表盘

date对象

今天主要学习了日期对象，然后简单做了一个钟表的小demo

+

new date() :创建日期

getDate(); 获得日期(月份中的某一天)

getDay(); 获得星期几

getFullYear(); 获得年份

getMonth(); 获得月份 0~11 0表示1月 11表示12月

getHours(); 获得小时

getMinutes(); 获得本地分钟

getSeconds(); 获得本地秒

getTime(); 获得毫秒： 1970年1月1号 0晨至今的毫秒数

demo

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html

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<body>
 	<div class="box">
 		<div class="circle">
 			<span class="a"></span>
 			<span class="b"></span>
 			<span class="c"></span>
 			<div class="fz">
 				<div>12</div>
 				<div>9</div>
 				<div>3</div>
 				<div>6</div>
 			</div>
 			<div class="fz-1">
 				<div>1</div>
 				<div>4</div>
 				<div>7</div>
 				<div>10</div>
 			</div>
 			<div class="fz-2">
 				<div>2</div>
 				<div>5</div>
 				<div>8</div>
 				<div>11</div>
 			</div>
 		</div>
 	</div>
</body>

css

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<style type="">
	*{
		margin:0;
		padding:0;
	}
	.box{
		width:400px;
		height:400px;
		border-radius:10px;
		background:black;
		margin:30px auto;
	}
	.circle{
		width:300px;
		height:300px;
		border-radius:50%;
		border:1px pink solid;
		background:snow;
		margin:0px auto;
		position:relative;
		top:50px;
	}
	.a{
		width:5px;
		height:75px;
		position:absolute;
		top:75px;
		left:150px;
		background:black;
		transform-origin:2.5px 65px;
	}
	.b{
		width:3px;
		height:100px;
		position:absolute;
		top:50px;
		left:151px;
		background:gray;
		transform-origin:1.5px 90px;
	}
	.c{
		width:2px;
		height:130px;
		position:absolute;
		top:20px;
		left:151.5px;
		background:red;
		transform-origin:1px 120px;
	}
	.fz,.fz-1,.fz-2{
		width:210px;
		height:210px;
		font-size:20px;
	}
	.fz{
		position:absolute;
		top:45px;
		left:45px;
		transform:rotateZ(45deg);
	}
	.fz-1{
		position:absolute;
		top:45px;
		left:45px;
		transform:rotateZ(75deg);
	}
	.fz-2{
		position:absolute;
		top:45px;
		left:45px;
		transform:rotateZ(105deg);
	}
	.fz>div,.fz-1 >div,.fz-2 >div{
		width:16px;
		position:absolute;
	}
	.fz div:nth-child(1){
		left:0;
		top:0;
		transform:rotateZ(-45deg);
	}
	.fz div:nth-child(2){
		width:16px;
		position:absolute;
		left:0;
		bottom:0;
		transform:rotateZ(-45deg);
	}
	.fz div:nth-child(3){
		width:16px;
		position:absolute;
		right:0;
		top:0;
		transform:rotateZ(-45deg);
	}
	.fz div:nth-child(4){
		width:16px;
		position:absolute;
		right:0;
		bottom:0;
		transform:rotateZ(-45deg);
	}
	.fz-1 div:nth-child(1){
		left:0;
		top:0;
		transform:rotateZ(-75deg);
	} 
	.fz-1 div:nth-child(2){
		right:0;
		top:0;
		transform:rotateZ(-75deg);
	}
	.fz-1 div:nth-child(3){
		right:0;
		bottom:0;
		transform:rotateZ(-75deg);
	}
	.fz-1 div:nth-child(4){
		left:0;
		bottom:0;
		transform:rotateZ(-75deg);
	}
	.fz-2 div:nth-child(1){
		left:0;
		top:0;
		transform:rotateZ(-105deg);
	} 
	.fz-2 div:nth-child(2){
		right:0;
		top:0;
		transform:rotateZ(-105deg);
	}
	.fz-2 div:nth-child(3){
		right:0;
		bottom:0;
		transform:rotateZ(-105deg);
	}
	.fz-2 div:nth-child(4){
		left:0;
		bottom:0;
		transform:rotateZ(-105deg);
	}
</style>

js

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<script type="">
		var timer=null;
		timer =setInterval(function(){
			var riQi = new Date();
		 	var hours =riQi.getHours();
		 	var minutes =riQi.getMinutes();
		 	var seconds =riQi.getSeconds();
		 	var hou =document.querySelector(".a");
		 	var minu =document.querySelector(".b");
		 	var seco =document.querySelector(".c");
		 	seco.style.transform = "rotateZ("+(seconds*6)+"deg)";
		 	minu.style.transform = "rotateZ("+(minutes*6 +seconds*0.1)+"deg)";
		 	hou.style.transform = "rotateZ("+(hours*30+minutes*0.5+seconds/120)+"deg)";
		},1000);
		
	</script>