[游戏开发]CocosCreator3.x之点击穿透组件

引擎版本 3.4.1

脚本组件，挂载即用

ClickPenetrate.ts

import * as cc from 'cc';
import { _decorator, Component, Button, SystemEvent } from 'cc';
const { ccclass, property } = _decorator;

/**
 * 按钮 点击穿透
 * @author 神兽白泽
 */
@ccclass('ClickPenetrate')
export class ClickPenetrate extends Component {
    @property({ tooltip: "滑动会关闭 end 触摸事件" })
    private move_began_end: boolean = false;

    @property({ tooltip: "触摸开始", type: cc.EventHandler })
    private on_touch_began: Array<cc.EventHandler> = [];
    @property({ tooltip: "触摸移动", type: cc.EventHandler })
    private on_touch_move: Array<cc.EventHandler> = [];
    @property({ tooltip: "触摸结束", type: cc.EventHandler })
    private on_touch_end: Array<cc.EventHandler> = [];
    // @property({ tooltip: "触摸关闭", type: cc.EventHandler })
    // private on_touch_cancel: Array<cc.EventHandler> = [];

    private has_began: boolean = false;
    private comp_btn: cc.Button = null;
    onLoad() {
        this.comp_btn = this.node.getComponent(cc.Button) || this.node.addComponent(cc.Button);
        this.comp_btn.node.on(SystemEvent.EventType.TOUCH_START, this.onTouchBegan, this);
        this.comp_btn.node.on(SystemEvent.EventType.TOUCH_MOVE, this.onTouchMoved, this);
        this.comp_btn.node.on(SystemEvent.EventType.TOUCH_END, this.onTouchEnded, this);
        this.comp_btn.node.on(SystemEvent.EventType.TOUCH_CANCEL, this.onTouchCancelled, this);
    }

    private onTouchBegan(touch: cc.EventTouch, param: any): void {
        touch.preventSwallow = true;
        this.has_began = true;
        this.is_move = false;
        this.delta = new cc.Vec2(0, 0);
        this.on_touch_began.forEach((value, key) => { value.emit([this.comp_btn]) })
    }
    /** 是移动状态 */
    private is_move = null;
    /** 本次点击所移动的距离 */
    private delta: cc.Vec2 = new cc.Vec2(0, 0);
    private onTouchMoved(touch: cc.EventTouch, param: any): void {
        touch.preventSwallow = true;
        if (!this.has_began) return;
        this.on_touch_move.forEach((value, key) => { value.emit([this.comp_btn]) })

        let delta = touch.getDelta();
        this.delta.x += delta.x;
        this.delta.y += delta.y;
        const distance = this.delta.length();
        if (distance >= 20) this.is_move = true;// 滑动超过20像素，算作点击
    }
    private onTouchEnded(touch: cc.EventTouch, param: any): void {
        touch.preventSwallow = true;
        if (!this.has_began) return;
        if (this.move_began_end && this.is_move) return;
        this.on_touch_end.forEach((value, key) => { value.emit([this.comp_btn]) })
        this.has_began = false;
        this.is_move = false;
    }
    private onTouchCancelled(touch: cc.EventTouch, param: any): void {
        touch.preventSwallow = true;
    }
}

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