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<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>Document</title>
<style type="text/css">
*{
margin:0;
padding: 0;
}
table{
border-spacing: 0;
border-collapse:0;
}
td{
border:1px solid #eee;
width:50px;
height:50px;
text-align:center;
font-weight: bold;
box-sizing:border-box;
}
.blank{
border:none;
}
#robot-box{
background:url(./img/QQ.jpg) no-repeat;
background-size: contain;
width:50px;
height:50px;
position:absolute;
top:50px;
left:50px;
transition: all 1s;
}
ul{
position:absolute;
top:50px;
right:50px;
font-size:1.5rem;
}
</style>
</head>
<body>
<table>
<tr>
<td class="blank"></td>
<td class="blank">1</td>
<td class="blank">2</td>
<td class="blank">3</td>
<td class="blank">4</td>
<td class="blank">5</td>
<td class="blank">6</td>
<td class="blank">7</td>
<td class="blank">8</td>
<td class="blank">9</td>
<td class="blank">10</td>
</tr>
<tr>
<td class="blank">1</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">2</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">3</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">4</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">5</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">6</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">7</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">8</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">9</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
<tr>
<td class="blank">10</td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
<td></td>
</tr>
</table>
<!-- <div class="robot-box" id="robot-box"></div> -->
<input type="text" id="command_input">
<input type="button" id="command_button" value="GO">
<input type="button" id="turn_left" value="TUN LEF">
<input type="button" id="turn_right" value="TUN RIG">
<input type="button" id="turn_back" value="TUN BAC">
<ul>
<li>GO：确认按钮，不填任何指令则默认向头顶朝的方向前进一格</li>
<li>TUN LEF：向左转（逆时针旋转90度）</li>
<li>TUN RIG：向右转（顺时针旋转90度）</li>
<li>TUN BAC：向右转（旋转180度）</li>
<li>TRA LEF：向屏幕的左侧移动一格，方向不变</li>
<li>TRA TOP：向屏幕的上面移动一格，方向不变</li>
<li>TRA RIG：向屏幕的右侧移动一格，方向不变</li>
<li>TRA BOT：向屏幕的下面移动一格，方向不变</li>
<li>MOV LEF：方向转向屏幕左侧，并向屏幕的左侧移动一格</li>
<li>MOV TOP：方向转向屏幕上面，向屏幕的上面移动一格</li>
<li>MOV RIG：方向转向屏幕右侧，向屏幕的右侧移动一格</li>
<li>MOV BOT：方向转向屏幕下面，向屏幕的下面移动一格</li>
</ul>
<script type="text/javascript">
// var robot = document.getElementById("robot_box");
var cmd_btn = document.getElementById("command_button");
//用GO去监听文本框的所以i不拿文本框了
var t_left = document.getElementById("turn_left");
var t_right = document.getElementById("turn_right");
var t_back = document.getElementById("turn_back");
class RobotBox {
constructor(){
this.deg = 0;
this.face = 0;
this.xPos = 50;
this.yPos = 50;
this.robot = document.createElement("div");
}
turnLeft(){
this.deg -= 90;
this.robot.style.transform = "rotateZ(" +this.deg + "deg)";
this.face=(this.face+4-1)%4;
}
turnRight(){
this.deg+=90;
this.robot.style.transform = "rotateZ("+this.deg+"deg)";
// this.robot.style="transform: rotateZ(90deg);background-color:red;";
//这样直接修改style才需要写；
//rotateZ里面不能写; 因为我们修改的是transform
//style="transform: rotateZ(90deg);"自动添加;
this.face=(this.face+1)%4;
}
turnBack(){
this.deg+=180;
this.robot.style.transform = "rotateZ("+this.deg+"deg)";
this.face=(this.face+2)%4;
}
go(){
var command_input = document.getElementById("command_input").value;
if(command_input=="TUN LEF")
{
this.turnLeft();
}
else if(command_input=="TUN RIG"){
this.turnRight();
}
else if(command_input=="TUN BAG"){
this.turnBack();
}
else if(command_input=="")
{
if(this.face==0)
{
if(this.yPos-50>=50)
{
this.yPos-=50;
this.robot.style.top = this.yPos+"px";
}
}
else if(this.face==1)
{
if(this.xPos+50<=550)
{
this.xPos+=50;
this.robot.style.left = this.xPos+"px";
}
}
else if(this.face==2){
if(this.yPos+50<=550)
{
this.yPos+=50;
this.robot.style.top = this.yPos+"px";
}
}
else if(this.face==3)
{
if(this.xPos-50>=50)
{
this.xPos-=50;
this.robot.style.left = this.xPos+"px";
}
}
}
else if(command_input=="TRA LEF")
{
if(this.xPos-50>=50)
{
this.xPos-=50;
this.robot.style.left = this.xPos+"px";
}
}
else if(command_input=="TRA TOP")
{
if(this.yPos-50>=50)
{
this.yPos-=50;
this.robot.style.top = this.yPos+"px";
}
}
else if(command_input=="TRA RIG")
{
if(this.xPos+50<=550)
{
this.xPos+=50;
this.robot.style.top = this.xPos+"px";
}
}
else if(command_input=="TRA BOT")
{
if(this.yPos+50<=550)
{
this.yPos+=50;
this.robot.style.top = this.yPos+"px";
}
}
else if(command_input=="MOV LEF")
{
if(this.xPos-50>=50)
{
this.xPos-=50;
this.robot.style.left = this.xPos+"px";
this.face=3;
this.deg = -90;
this.robot.style.transform="rotateZ(-90deg)"
// this.robot.style.transform = "rotateZ(" +-90 + "deg)";
}
}
else if(command_input=="MOV TOP")
{
if(this.yPos-50>=50)
{
this.yPos-=50;
this.robot.style.top = this.yPos+"px";
this.face=0;
this.deg = 0;
this.robot.style.transform="rotateZ(0deg)"
}
}
else if(command_input=="MOV RIG")
{
if(this.xPos+50<=550)
{
this.xPos+=50;
this.robot.style.top = this.xPos+"px";
this.face=1;
this.deg = 90;
this.robot.style.transform="rotateZ(90deg)"
}
}
else if(command_input=="MOV BOT")
{
if(this.yPos+50<=550)
{
this.yPos+=50;
this.robot.style.top = this.yPos+"px";
this.face=2;
this.deg = 180;
this.robot.style.transform="rotateZ(180deg)"
}
}
else{
alert("输入TUN LEF或TUN RIG或TUN BAG或不输入");
}
}
init(name){
this.robot.id=name;
document.body.appendChild(this.robot);
}
};
var robot = new RobotBox("robot-box");
robot.init("robot-box");
// cmd_btn.addEventListener("click",robot.go,false);
// t_left.addEventListener("click",robot.turnLeft,false);
// t_right.addEventListener("click",robot.turnRight,false);
// t_back.addEventListener("click",robot.turnBack,false);
//上面这种写法，会把RoboxBox的turnLeft作为t_left的触发事件,但触发该事件的是t_left
//相当于t_left.robot.turnLeft(),所以this指向t_left
//所以调用时t_left的this指向t_left,所以会疯狂报错
//两种解决方法，一种像下面，写成function然后robot.turnLeft()这样turnLeft的this指向robot
//第二种，RobotBox里的函数改成箭头函数写法()=>{}这样函数里的this永远指向RobotBox
cmd_btn.addEventListener("click",function(){robot.go();},false);
t_left.addEventListener("click",function(){robot.turnLeft();},false);
t_right.addEventListener("click",function(){robot.turnRight();},false);
t_back.addEventListener("click",function(){robot.turnBack();},false);
</script>
</body>
</html>