refactor(onLastPageBackPress): 条件编译指定平台

App.vue

-<!-- HBuilder X 版本要求: 3.6.11+ -->
-<script lang="ts">
-let firstBackTime = 0
-export default {
-  onLaunch: function () {
-    console.log('App Launch')
-  },
-  onShow: function () {
-    console.log('App Show')
-  },
-  onHide: function () {
-    console.log('App Hide')
-  },
-  onLastPageBackPress: function () {
-    // #ifdef UNI-APP-X && APP-ANDROID
-    console.log('App LastPageBackPress')
-    if (firstBackTime == 0) {
-      uni.showToast({
-        title: '再按一次退出应用',
-        position: 'bottom',
-      })
-      firstBackTime = Date.now()
-      setTimeout(() => {
-        firstBackTime = 0
-      }, 2000)
-    } else if (Date.now() - firstBackTime < 2000) {
-      firstBackTime = Date.now()
-      uni.exit()
-    }
-    // #endif
-  },
-  onExit() {
-    console.log('App Exit')
-  },
-}
-</script>
-
-<style>
-/*每个页面公共css */
-/* uni.css - 通用组件、模板样式库，可以当作一套ui库应用 */
-/* #ifdef APP-VUE */
-@import './common/uni.css';
-/* #endif */
-</style>
+<!-- HBuilder X 版本要求: 3.6.11+ -->
+<script lang="ts">
+  let firstBackTime = 0
+  export default {
+    onLaunch: function () {
+      console.log('App Launch')
+    },
+    onShow: function () {
+      console.log('App Show')
+    },
+    onHide: function () {
+      console.log('App Hide')
+    },
+    // #ifdef UNI-APP-X && APP-ANDROID
+    onLastPageBackPress: function () {
+      console.log('App LastPageBackPress')
+      if (firstBackTime == 0) {
+        uni.showToast({
+          title: '再按一次退出应用',
+          position: 'bottom',
+        })
+        firstBackTime = Date.now()
+        setTimeout(() => {
+          firstBackTime = 0
+        }, 2000)
+      } else if (Date.now() - firstBackTime < 2000) {
+        firstBackTime = Date.now()
+        uni.exit()
+      }
+    },
+    // #endif
+    onExit() {
+      console.log('App Exit')
+    },
+  }
+</script>
+
+<style>
+  /*每个页面公共css */
+  /* uni.css - 通用组件、模板样式库，可以当作一套ui库应用 */
+  /* #ifdef APP-VUE */
+  @import './common/uni.css';
+  /* #endif */
+</style>
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