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| <template>
<div class="ix">
{{pageData}}
<div class="picker-bg" ref="bg" @touchstart="pStart" @touchmove="pMove" @touchend="pEnd">
<div class="select-ac"></div>
<div class="picker" ref="test">
<div class="box" ref="box">
<div v-for="(item,index) in picData.data" :id="'a' + index" :ref="'a' + index" :key="index"
@click="cIndex(index)">{{item}}
</div>
</div>
</div>
</div>
</div>
</template>
<script>
export default {
name: 'picker',
data: function () {
return {
picData: {
default: '1',
data: ['1', '2', '3', '4', '5', '6', '7', '1', '2', '3', '4', '5', '6', '7']
},
pageData: {
start: '',
end: '',
move: ''
}
}
},
created: function () {
}, // 创建时
beforeMount: function () {}, // 挂载之前
mounted: function () {}, // 挂载之后
beforeUpdate: function () {}, // 数据更新时调用,在渲染之前
updated: function () {}, // 数据更新后,渲染后调用(禁止)
beforeDestroy: function () {}, // 实例销毁前调用,解绑中间层的数据传输
destroyed: function () {}, // 实例销毁后调用
methods: {
cIndex (i) {
console.log('--i--', i)
},
pMove (e) {
// 获取当前位置
let newHeight = this.$refs.box.style.transform.split('px,')[1] || 0
// 获取上一次的位置
let oldHeight = this.pageData.start
// 计算活动距离
this.pageData.move = e.targetTouches[0].pageY
let tempHeight = e.targetTouches[0].pageY - this.pageData.start
let endHeight = Number(newHeight) + Number(tempHeight * 1.5)
console.log('--e--', newHeight, oldHeight, tempHeight, endHeight)
this.pageData.start = e.targetTouches[0].pageY
this.$refs.box.style.transform = `translate3d(0px, ${endHeight}px, 0px)`
e.preventDefault()
},
pEnd () {
// 当前transform
let oldHeight = this.$refs.box.style.transform.split('px,')[1] || 0
this.pageData.end = oldHeight
// options 高度,数量
let tempHeight = document.querySelectorAll('.picker .box div')[0].offsetHeight
let tempNumber = document.querySelectorAll('.picker .box div').length - 1
let index = Math.round(oldHeight / tempHeight)
console.log('--end--', index, tempNumber, tempHeight, this.picData.data.length)
if (index < -tempNumber) {
index = -tempNumber
}
if (index > 0) {
index = 0
}
this.$refs.box.style.transform = `translate3d(0px, ${index * 60}px, 0px)`
},
pStart (e) {
this.pageData.start = e.targetTouches[0].pageY
console.log('--start--', this.pageData.start)
}
} // 函数
}
</script>
<style lang='scss'>
.ix {
position: fixed;
width: 100vw;
bottom: 0;
z-index: 5;
}
$height: 60px;
.picker-bg {
display: block;
position: relative;
height: 5 * $height;
overflow: hidden;
width: 100%;
}
$acBg: rgba(86, 86, 86, 0.2);
$conBg: rgba(252, 252, 252, 0.70);
.select-ac {
width: 100%;
height: $height;
user-select: none;
background-color: $acBg;
position: absolute;
left: 0;
z-index: 3;
top: 2 * $height;
pointer-events: none;
&::after, &::before {
content: "";
display: block;
position: absolute;
background-color: $conBg;
width: 100%;
height: 500%;
pointer-events: auto;
}
&::before {
bottom: $height;
}
&::after {
top: $height;
}
}
.picker {
box-sizing: border-box;
position: relative;
/*overflow-y: auto;*/
&::-webkit-scrollbar {
width: 0;
}
.box {
user-select: none;
transition: all 0.4s;
display: flex;
flex-direction: column;
justify-content: center;
padding-top: 2 * $height;
padding-bottom: 2 * $height;
div {
user-select: none;
height: $height;
line-height: $height;
text-align: center;
font-size: 18px;
}
}
}
</style>
|
