javascript - 使用vue做个抽奖问题
本文介绍了javascript - 使用vue做个抽奖问题的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
问 题
代码：
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="//cdn.bootcss.com/vue/2.3.4/vue.min.js"></script>
<style>
* {
margin: 0;
padding: 0;
}
#app ul li {
width: 100px;
height: 100px;
box-sizing: border-box;
background: #ccc;
float: left;
}
#app ul li.active {
border: 3px solid red;
}
</style>
</head>
<body>
<div id="app">
<ul>
<li v-for="(item, index) of items" :class="{active: index == actvieIndex}">{{ item.name }}</li>
</ul>
</div>
<script>
var app = new Vue({
el: '#app',
data () {
return {
actvieIndex: 0,
items: [
{name: '1'},
{name: '2'},
{name: '3'},
{name: '4'},
{name: '5'}, // 这些都假设是一些用户名字
{name: '6'},
{name: '7'},
{name: '8'},
{name: '9'},
{name: '10'},
{name: '11'},
{name: '12'},
{name: '13'},
{name: '14'},
{name: '15'},
{name: '16'},
{name: '17'},
]
}
},
mounted () {
setInterval(() => {
this.actvieIndex++;
if(this.actvieIndex >= this.items.length ) this.actvieIndex = 0;
}, 50);
}
})
</script>
</body>
</html>比如10秒就要停止显示， 快到10秒了，就应该慢慢的停止。 这样用户才会有那种激动感。
相信大家都玩过转盘，就跟那个类似。 但是不知道怎么做。
解决方案
简单的做了一个 demo。
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title></title>
<script src="//cdn.bootcss.com/vue/2.3.4/vue.min.js"></script>
<style>
* {
margin: 0;
padding: 0;
}
#app ul li {
width: 100px;
height: 100px;
box-sizing: border-box;
background: #ccc;
float: left;
}
#app ul li.active {
border: 3px solid red;
}
</style>
</head>
<body>
<div id="app">
<ul>
<li v-for="(item, index) of items" :class="{active: index == actvieIndex}">{{ item.name }}</li>
</ul>
</div>
<script>
var app = new Vue({
el: '#app',
data () {
return {
actvieIndex: 0,
i: 0,
count: 0,
items: [
{name: '1'},
{name: '2'},
{name: '3'},
{name: '4'},
{name: '5'}, // 这些都假设是一些用户名字
{name: '6'},
{name: '7'},
{name: '8'},
{name: '9'},
{name: '10'},
{name: '11'},
{name: '12'},
{name: '13'},
{name: '14'},
{name: '15'},
{name: '16'},
{name: '17'},
]
}
},
methods: {
go(seconds) {
const SECONDS = seconds * 1000;
const HALF_SECONDS = SECONDS / 2;
const FREQUENCY = 50;
setTimeout(() => {
console.log(this.count)
this.actvieIndex++;
if(this.actvieIndex >= this.items.length ) this.actvieIndex = 0;
if (this.count >= HALF_SECONDS) {
this.i+= 10;
this.count += 50 + this.i;
} else {
this.count += 50;
}
if (this.count <= SECONDS) {
this.go(seconds)
}
}, FREQUENCY + this.i);
}
},
mounted () {
this.go(5)
}
})
</script>
</body>
</html>这篇关于javascript - 使用vue做个抽奖问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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