snapSpeed: 400,
// click:true
})
// 监听滚动结束时间获取pageX
this.slider.on('scrollEnd', () => {
let pageIndex = this.slider.getCurrentPage().pageX
if (this.loop) {
// 由于bscroll循环播放首尾各加一个,因此索引-1
pageIndex -= 1
}
this.currentPageIndex = pageIndex
if (this.autoPlay) {
this._play()
}
})
this.slider.on('beforeScrollStart', () => {
if (this.autoPlay) {
clearTimeout(this.timer)
}
})
},
_initDots() {
// 长度为n的空数组
this.dots = new Array(this.children.length)
},
_play() {
// currentPageIndex为不含首尾副本的索引，因此若有循环要+2
let pageIndex = this.currentPageIndex + 1
if (this.loop) {
pageIndex += 1
}
this.timer = setTimeout(() => {
this.slider.goToPage(pageIndex, 0, 400)
}, this.interval)
}
},
// 生命周期destroyed销毁清除定时器，有利于内存释放
destroyed() {
clearTimeout(this.timer)
},
}
</script>
<style scoped>
.slider{
min-height: 1px;
position: relative;
}
.slider-group{
position: relative;
overflow: hidden;
white-space: nowrap;
}
.slider-item{
float: left;
box-sizing: border-box;
overflow: hidden;
text-align: center;
height: 150px;
overflow: hidden;
}
.slider-item a{
display: block;
width: 100%;
overflow: hidden;
text-decoration: none;
}
.slider-item img{
display: block;
width: 100%;
}
.dots{
position: absolute;
right: 0;
left: 0;
bottom: 12px;
text-align: center;
font-size: 0;
}
.dot{
display: inline-block;
margin: 0 4px;
width: 8px;
height: 8px;
border-radius: 50%;
background: red;
}
.active{
width: 20px;
border-radius: 5px;
}
</style>
该代码引用common/js/dom.js中的addClass()方法为每个轮播图添加一个slider-item类，dom.js代码如下：
export function hasClass (el, className) {
// 开始或空白字符+类名+空白字符或结束
let reg = new RegExp('(^|s)' + className + '(s|$)')
// 测试元素是否有该类名，返回布尔值
return reg.test(el.className)
}export function addClass (el, className) {
if (hasClass(el, className)) {
return
}
// 以空白符为切割位置切割生成新数组
let newClass = el.className.split(' ')
// 数组中加入新类名
newClass.push(className)
// 将数组元素放入一个字符串，以空白符间隔
el.className = newClass.join(' ')
}
scroll.vue代码
