![在引导程序中居中表单不起作用]( "在引导程序中居中表单不起作用")
本文介绍了在引导程序中居中表单不起作用的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我试图将表单居中放置在 div 中，但我使用的方法不起作用.我尝试使用 bootstrap 文档中所述的 justify-content-center 属性，但它并未将其居中.当我尝试将它居中，但在我的 CSS 中应用 display: flex 和 justify-content: center 时，它被包裹在表单中时会失去方向并弄乱.我不知道如何将它居中，我哪里出错了.任何帮助表示赞赏.提前致谢.
.onlineRefilFormCon {显示:弹性；对齐内容:居中；对齐项目:居中；位置:绝对；顶部:50%；宽度:100%；高度:90%；}.onlineRefillTitleCon {显示:弹性；对齐内容:居中；对齐项目:居中；位置:绝对；顶部:0%；左:0%；宽度:100%；高度:10%；}.onlineRefillForm {位置:绝对；顶部:20%；宽度:40%；高度:80%；背景颜色:白色；box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;}.form-group {填充顶部:5%；}.col-form-label {字体粗细:600；}.form-check-input {边框:2px 实心；}.form-control {宽度:60%；边框:2px 实心；}.textarea{保证金最高:-10%；左边距:17%；边框:2px 实心；}.radio1 {保证金最高:3%；左边距:20%；}.form-check-inline {填充:0%；}.OnlineSubmitBtnCon {位置:绝对；底部:7%；宽度:100%；高度:10%；}.OnlineSubmitBtnCon 按钮 {左边距:35%；}
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js"integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script><div class="onlineRefilFormCon"><div class="onlineRefillTitleCon"><h2 class="onlineRefillTitle">在线补充</h2>
<form class="onlineRefillForm" id="onlineRefillForm"><div class="form-group row justify-content-center"><label for="text-input" class="col-2 col-form-label">名字</label><div class="col-10"><input class="form-control" type="text" value="" id="text-input">
<div class="form-group row justify-content-center"><label for="text-input" class="col-2 col-form-label">Last Name</label><div class="col-10"><input class="form-control" type="text" value="" id="text-input">
<div class="form-group row justify-content-center"><label for="date-input" class="col-2 col-form-label">日期</label><div class="col-10"><input class="form-control" type="date" value="yyyy-mm-dd" id="date-input">
<div class="form-group row justify-content-center"><label for="email-input" class="col-2 col-form-label">电子邮件</label><div class="col-10"><input class="form-control" type="email" value="" id="email-input">
<div class="form-check-inline radio1"><label class="form-check-label"><input type="radio" class="form-check-input" name="optionsRadios" id="optionsRadios1"value="option1" 选中>捡起
<div class="form-check-inline"><label class="form-check-label"><input type="radio" class="form-check-input" name="optionsRadios" id="optionsRadios2"值=选项2">送货
<div class="form-check-inline"><label class="form-check-label"><input type="radio" class="form-check-input" name="optionsRadios" id="optionsRadios2"值=选项2">邮件
<div class="form-group justify-content-center"><label for="textarea" class="col-2 col-form-label">笔芯详情</label><textarea class="form-control textarea" rows="7" placeholder="示例:赖诺普利"></textarea>
<div class="OnlineSubmitBtnCon"><button type="button" class="btn btn-primary contactUsSubmitBtn" onclick="proccessContactMessage()">提交</button>
</表单>
解决方案
如果要使表单元素居中对齐，应使用 text-align:center 样式.因此，您应该将 text-center 引导程序类添加到要居中对齐的元素中.
它对你有用吗?
I'm trying to center my form inside a div but the methods I'm using are not working. I tried using the justify-content-center attribute as stated by the bootstrap documentation but it is not centering it. When I try to center it but applying display: flex and justify-content: center in my CSS on the box it's wrapped in the form losses its orientation and messes up. I can't figure out how to center it, where did I go wrong. Any help is appreciated. Thanks in advance.
.onlineRefilFormCon {
display: flex;
justify-content: center;
align-items: center;
position: absolute;
top: 50%;
width: 100%;
height: 90%;
}
.onlineRefillTitleCon {
display: flex;
justify-content: center;
align-items: center;
position: absolute;
top: 0%;
left: 0%;
width: 100%;
height: 10%;
}
.onlineRefillForm {
position: absolute;
top: 20%;
width: 40%;
height: 80%;
background-color: white;
box-shadow: rgba(0, 0, 0, 0.35) 0px 5px 15px;
}
.form-group {
padding-top: 5%;
}
.col-form-label {
font-weight: 600;
}
.form-check-input {
border: 2px solid;
}
.form-control {
width: 60%;
border: 2px solid;
}
.textarea {
margin-top: -10%;
margin-left: 17%;
border: 2px solid;
}
.radio1 {
margin-top: 3%;
margin-left: 20%;
}
.form-check-inline {
padding: 0%;
}
.OnlineSubmitBtnCon {
position: absolute;
bottom: 7%;
width: 100%;
height: 10%;
}
.OnlineSubmitBtnCon button {
margin-left: 35%;
}
<script src="https://stackpath.bootstrapcdn.com/bootstrap/4.3.1/js/bootstrap.min.js" integrity="sha384-JjSmVgyd0p3pXB1rRibZUAYoIIy6OrQ6VrjIEaFf/nJGzIxFDsf4x0xIM+B07jRM" crossorigin="anonymous"></script>
<div class="onlineRefilFormCon">
<div class="onlineRefillTitleCon">
<h2 class="onlineRefillTitle">Online Refill</h2>
</div>
<form class="onlineRefillForm" id="onlineRefillForm">
<div class="form-group row justify-content-center">
<label for="text-input" class="col-2 col-form-label">First Name</label>
<div class="col-10">
<input class="form-control" type="text" value="" id="text-input">
</div>
</div>
<div class="form-group row justify-content-center">
<label for="text-input" class="col-2 col-form-label">Last Name</label>
<div class="col-10">
<input class="form-control" type="text" value="" id="text-input">
</div>
</div>
<div class="form-group row justify-content-center">
<label for="date-input" class="col-2 col-form-label">Date</label>
<div class="col-10">
<input class="form-control" type="date" value="yyyy-mm-dd" id="date-input">
</div>
</div>
<div class="form-group row justify-content-center">
<label for="email-input" class="col-2 col-form-label">Email</label>
<div class="col-10">
<input class="form-control" type="email" value="" id="email-input">
</div>
</div>
<div class="form-check-inline radio1">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optionsRadios" id="optionsRadios1"
value="option1" checked>
Pickup
</label>
</div>
<div class="form-check-inline">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optionsRadios" id="optionsRadios2"
value="option2">
Delivery
</label>
</div>
<div class="form-check-inline">
<label class="form-check-label">
<input type="radio" class="form-check-input" name="optionsRadios" id="optionsRadios2"
value="option2">
Mail
</label>
</div>
<div class="form-group justify-content-center">
<label for="textarea" class="col-2 col-form-label">Refill Details</label>
<textarea class="form-control textarea" rows="7" placeholder="Example: Lisinopril"></textarea>
</div>
<div class="OnlineSubmitBtnCon">
<button type="button" class="btn btn-primary contactUsSubmitBtn" onclick="proccessContactMessage()">Submit</button>
</div>
</form>
</div>
解决方案
If you want to align the form elements center, you should use text-align:center style. So you should add text-center bootstrap class into the elements which you want to align center.
Does it work for you?
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08-22 22:50