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 () {
    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(null)
    }
  },
}
</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>