box-client/assets/script/core/ctrl/LoadingCtrl.js

/**
 * 资源加载控制器
 */
cc.Class({
    extends: cc.Component,

    properties: {
        loadPrecentLabel: cc.Label
    },

    onLoad () {
        this.percent = 0;
    },

    backKeyOnClicked () {
        return this.node.active;
    },

    showLoadingAlert () {
        this.percent = 0;
        this.loadPrecentLabel.string = '已加载' + this.percent + '%';

        this.node.active = true;
        // 避免每个场景更新一遍ctrl
        // 这里直接通过getChildByName获取子节点
        let bg = this.node.getChildByName('bg');
        let icon = this.node.getChildByName('icon');
        let precent = this.node.getChildByName('precent');

        if (bg) {
            bg.active = false;
        }
        if (icon) {
            icon.active = false;
        }
        if (precent) {
            precent.active = false;
        }

        this.scheduleOnce(() => {
            if (bg) {
                bg.active = true;
            }
            if (icon) {
                icon.active = true;
            }
            if (precent) {
                precent.active = true;
            }
        }, 1);
    },

    updateLoadingProgress (completedCount, totalCount, item) {
        if (completedCount == totalCount) {
            this.node.active = false;
            this.percent = 0;
            return;
        }
        // 显示加载进度
        // totalCount 会在加载过程中增加导致总进度变小
        // 所以需要比较之前缓存进度大小,避免进度后退的情况
        let percent = Math.floor(completedCount / totalCount * 100);
        if (percent > this.percent) {
            this.percent = percent;
        }
        this.loadPrecentLabel.string = '已加载' + this.percent + '%';
    },

    /**
     * 显示提示
     *
     * @author libo
     * @date 2019-07-04
     * @param {*} tips
     */
    showTips (tips, duration, cb) {
        // 显示tips
        this.node.active = true;
        this.loadPrecentLabel.string = tips;

        if (G.FuncUtils.isNumber(duration) && duration > 0) {
            cc.tween(this.node)
                .delay(duration)
                .call(() => {
                    this.hideTips();
                    if (cb) {
                        cb();
                    }
                })
                .start();
        }

    },

    /**
     * 隐藏
     *
     * @author libo
     * @date 2019-07-04
     */
    hideTips () {
        // 隐藏tips
        this.node.active = false;
        this.node.stopAllActions();
    }
});