vue实现移动端可拖拽浮球，供大家参考，具体内容如下
1 首先创建一个div
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<div class="floatball" id="floatball" @mousedown="down" @touchstart.stop="down" @mousemove="move" @touchmove.stop="move" @mouseup="end" @touchend.stop="end" @click="showRewardDesc" :style="{top:position.y+'px', left:position.x+'px'}"> 奖励规则</div> |
2 给 div 附上样式
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<style> .floatball{ color:white; height:50px; width: 50px; padding: 5px; z-index: 990; position: fixed; top: 60px; right: 320px; border-radius: 50%; background-color: rgba(29, 157, 237,0.8); }</style> |
3 给 div 附上事件
准备四个变量
1）、屏幕长
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var screenHeight = window.screen.height |
2）、屏幕宽
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var screenWidth = window.screen.width |
3）、初始触控点 距离 div 左上角的横向距离 dx
4）、初始触控点 距离 div 左上角的竖向距离 dy
在开始拖拽时，计算出鼠标点（初始触控点）和 div左上角顶点的距离
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down(event){ this.flags = true; var touch ; if(event.touches){ touch = event.touches[0]; }else { touch = event; } console.log('鼠标点所在位置', touch.clientX,touch.clientY) console.log('div左上角位置', event.target.offsetTop,event.target.offsetLeft) dx = touch.clientX - event.target.offsetLeft dy = touch.clientY - event.target.offsetTop}, |
拖拽进行时，将触控点的位置赋值给 div
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// 定位滑块的位置this.position.x = touch.clientX - dx;this.position.y = touch.clientY - dy; |
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// 限制滑块超出页面// console.log('屏幕大小', screenWidth, screenHeight)if (this.position.x < 0) { this.position.x = 0} else if (this.position.x > screenWidth - touch.target.clientWidth) { this.position.x = screenWidth - touch.target.clientWidth}if (this.position.y < 0) { this.position.y = 0} else if (this.position.y > screenHeight - touch.target.clientHeight) { this.position.y = screenHeight - touch.target.clientHeight} |
拖拽结束
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//鼠标释放时候的函数end(){ console.log('end') this.flags = false;}, |
全部代码
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<template> <div class="floatball" id="floatball" @mousedown="down" @touchstart.stop="down" @mousemove="move" @touchmove.stop="move" @mouseup="end" @touchend.stop="end" :style="{top:position.y+'px', left:position.x+'px'}"> 奖励规则 </div></template><script>// 鼠标位置和div的左上角位置 差值var dx,dyvar screenWidth = window.screen.widthvar screenHeight = window.screen.heightexport default { data() { return { flags: false, position: { x: 320, y: 60 }, } }, methods: { // 实现移动端拖拽 down(event){ this.flags = true; var touch ; if(event.touches){ touch = event.touches[0]; }else { touch = event; } console.log('鼠标点所在位置', touch.clientX,touch.clientY) console.log('div左上角位置', event.target.offsetTop,event.target.offsetLeft) dx = touch.clientX - event.target.offsetLeft dy = touch.clientY - event.target.offsetTop }, move() { if (this.flags) { var touch ; if (event.touches) { touch = event.touches[0]; } else { touch = event; } // 定位滑块的位置 this.position.x = touch.clientX - dx; this.position.y = touch.clientY - dy; // 限制滑块超出页面 // console.log('屏幕大小', screenWidth, screenHeight ) if (this.position.x < 0) { this.position.x = 0 } else if (this.position.x > screenWidth - touch.target.clientWidth) { this.position.x = screenWidth - touch.target.clientWidth } if (this.position.y < 0) { this.position.y = 0 } else if (this.position.y > screenHeight - touch.target.clientHeight) { this.position.y = screenHeight - touch.target.clientHeight } //阻止页面的滑动默认事件 document.addEventListener("touchmove",function(){ event.preventDefault(); },false); } }, //鼠标释放时候的函数 end(){ console.log('end') this.flags = false; }, } }</script><style> .floatball{ color:white; height:50px; width: 50px; padding: 5px; z-index: 990; position: fixed; top: 60px; right: 320px; border-radius: 50%; background-color: rgba(29, 157, 237,0.8); }</style> |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/meteorsshower2013/article/details/102958260
