game_cocos_2c/assets/scripts/utils/UIHelper.ts

import { Button, Color, Component, Node, UIOpacity, UIRenderer, find } from "cc";

export function addBtnClick(btn: Button | Node, onClick: Function, target?) {
    if (btn instanceof Node) {
        btn.on(Node.EventType.TOUCH_END, onClick, target);
        return;
    }

    if (btn instanceof Button) {
        btn.node.on(Button.EventType.CLICK, onClick, target);
        return;
    }
}

export function removeBtnClick(btn: Button | Node, onClick, target) {
    if (btn instanceof Node) {
        btn.off(Node.EventType.TOUCH_END, onClick, target);
        return;
    }

    if (btn instanceof Button) {
        btn.node.off(Button.EventType.CLICK, onClick, target);
        return;
    }
}

/**
 * 设置透明度
 * @param ui 
 * @param alpha  0 ~ 1;
 * @returns 
 */
export function setAlpha(ui: UIRenderer | Node, alpha: number) {

    if (ui instanceof Node) {
        const comp = ui.getComponent(UIOpacity) || ui.addComponent(UIOpacity);
        comp.opacity = alpha;
        return;
    }

    let color = ui.color.clone();
    color.a = 255 * alpha;
    ui.color = color;
}