我正在使用expo来构建React本机应用程序，并且它已经运行了好几天了。但是，它从无处不在开始给我一个不变的违规：“ main”尚未注册，这使我无法构建该应用程序。这是一张照片。Error as well as AppEntry.js file
此外，我一般来说对于博览会和反应本地人来说都是比较陌生的，所以有些事情我还是不明白。我到处都在寻找答案，但是没有任何效果。
答案 0 :(得分：0)
<!DOCTYPE html>
<html>
<head>
<meta name="viewport" content="width=device-width, initial-scale=1">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/css/bootstrap.min.css">
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.5.1/jquery.min.js"></script>
<script src="https://maxcdn.bootstrapcdn.com/bootstrap/3.4.1/js/bootstrap.min.js"></script>
<link rel="stylesheet" href="mystyle.css">
</head>
<body>
<div class="container1">
<header >
<!--Navigation-->
<nav class="navbar navbar-inverse navbar-fixed-top" style="background: transparent; border:none">
<div class="conatiner-fluid">
<!--page scroll button for -->
<div class="navbar-header" role="navigation">
<button type="button" class="navbar-toggle" data-toggle="collapse" data-target= "#myNavbar">
<span class="icon-bar"></span>
<span class="icon-bar"></span>
<span class="icon-bar"></span>
</button>
<a class="navbar-brand" href="#">Website</a>
</div> <!--page scroll button-->
<div>
<div class="collapse navbar-collapse" id="myNavbar" style="border: none; background-color:rgba(0, 0,0, 0);">
<ul class="nav navbar-nav navbar-right">
<li ><a href="#">Home</a></li>
<li ><a href="#about">About Us</a></li>
<li ><a href="#services">Our Products</a></li>
<li ><a href="#contact">Gallery</a></li>
<li ><a href="#contact">Download</a></li>
<li ><a href="#contact">Contact Us</a></li>
</ul>
</div> <!--ul-li-->
</div> <!--navbar collapse-->
</div> <!--container-fluid-->
</nav>
<!--Navigation-->
</header>
<div class="head-slider">
<div class="bgSlides">
<img src="https://cpimg.tistatic.com/13581/4/tr:q-100/template_photo_4.jpg">
<div class="text">caption one</div>
</div>
<div class="bgSlides">
<img src="https://cpimg.tistatic.com/13581/4/tr:q-100/template_photo_3.jpg">
<div class="text">Caption Two</div>
</div>
<div class="bgSlides">
<img src="https://cpimg.tistatic.com/13581/4/tr:q-100/template_photo_2.jpg">
<div class="text">Caption Three</div>
</div>
<div class="bgSlides ">
<img src="https://cpimg.tistatic.com/13581/4/tr:q-100/template_photo_1.jpg">
<div class="text">Caption four</div>
</div>
<div class="v-panel">
<a class="prev" onclick="plusSlides(-1)"><span class="glyphicon glyphicon-chevron-up"></span></a>
<div class="hold" id="img1">
</div>
<div class="hold" id="img2">
</div>
<div class="hold" id="img3">
</div>
<a class="next" onclick="plusSlides(1)"><span class="glyphicon glyphicon-chevron-down"></span></a>
</div>
</div>
</div>
<br>
</br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br></br>
<script src="myscript.js"></script>
</body>
</html> 文件夹node_modules文件（如果您使用的是yarn）yarn.lock或npm i（如果您使用yarn）再次运行安装