uni-preset-vue/template/default/App.vue

<script>
    export default {
        onLaunch() {
            console.log('App Launch')
        },
        onShow() {
            console.log('App Show')
        },
        onHide() {
            console.log('App Hide')
        }
    }
</script>

<style>
    /*每个页面公共css */
</style>