Do not have tapName handler in current

Do not have tapName handler in current page: pages/index/city/city. Please make sure that tapName handler has been defined in pages/index/city/city, or pages/index/city/city has been added into app.json

js里有这个事件，为什么还是提示这个，并且事件也没触发。

我百度，他们说需要换app.json里注册页面的位置。。我换了也没什么变化啊，到底怎么换呢~

这个问题大家是怎么解决的