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本章將講解 Bootstrap 支持的另一個特性,輸入框組。輸入框組擴(kuò)展自 表單控件。使用輸入框組,您可以很容易地向基于文本的輸入框添加作為前綴和后綴的文本或按鈕。
通過向輸入域添加前綴和后綴的內(nèi)容,您可以向用戶輸入添加公共的元素。例如,您可以添加美元符號,或者在 Twitter 用戶名前添加 @,或者應(yīng)用程序接口所需要的其他公共的元素。
向 .form-control 添加前綴或后綴元素的步驟如下:
為了保持跨瀏覽器的兼容性,請避免使用 <select> 元素,因為它們在 WebKit 瀏覽器中不能完全渲染出效果。也不要直接向表單組應(yīng)用輸入框組的 class,輸入框組是一個孤立的組件。
下面的實例演示了基本的輸入框組:
<!DOCTYPE?html> <html> <head> ???<title>Bootstrap?實例?-?基本的輸入框組</title> ???<link?href="/bootstrap/css/bootstrap.min.css"?rel="stylesheet"> ???<script?src="/scripts/jquery.min.js"></script> ???<script?src="/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div?style="padding:?100px?100px?10px;"> ???<form?class="bs-example?bs-example-form"?role="form"> ??????<div?class="input-group"> ?????????<span?class="input-group-addon">@</span> ?????????<input?type="text"?class="form-control"?placeholder="twitterhandle"> ??????</div> ??????<br> ??????<div?class="input-group"> ?????????<input?type="text"?class="form-control"> ?????????<span?class="input-group-addon">.00</span> ??????</div> ??????<br> ??????<div?class="input-group"> ?????????<span?class="input-group-addon">$</span> ?????????<input?type="text"?class="form-control"> ?????????<span?class="input-group-addon">.00</span> ??????</div> ???</form> </div> </body> </html>
結(jié)果如下所示:
您可以通過向 .input-group 添加相對表單大小的 class(比如 .input-group-lg、input-group-sm、input-group-xs)來改變輸入框組的大小。輸入框中的內(nèi)容會自動調(diào)整大小。
下面的實例演示了這點:
<!DOCTYPE?html> <html> <head> ???<title>Bootstrap?實例?-?輸入框組的大小</title> ???<link?href="/bootstrap/css/bootstrap.min.css"?rel="stylesheet"> ???<script?src="/scripts/jquery.min.js"></script> ???<script?src="/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div?style="padding:?100px?100px?10px;"> ???<form?class="bs-example?bs-example-form"?role="form"> ??????<div?class="input-group?input-group-lg"> ?????????<span?class="input-group-addon">@</span> ?????????<input?type="text"?class="form-control"?placeholder="Twitterhandle"> ??????</div><br> ??????<div?class="input-group"> ?????????<span?class="input-group-addon">@</span> ?????????<input?type="text"?class="form-control"?placeholder="Twitterhandle"> ??????</div><br> ??????<div?class="input-group?input-group-sm"> ?????????<span?class="input-group-addon">@</span> ?????????<input?type="text"?class="form-control"?placeholder="Twitterhandle"> ??????</div> ???</form> </div> </body> </html>
結(jié)果如下所示:
您可以把復(fù)選框和單選插件作為輸入框組的前綴或者后綴元素,如下面的實例所示:
<!DOCTYPE?html> <html> <head> ???<title>Bootstrap?實例?-?輸入框組的復(fù)選框和單選插件</title> ???<link?href="/bootstrap/css/bootstrap.min.css"?rel="stylesheet"> ???<script?src="/scripts/jquery.min.js"></script> ???<script?src="/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div?style="padding:?100px?100px?10px;"> ???<form?class="bs-example?bs-example-form"?role="form"> ??????<div?class="row"> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<span?class="input-group-addon"> ??????????????????<input?type="checkbox"> ???????????????</span> ???????????????<input?type="text"?class="form-control"> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--><br> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<span?class="input-group-addon"> ??????????????????<input?type="radio"> ???????????????</span> ???????????????<input?type="text"?class="form-control"> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--> ??????</div><!--?/.row?--> ???</form> </div> </body> </html>
結(jié)果如下所示:
您也可以把按鈕作為輸入框組的前綴或者后綴元素,這個時候您就不是添加 .input-group-addon class,您需要使用 class .input-group-btn 來包裹按鈕。這是必需的,因為默認(rèn)的瀏覽器樣式不會被重寫。下面的實例演示了這點:
<!DOCTYPE?html> <html> <head> ???<title>Bootstrap?實例?-?輸入框組的按鈕插件</title> ???<link?href="/bootstrap/css/bootstrap.min.css"?rel="stylesheet"> ???<script?src="/scripts/jquery.min.js"></script> ???<script?src="/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div?style="padding:?100px?100px?10px;"> ???<form?class="bs-example?bs-example-form"?role="form"> ??????<div?class="row"> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<span?class="input-group-btn"> ??????????????????<button?class="btn?btn-default"?type="button"> ?????????????????????Go! ??????????????????</button> ???????????????</span> ???????????????<input?type="text"?class="form-control"> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--><br> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<input?type="text"?class="form-control"> ???????????????<span?class="input-group-btn"> ??????????????????<button?class="btn?btn-default"?type="button"> ?????????????????????Go! ??????????????????</button> ???????????????</span> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--> ??????</div><!--?/.row?--> ???</form> </div> </body> </html>
結(jié)果如下所示:
在輸入框組中添加帶有下拉菜單的按鈕,只需要簡單地在一個 .input-group-btn class 中包裹按鈕和下拉菜單即可,如下面的實例所示:
<!DOCTYPE?html> <html> <head> ???<title>Bootstrap?實例?-?輸入框組的下拉菜單按鈕</title> ???<link?href="/bootstrap/css/bootstrap.min.css"?rel="stylesheet"> ???<script?src="/scripts/jquery.min.js"></script> ???<script?src="/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div?style="padding:?100px?100px?10px;"> ???<form?class="bs-example?bs-example-form"?role="form"> ??????<div?class="row"> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<div?class="input-group-btn"> ??????????????????<button?type="button"?class="btn?btn-default? ?????????????????????dropdown-toggle"?data-toggle="dropdown"> ?????????????????????下拉菜單? ?????????????????????<span?class="caret"></span> ??????????????????</button> ??????????????????<ul?class="dropdown-menu"> ?????????????????????<li><a?href="#">功能</a></li> ?????????????????????<li><a?href="#">另一個功能</a></li> ?????????????????????<li><a?href="#">其他</a></li> ?????????????????????<li?class="divider"></li> ?????????????????????<li><a?href="#">分離的鏈接</a></li> ??????????????????</ul> ???????????????</div><!--?/btn-group?--> ???????????????<input?type="text"?class="form-control"> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--><br> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<input?type="text"?class="form-control"> ???????????????<div?class="input-group-btn"> ??????????????????<button?type="button"?class="btn?btn-default? ?????????????????????dropdown-toggle"?data-toggle="dropdown"> ?????????????????????下拉菜單? ?????????????????????<span?class="caret"></span> ??????????????????</button> ??????????????????<ul?class="dropdown-menu?pull-right"> ?????????????????????<li><a?href="#">功能</a></li> ?????????????????????<li><a?href="#">另一個功能</a></li> ?????????????????????<li><a?href="#">其他</a></li> ?????????????????????<li?class="divider"></li> ?????????????????????<li><a?href="#">分離的鏈接</a></li> ??????????????????</ul> ???????????????</div><!--?/btn-group?--> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--> ??????</div><!--?/.row?--> ???</form> </div> </body> </html>
結(jié)果如下所示:
在輸入框組中添加帶有下拉菜單的分割按鈕,使用與下拉菜單按鈕大致相同的樣式,但是對下拉菜單添加了主要的功能,如下面的實例所示:
<!DOCTYPE?html> <html> <head> ???<title>Bootstrap?實例?-?輸入框組中分割的下拉菜單按鈕</title> ???<link?href="/bootstrap/css/bootstrap.min.css"?rel="stylesheet"> ???<script?src="/scripts/jquery.min.js"></script> ???<script?src="/bootstrap/js/bootstrap.min.js"></script> </head> <body> <div?style="padding:?100px?100px?10px;"> ???<form?class="bs-example?bs-example-form"?role="form"> ??????<div?class="row"> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<div?class="input-group-btn"> ??????????????????<button?type="button"?class="btn?btn-default"? ?????????????????????tabindex="-1">下拉菜單 ??????????????????</button> ??????????????????<button?type="button"?class="btn?btn-default? ?????????????????????dropdown-toggle"?data-toggle="dropdown"?tabindex="-1"> ?????????????????????<span?class="caret"></span> ?????????????????????<span?class="sr-only">切換下拉菜單</span> ??????????????????</button> ??????????????????<ul?class="dropdown-menu"> ?????????????????????<li><a?href="#">功能</a></li> ?????????????????????<li><a?href="#">另一個功能</a></li> ?????????????????????<li><a?href="#">其他</a></li> ?????????????????????<li?class="divider"></li> ?????????????????????<li><a?href="#">分離的鏈接</a></li> ??????????????????</ul> ???????????????</div><!--?/btn-group?--> ???????????????<input?type="text"?class="form-control"> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--><br> ?????????<div?class="col-lg-6"> ????????????<div?class="input-group"> ???????????????<input?type="text"?class="form-control"> ???????????????<div?class="input-group-btn"> ??????????????????<button?type="button"?class="btn?btn-default"? ?????????????????????tabindex="-1">下拉菜單 ??????????????????</button> ??????????????????<button?type="button"?class="btn?btn-default? ?????????????????????dropdown-toggle"?data-toggle="dropdown"?tabindex="-1"> ?????????????????????<span?class="caret"></span> ?????????????????????<span?class="sr-only">切換下拉菜單</span> ??????????????????</button> ??????????????????<ul?class="dropdown-menu?pull-right"> ?????????????????????<li><a?href="#">功能</a></li> ?????????????????????<li><a?href="#">另一個功能</a></li> ?????????????????????<li><a?href="#">其他</a></li> ?????????????????????<li?class="divider"></li> ?????????????????????<li><a?href="#">分離的鏈接</a></li> ??????????????????</ul> ???????????????</div><!--?/btn-group?--> ????????????</div><!--?/input-group?--> ?????????</div><!--?/.col-lg-6?--> ??????</div><!--?/.row?--> ???</form> </div> </body> </html>
結(jié)果如下所示: