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<form role="form" class="form-horizontal">
<div class="form-group has-error has-feedback">
<div class="row">
<label class="control-label col-xs-2 " for="inputerr1">错误状态</label>
<div class="col-xs-5">
<input type="text" class="form-control" id="inputerr1" placeholder="错误状态">
<span class="glyphicon glyphicon-remove form-control-feedback"></span>
</div>
<span class="col-xs-5 help-block">你输入的信息是有误的</span>
</div>
</div>
<div class="form-group">
<label class="control-label" for="inputSuccess1">成功状态</label>
<div class="row">
<div class="col-xs-6">
<input type="text" class="form-control" id="inputSuccess1" placeholder="成功状态">
</div>
<span class="col-xs-6 help-block">你输入的信息是正确的</span>
</div>
</div>
</form>
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不过有一个细节需要注意,使用”col-md-offset-*”对列进行向右偏移时,要保证列与偏移列的总数不超过12,不然会致列断行显示,如:
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任意组合列与列,只是他们的组合数之和不要超过总列数。
如果每行网格数超过12会怎么样?
他会自动移动到下一行
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注意:虽然在Bootstrap框架中使用任何标签元素都可以实现按钮风格,但个人并不建议这样使用,为了避免浏览器兼容性问题,个人强烈建议使用button或a标签来制作按钮。
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媒体对象与媒体主体顺序不能调整,否则会打破二者之间分离的格局。调换左右顺序靠媒体对象中的类pull-right、pull-left
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①×——是一个HTML转义字符,表示叉号
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下拉菜单项的默认状态有:悬浮状态和焦点状态
还有当前状态和禁用状态
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特别声明:因为Bootstrap的组件交互效果都是依赖于jQuery库写的插件,所以在使用bootstrap.min.js之前一定要先加载jquery.min.js才会生效果。
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引入Bootstrap必须先引入jQuery。
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差一点懵逼
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<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>基础表单</title>
<link rel="stylesheet" href="//netdna.bootstrapcdn.com/bootstrap/3.1.1/css/bootstrap.min.css">
</head>
<body>
<form role="form">
<div class="form-group">
<label for="exampleInputEmail1">邮箱:</label>
<input type="email" class="form-control" id="exampleInputEmail1" placeholder="请输入您的邮箱地址">
</div>
<div class="form-group">
<label for="exampleInputPassword1">密码</label>
<input type="password" class="form-control" id="exampleInputPassword1" placeholder="请输入您的邮箱密码">
</div>
<div class="checkbox">
<label>
<input type="checkbox"> 记住密码
</label>
</div>
<button type="submit" class="btn btn-default">进入邮箱</button>
</form>
</body>
</html>
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ggggggg
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<ul class="list-unstyled">
<li>...</li>
</ul>
内联列表
<ul class="list-inline">
<li>...</li>
</ul>
水平排列的描述
<dl class="dl-horizontal">
<dt>...</dt>
<dd>...</dd>
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<!DOCTYPE html>
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>JS贪吃蛇-练习</title>
<style type="text/css">
#pannel table {
border-collapse: collapse;
}
#pannel table td {
border: 1px solid #808080;
width: 10px;
height: 10px;
font-size: 0;
line-height: 0;
overflow: hidden;
}
#pannel table .snake {
background-color: green;
}
#pannel table .food {
background-color: blue;
}
</style>
<script type="text/javascript">
var Direction = new function () {
this.UP = 38;
this.RIGHT = 39;
this.DOWN = 40;
this.LEFT = 37;
};
var Common = new function () {
this.width = 20; /*水平方向方格数*/
this.height = 20; /*垂直方向方格数*/
this.speed = 250; /*速度 值越小越快*/
this.workThread = null;
};
var Main = new function () {
var control = new Control();
window.onload = function () {
control.Init("pannel");
/*开始按钮*/
document.getElementById("btnStart").onclick = function () {
control.Start();
this.disabled = true;
document.getElementById("selSpeed").disabled = true;
document.getElementById("selSize").disabled = true;
};
/*调速度按钮*/
document.getElementById("selSpeed").onchange = function () {
Common.speed = this.value;
}
/*调大小按钮*/
document.getElementById("selSize").onchange = function () {
Common.width = this.value;
Common.height = this.value;
control.Init("pannel");
}
};
};
/*控制器*/
function Control() {
this.snake = new Snake();
this.food = new Food();
/*初始化函数,创建表格*/
this.Init = function (pid) {
var html = [];
html.push("<table>");
for (var y = 0; y < Common.height; y++) {
html.push("<tr>");
for (var x = 0; x < Common.width; x++) {
html.push('<td id="box_' + x + "_" + y + '"> </td>');
}
html.push("</tr>");
}
html.push("</table>");
this.pannel = document.getElementById(pid);
this.pannel.innerHTML = html.join("");
};
/*开始游戏 - 监听键盘、创建食物、刷新界面线程*/
this.Start = function () {
var me = this;
this.MoveSnake = function (ev) {
var evt = window.event || ev;
me.snake.SetDir(evt.keyCode);
};
try {
document.attachEvent("onkeydown", this.MoveSnake);
} catch (e) {
document.addEventListener("keydown", this.MoveSnake, false);
}
this.food.Create();
Common.workThread = setInterval(function () {
me.snake.Eat(me.food); me.snake.Move();
}, Common.speed);
};
}
/*蛇*/
function Snake() {
this.isDone = false;
this.dir = Direction.RIGHT;
this.pos = new Array(new Position());
/*移动 - 擦除尾部,向前移动,判断游戏结束(咬到自己或者移出边界)*/
this.Move = function () {
document.getElementById("box_" + this.pos[0].X + "_" + this.pos[0].Y).className = "";
//所有 向前移动一步
for (var i = 0; i < this.pos.length - 1; i++) {
this.pos[i].X = this.pos[i + 1].X;
this.pos[i].Y = this.pos[i + 1].Y;
}
//重新设置头的位置
var head = this.pos[this.pos.length - 1];
switch (this.dir) {
case Direction.UP:
head.Y--;
break;
case Direction.RIGHT:
head.X++;
break;
case Direction.DOWN:
head.Y++;
break;
case Direction.LEFT:
head.X--;
break;
}
this.pos[this.pos.length - 1] = head;
//遍历画蛇,同时判断游戏结束
for (var i = 0; i < this.pos.length; i++) {
var isExits = false;
for (var j = i + 1; j < this.pos.length; j++)
if (this.pos[j].X == this.pos[i].X && this.pos[j].Y == this.pos[i].Y) {
isExits = true;
break;
}
if (isExits) { this.Over();/*咬自己*/ break; }
var obj = document.getElementById("box_" + this.pos[i].X + "_" + this.pos[i].Y);
if (obj) obj.className = "snake"; else { this.Over();/*移出边界*/ break; }
}
this.isDone = true;
};
/*游戏结束*/
this.Over = function () {
clearInterval(Common.workThread);
alert("游戏结束!");
}
/*吃食物*/
this.Eat = function (food) {
var head = this.pos[this.pos.length - 1];
var isEat = false;
switch (this.dir) {
case Direction.UP:
if (head.X == food.pos.X && head.Y == food.pos.Y + 1) isEat = true;
break;
case Direction.RIGHT:
if (head.Y == food.pos.Y && head.X == food.pos.X - 1) isEat = true;
break;
case Direction.DOWN:
if (head.X == food.pos.X && head.Y == food.pos.Y - 1) isEat = true;
break;
case Direction.LEFT:
if (head.Y == food.pos.Y && head.X == food.pos.X + 1) isEat = true;
break;
}
if (isEat) {
this.pos[this.pos.length] = new Position(food.pos.X, food.pos.Y);
food.Create(this.pos);
}
};
/*控制移动方向*/
this.SetDir = function (dir) {
switch (dir) {
case Direction.UP:
if (this.isDone && this.dir != Direction.DOWN) { this.dir = dir; this.isDone = false; }
break;
case Direction.RIGHT:
if (this.isDone && this.dir != Direction.LEFT) { this.dir = dir; this.isDone = false; }
break;
case Direction.DOWN:
if (this.isDone && this.dir != Direction.UP) { this.dir = dir; this.isDone = false; }
break;
case Direction.LEFT:
if (this.isDone && this.dir != Direction.RIGHT) { this.dir = dir; this.isDone = false; }
break;
}
};
}
/*食物*/
function Food() {
this.pos = new Position();
/*创建食物 - 随机位置创建立*/
this.Create = function (pos) {
document.getElementById("box_" + this.pos.X + "_" + this.pos.Y).className = "";
var x = 0, y = 0, isCover = false;
/*排除蛇的位置*/
do {
x = parseInt(Math.random() * (Common.width - 1));
y = parseInt(Math.random() * (Common.height - 1));
isCover = false;
if (pos instanceof Array) {
for (var i = 0; i < pos.length; i++) {
if (x == pos[i].X && y == pos[i].Y) {
isCover = true;
break;
}
}
}
} while (isCover);
this.pos = new Position(x, y);
document.getElementById("box_" + x + "_" + y).className = "food";
};
}
function Position(x, y) {
this.X = 0;
this.Y = 0;
if (arguments.length >= 1) this.X = x;
if (arguments.length >= 2) this.Y = y;
}
</script>
</head>
<body>
<div id="pannel" ></div>
<select id="selSize">
<option value="20">20*20</option>
<option value="30">30*30</option>
<option value="40">40*40</option>
</select>
<select id="selSpeed">
<option value="500">速度-慢</option>
<option value="250" selected="selected">速度-中</option>
<option value="100">速度-快</option>
</select>
<input type="button" id="btnStart" value="开始" />
</body>
</html>
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