
      console.log("down");
    } else {
      dude.destroy();
      block.destroy();
      gameOverText.destroy();
      // Here, I can reset the spacebar, but I'm not sure what to do
      // for the click / touch event, which keeps getting the jumpOrTryAgain
      // callback added onto it.
      spacebar.reset();

      gameOverBool    = false;
      gameOverCounter = 0;

      create();
    }
  };

  game.input.onDown.add(jumpOrTryAgain);
  spacebar.onDown.add(jumpOrTryAgain);
}

function update () {

  function gameOver () {
    if (gameOverCounter === 0) {
      gameOverBool = true;
      dude.body.velocity.y  = 0;
      dude.body.velocity.x  = 0;
      block.body.velocity.x = 0;
      gameOverText = game.add.text(300, 200, "Game Over!", {fontSize: "16px", fill: "white"});
      gameOverCounter += 1;
    }
  }

  game.physics.arcade.collide(dude, block, gameOver);
}

正如您在上面的评论中所读到的，问题在于，当您递归调用 create 时，单击/触摸事件不断将 jumpOrTryAgain 回调添加到自身上。重置游戏。我需要一种重置点击/触摸事件的方法，类似于上面所示的 spacebar.reset() 。

Answer 1

game.input.onDown 由鼠标和触摸输入触发。如果您需要在每次调用后重置其回调，则可以使用 game.input.onDown.addOnce() (而不是 game.input.onDown.add() )以便回调在第一次运行后自动删除。