使用.input-lg和.col-lg- *之类的类来设置表单的高度和宽度。
您可以尝试运行以下代码来设置表单的高度和宽度-
<!DOCTYPE html> <html> <head> <title>Bootstrap Example</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> <form role = "form"> <div class = "form-group"> <input class = "form-control input-lg" type = "text" placeholder =".input-lg"> </div> <div class = "form-group"> <input class = "form-control" type = "text" placeholder = "Default input"> </div> <div class = "form-group"> <input class = "form-control input-sm" type = "text" placeholder = ".input-sm"> </div> <div class = "form-group"></div> <div class = "form-group"> <select class = "form-control input-lg"> <option value = "">.input-lg</option> </select> </div> <div class = "form-group"> <select class = "form-control"> <option value = "">Default select</option> </select> </div> <div class = "form-group"> <select class = "form-control input-sm"> <option value = "">.input-sm</option> </select> </div> <div class = "row"> <div class = "col-lg-2"> <input type = "text" class = "form-control" placeholder = ".col-lg-2"> </div> <div class = "col-lg-3"> <input type = "text" class = "form-control" placeholder = ".col-lg-3"> </div> <div class = "col-lg-4"> <input type = "text" class = "form-control" placeholder = ".col-lg-4"> </div> </div> </form> </body> </html>