uniapp自定义页面跳转loading的实现代码

<script>
export default {
   globalData: {
      loading: false
   }
}
</script>

<template>
	<view class="container">
            <slot v-if="!loading"></slot>
            <view v-else class="center">
                <!-- loading组件可以自己实现, 不想自己写就找个网站cv一下 -->
                <!-- <loading></loading> -->
                加载中...
            </view>
	</view>
</template>

<script>
export default {
	name: 'pageLoading',
	data() {
            return {
                loading: false
            }
	},
	created() {
            this.loading = getApp().globalData.loading
            
            uni.$on('pageSwitch', res => {
                this.loading = res
                getApp().globalData.loading = res
            })
	}
}
</script>

<style lang="scss" scoped>
.center {
	position: fixed;
	top: 0;
	left: 0;
	right: 0;
	bottom: 0;
	height: 100%;
	display: flex;
	flex-direction: column;
	align-items: center;
	justify-content: center;
	background-color: rgba(0, 0, 0, 0.6);
}
</style>

<template>
   <page-loading>
      <button @click="jump">跳转</button>
   </page-loading>
</template>
<script>
// 嫌麻烦注册个全局组件
import pageLoading from '../../components/pageLoading/index.vue'
export default {
   components: { pageLoading },
   methods: {
      jump() {
         uni.$emit('pageSwitch', true)
         uni.switchTab({
            url: '/pages/my/my'
         })
      }
   }
}
</script>

const switchTabBarInterceptor = () => {
    uni.addInterceptor('switchTab', {
        success: function (res) {
           uni.$emit('pageSwitch', true)
        },
        complete() {
           uni.$emit('pageSwitch', false)
        }
    })
}
switchTabBarInterceptor()
// 丢main.js 里面就好了..

export class Jump {
     tabBarPage = []
    /**
     * Jump类构造函数
     * @param {Array} tabBar - 底部tab栏的页面列表
     */
    constructor(tabBar) {
        this.tabBarPage = tabBar
    }

    /**
     * 将传入的参数转化成URL参数字符串
     * @param {Object} params - 需要转化的参数对象
     * @returns {string} - 转化后的URL参数字符串
     */
    parseParams(params) {
        return Object.entries(params).map(([key, value]) => `${key}=${encodeURIComponent(value)}`).join('&')
    }

    /**
     * 跳转到某一个页面
     * @param {string} url - 需要跳转的页面路径
     * @param {Object} params - 需要传递的参数对象
     */
    push(url, params = {}) {
        const urlWithParams = Object.keys(params).length ? `${url}?${this.parseParams(params)}` : url
        const isTabBarPage = this.tabBarPage.some(page => page === url)

        if (isTabBarPage) {
            // 还是老样子，在跳转之前开启loading
            uni.$emit('pageSwitch', true)
            uni.switchTab({ url: urlWithParams })
        }
        else {
            uni.navigateTo({ url: urlWithParams })
        }
    }
}

/**
 * @typedef {Object} Vue
 * @property {Jump} $jump - 跳转类实例
 */
Vue.prototype.$jump = new Jump(['/pages/index/index', '/pages/my/my'])

// request.js
class Http {
    ...
    request(..., closeLoading = false) {
        // ...
        uni.request({
            complete() {
                if(closeLoading) uni.$emit('pageSwitch', false)
            }
        })
        // ...
    }
}

// api.js
const http = new Http()
const fetchOrderList = () => http.request(..., true)