Phaser 游戏开发 XDK

Question

我正在使用 xdk 进行 Phaser html 5 游戏开发。 我正在使用他们网站上的示例点击计数器，但它不起作用。有人可以帮我吗？
下面是代码：

/* globals Phaser:false */
// create BasicGame Class
BasicGame = {

};

// create Game function in BasicGame
BasicGame.Game = function (game) {
};

var counter = 0;
// set Game function prototype
BasicGame.Game.prototype = {

    init: function () {
        // set up input max pointers
        this.input.maxPointers = 1;
        // set up stage disable visibility change
        this.stage.disableVisibilityChange = true;
        // Set up the scaling method used by the ScaleManager
        // Valid values for scaleMode are:
        // * EXACT_FIT
        // * NO_SCALE
        // * SHOW_ALL
        // * RESIZE
        // See http://docs.phaser.io/Phaser.ScaleManager.html for full document
        this.scale.scaleMode = Phaser.ScaleManager.SHOW_ALL;
        // If you wish to align your game in the middle of the page then you can
        // set this value to true. It will place a re-calculated margin-left
        // pixel value onto the canvas element which is updated on orientation /
        // resizing events. It doesn't care about any other DOM element that may
        // be on the page, it literally just sets the margin.
        this.scale.pageAlignHorizontally = true;
        this.scale.pageAlignVertically = true;
        // Force the orientation in landscape or portrait.
        // * Set first to true to force landscape. 
        // * Set second to true to force portrait.
        this.scale.forceOrientation(false, true);
        // Sets the callback that will be called when the window resize event
        // occurs, or if set the parent container changes dimensions. Use this 
        // to handle responsive game layout options. Note that the callback will
        // only be called if the ScaleManager.scaleMode is set to RESIZE.
        this.scale.setResizeCallback(this.gameResized, this);
        // Set screen size automatically based on the scaleMode. This is only
        // needed if ScaleMode is not set to RESIZE.
        this.scale.updateLayout(true);
        // Re-calculate scale mode and update screen size. This only applies if
        // ScaleMode is not set to RESIZE.
        this.scale.refresh();

    },

    preload: function () {

        // Here we load the assets required for our preloader (in this case a 
        // background and a loading bar)
        this.load.image('logo', 'asset/phaser.png');
    },

    create: function () {
        // Add logo to the center of the stage
        this.logo = this.add.sprite(
            this.world.centerX, // (centerX, centerY) is the center coordination
            this.world.centerY,
            'logo');
        // Set the anchor to the center of the sprite
        this.logo.anchor.setTo(0.5, 0.5);
        this.logo.inputEnabled = true;
        this.logo.events.onInputDown.add(onClickListener, this);

        //no add text on screen to check click counter
        this.counterLabel = this.add.text(250, 16, '' , {fill:'FFFFFF'});


    },

    onClickListener: function() {
        counter++;
    this.counterLabel.text = "You clicked " + counter + " times!";
    },

    gameResized: function (width, height) {

        // This could be handy if you need to do any extra processing if the 
        // game resizes. A resize could happen if for example swapping 
        // orientation on a device or resizing the browser window. Note that 
        // this callback is only really useful if you use a ScaleMode of RESIZE 
        // and place it inside your main game state.

    }

};

它正在抛出这个异常：

this.logo.events.onInputDown.add(onClickListener, this);

Answer 1

由于onClickListener 坐在BasicGame.Game.prototype 中，您应该从this 获得它：

this.logo.events.onInputDown.add(this.onClickListener, this);