box-client/assets/script/launch/view/HotUpdateTipLabel.js

cc.Class({
    extends: cc.Component,

    editor: {
        menu: 'Launch/HotUpdateTipLabel'
    },

    properties: {
        deltaTime: cc.Float
    },

    onEnable () {
        this._count = 0;
        this._default = '更新中';
        let label = this.node.getComponent(cc.Label);
        this.schedule(() => {
            let index = this._count % 3;
            cc.log('index ' + index);
            label.string = this._getLabelStr(index);
            this._count += 1;
            if (this._count > 3) {
                this._count = 0;
            }
        }, this.deltaTime);
    },

    onDisable () {
        this.unscheduleAllCallbacks();
    },

    _getLabelStr (index) {
        switch (index) {
            case 0:
                return this._default + '.';
            case 1:
                return this._default + '..';
            case 2:
                return this._default + '...';
        }
    }

});