还是直接上代码
<template>
<div class="main">
<div ref="move_div" @touchstart="down" @touchmove="move" @touchend="end" :style="{top: top + 'px', left: left + 'px'}" class="drag_area"></div>
</div>
</template>
export default {
name: 'drag',
data () {
return {
flags: false,
position: {x: 0, y: 0, left: 0, top: 0},
top: 0,
left: 0,
width: window.innerWidth || document.documentElement.clientWidth || document.body.clientWidth,
height: window.innerHeight || document.documentElement.clientHeight || document.body.clientHeight
}
},
methods: {
down () { // 拖动开始的操作
this.flags = true
const refs = this.$refs.move_div.getBoundingClientRect()
let touch = event
if (event.touches) {
touch = event.touches[0]
}
this.position.x = touch.clientX
this.position.y = touch.clientY
this.position.left = refs.left
this.position.top = refs.top
},
move () { // 拖动中的操作
if (this.flags) {
let touch = event
if (event.touches) {
touch = event.touches[0]
}
const xPum = this.position.left + touch.clientX - this.position.x
const yPum = this.position.top + touch.clientY - this.position.y
this.left = xPum
this.top = yPum
this.banOut()
// 阻止页面的滑动默认事件
document.addEventListener('touchmove', function () {
event.preventDefault()
}, {passive: false})
}
},
end () { // 拖动结束的操作
this.flags = false
this.banOut()
},
banOut () { // 避免拖动出界的限制
const refs = this.$refs.move_div.getBoundingClientRect()
if (this.left < 0) {
this.left = 0
} else if (this.left > this.width - refs.width) {
this.left = this.width - refs.width
}
if (this.top < 0) {
this.top = 0
} else if (this.top > this.height - refs.height) {
this.top = this.height - refs.height
}
}
}
}
<style lang="scss" scoped>
.main{
background-color: brown;
height: -webkit-fill-available;
.drag_area{
width: 10vw;
height: 10vw;
background-color: dodgerblue;
position: absolute;
top: 0;
left: 0;
}
</style>
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