使用微信提供的自定义tabbar组件custom-tab-bar，总是出现this.getTabBar is not a function. (In \'this.getTabBar()\', \'this.getTabBar\' is undefined);
写的跟微信提供的自定义组件一模一样
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请具体描述问题出现的流程，并提供能复现问题的简单代码片段（https://developers.weixin.qq.com/miniprogram/dev/devtools/minicode.html）。
this.getTabBar().init();这是对的
this.getTabBar.init();这样会报错
建议上代码