uni-app页面监听、传参、通信
<h1>问题1：uni-app页面返回上一页 界面不刷新</h1><h1>问题2：进入页面修改后上个页面参数无法发送改变</h1>
<h2><span style="color: rgba(0, 0, 0, 1)">在父页面添加</span></h2>
<div class="cnblogs_code">
<pre><span style="color: rgba(0, 0, 0, 1)">
let that </span>= <span style="color: rgba(0, 0, 255, 1)">this</span><span style="color: rgba(0, 0, 0, 1)">;
uni.$on(</span><span style="color: rgba(128, 0, 0, 1)">'</span><span style="color: rgba(128, 0, 0, 1)">relationInit</span><span style="color: rgba(128, 0, 0, 1)">'</span><span style="color: rgba(0, 0, 0, 1)">,function(data){
that.getUserDeptCompany()
})
onUnload() { //销毁
uni.$off('relationInit')
},</span></pre>
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<p><img src="https://img2020.cnblogs.com/blog/1665938/202112/1665938-20211218115753852-142434674.png" alt="" loading="lazy"></p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<p> </p>
<h2>子页面 执行完修改 在回调处添加</h2>
<div class="cnblogs_code">
<pre> uni.$emit(<span style="color: rgba(128, 0, 0, 1)">'</span><span style="color: rgba(128, 0, 0, 1)">relationInit</span><span style="color: rgba(128, 0, 0, 1)">'</span>,{msg:<span style="color: rgba(128, 0, 0, 1)">'</span><span style="color: rgba(128, 0, 0, 1)">页面更新</span><span style="color: rgba(128, 0, 0, 1)">'</span>})</pre>
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<p> </p>
<p> </p>
<p>问题2：</p>
<p>A页面 前往B页面修改内容</p>
<p><img src="https://img2020.cnblogs.com/blog/1665938/202112/1665938-20211218140829562-1402877424.png" alt="" loading="lazy"></p>
<p> </p>
<p> </p>
<p>B页面接收参数</p>
<p><img src="https://img2020.cnblogs.com/blog/1665938/202112/1665938-20211218140925790-34584390.png" alt="" loading="lazy"></p>
<p> </p>
<p> B页面执行修改</p>
<p><img src="https://img2020.cnblogs.com/blog/1665938/202112/1665938-20211218141448953-132770683.png" alt="" loading="lazy"></p>
<p> </p>
<p> </p>
<p> </p>
<p> 返回到A页面</p>
<p><img src="https://img2020.cnblogs.com/blog/1665938/202112/1665938-20211218141035194-2085101126.png" alt="" loading="lazy"></p>
<p> </p>
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来源：https://www.cnblogs.com/aknife/p/15704713.html
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