8.cc.Button组件使用详解

1. cc.Button

添加按钮的方法 2种方式
    (1)直接创建带Button组件的节点;
    (2) 先创建节点，再添加组件;
按钮组件, 按钮是游戏中最常用的组件, 点击然后响应事件;
按钮的过渡效果:
    过渡: 普通状态, 鼠标滑动到物体上, 按下状态, 禁用状态
    (1)没有过渡，只有响应事件;
    (2)颜色过渡, 过渡效果中使用颜色;
    (3)精灵过渡，使用图片过渡;
    (4)缩放过渡, 选项，在disable的时候是否置灰;
按钮禁用;
按钮添加响应事件 --> 节点-->组件 --> 代码的函数;
按钮传递自定义参数; ---> 字符串对象;
Button响应这个触摸点击，所以Button所挂的这个节点，一定要有大小,如果你向大小(0, 0)的节点上，挂一个Button,这个是无法响应点击事件;

 

2. 代码使用cc.Button

代码添加/获取cc.Button组件;
代码里面添加按钮的响应事件;
代码触发按钮指定的回掉函数;
Component.EventHandler
      var eventHandler = new cc.Component.EventHandler();
      eventHandler.target = newTarget;
      eventHandler.component = "MainMenu";
      eventHandler.handler = "OnClick";     
      eventHandler.customEventData = "my data";
      eventHandler.emit(["param1", "param2", ....]);

 

例:game_scene.js

// Learn cc.Class:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/class.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/class.html
// Learn Attribute:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/reference/attributes.html
//  - [English] http://docs.cocos2d-x.org/creator/manual/en/scripting/reference/attributes.html
// Learn life-cycle callbacks:
//  - [Chinese] https://docs.cocos.com/creator/manual/zh/scripting/life-cycle-callbacks.html
//  - [English] https://www.cocos2d-x.org/docs/creator/manual/en/scripting/life-cycle-callbacks.html

cc.Class({
    extends: cc.Component,

    properties: {
        // foo: {
        //     // ATTRIBUTES:
        //     default: null,        // The default value will be used only when the component attaching
        //                           // to a node for the first time
        //     type: cc.SpriteFrame, // optional, default is typeof default
        //     serializable: true,   // optional, default is true
        // },
        // bar: {
        //     get () {
        //         return this._bar;
        //     },
        //     set (value) {
        //         this._bar = value;
        //     }
        // },

        //获取button 编辑器直接获取
        button: {
            default: null,
            type: cc.Button,
        },

    },

    // LIFE-CYCLE CALLBACKS:

    onLoad () {

        //获取button 代码获取
        this.my_button = this.node.getChildByName("ks_up").getComponent(cc.Button);

        //添加button组件
        this.red_button = this.node.getChildByName("red_button").addComponent(cc.Button);
        //添加响应函数
        var click_event = new cc.Component.EventHandler();
        click_event.target = this.node;
        click_event.component = "game_scene";
        click_event.handler = "on_red_button_click";
        click_event.customEventData = "red_button_custom_data77777777777";
        // this.red_button.clickEvents = [click_event];
        this.red_button.clickEvents.push(click_event);
        //end

        //代码触发按钮的响应事件,不需要自己触摸
        this.scheduleOnce(function() {
            var click_events = this.red_button.clickEvents;
            for(var i = 0; i < click_events.length; i++) {
                var comp_env_handle = click_events[i];
                comp_env_handle.emit(["", "auto_event_66666666666"]);
            }
        }, 3);

    },

    on_red_button_click: function(e, custom) {
        console.log("on_red_button_click", custom);
    },

    //关卡按钮1-10,  e-->触摸事件  leve-->第几关 为字符串
    on_button_click: function(e, level) {
        level = parseInt(level);
        console.log("on_button_click call!!!", level);
    },

    start () {

    },

    // update (dt) {},
});

工程截图