feat(lifecycle): onLastPageBackPress

App.vue

 <script>
-    export default {
-        onLaunch: function() {
-            console.log('App Launch')
+export default {
+  onLaunch: function () {
+    console.log("App Launch");
 
     // const performance: Performance = uni.getPerformance()
     // const observer1: PerformanceObserver = performance.createObserver((entryList: PerformanceObserverEntryList) => {
@@ -9,45 +9,49 @@
     // })
     // observer1.observe({ entryTypes: ['render', 'navigation'] } as PerformanceObserverOptions)
   },
-        onShow: function() {
-            console.log('App Show')
+  onShow: function () {
+    console.log("App Show");
   },
-        onHide: function() {
-            console.log('App Hide')
-        }
-    }
+  onHide: function () {
+    console.log("App Hide");
+  },
+  onLastPageBackPress: function (): boolean | null {
+    console.log("App LastPageBackPress");
+    return null;
+  },
+};
 </script>
 
 <style>
-    /*每个页面公共css */
-    @import './common/uni.css';
+/*每个页面公共css */
+@import "./common/uni.css";
 
-    /* #ifdef H5 */
-    @media screen and (min-width: 768px) {
+/* #ifdef H5 */
+@media screen and (min-width: 768px) {
   body {
     overflow-y: scroll;
   }
-    }
+}
 
-    /* 顶栏通栏样式 */
-    /* .uni-top-window {
+/* 顶栏通栏样式 */
+/* .uni-top-window {
   	    left: 0;
   	    right: 0;
   	} */
 
-    uni-page-body {
-        background-color: #F5F5F5 !important;
+uni-page-body {
+  background-color: #f5f5f5 !important;
   min-height: 100% !important;
   height: auto !important;
-    }
+}
 
-    .uni-top-window uni-tabbar .uni-tabbar {
+.uni-top-window uni-tabbar .uni-tabbar {
   background-color: #fff !important;
-    }
+}
 
-    .uni-app--showleftwindow .hideOnPc {
+.uni-app--showleftwindow .hideOnPc {
   display: none !important;
-    }
+}
 
-    /* #endif */
+/* #endif */
 </style>