求助，学写小程序代码总是提示：Do not have ontap handler in cur...

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{
  "pages": [
    "pages/welcome/welcome",
    "pages/posts/post"
  ],
  "window":{
    "navigationBarBackgroundColor":"#b3d4db"
  }
}




Do not have ontap handler in current page: pages/welcome/welcome. Please make sure that ontap handler has been defined in pages/welcome/welcome, or pages/welcome/welcome has been added into app.json
console.warn @ VM2096:1
t.warn @ WAService.js:18
z @ WAService.js:17
(anonymous) @ WAService.js:17
(anonymous) @ WAService.js:18
(anonymous) @ WAService.js:6
e.(anonymous function) @ WAService.js:4
a @ VM2101 appservice:1008
e.registerCallback @ VM2101 appservice:1008
m.forEach @ VM2101 appservice:1008
d @ VM2101 appservice:1008
j.onmessage @ VM2101 appservice:1008