vue中如何实现在某一区域中多个元素随机定位显示且不重叠给出示例并判断不能重叠
时间: 2024-02-20 09:58:17 浏览: 186
在Vue中可以通过CSS样式和JavaScript代码实现多个元素随机定位且不重叠的效果。以下是一个示例:
1. HTML结构
```html
<template>
<div class="container">
<div v-for="(item, index) in items" :key="index" class="box">{{ item }}</div>
</div>
</template>
```
2. CSS样式
```css
.container {
position: relative;
width: 500px;
height: 500px;
background-color: #eee;
}
.box {
position: absolute;
width: 50px;
height: 50px;
background-color: #1abc9c;
color: #fff;
text-align: center;
line-height: 50px;
font-size: 16px;
}
```
3. JavaScript代码
```javascript
export default {
data() {
return {
items: ["A", "B", "C", "D", "E"],
positions: [],
};
},
mounted() {
this.randomPositions();
},
methods: {
randomPositions() {
const boxes = this.$el.querySelectorAll(".box");
const container = this.$el.querySelector(".container");
const containerRect = container.getBoundingClientRect();
const boxSize = boxes[0].getBoundingClientRect();
const boxWidth = boxSize.width;
const boxHeight = boxSize.height;
const maxLeft = containerRect.width - boxWidth;
const maxTop = containerRect.height - boxHeight;
for (let i = 0; i < boxes.length; i++) {
let left = this.randomNumber(0, maxLeft);
let top = this.randomNumber(0, maxTop);
let position = { left, top };
let isOverlap = this.checkOverlap(position, i);
while (isOverlap) {
left = this.randomNumber(0, maxLeft);
top = this.randomNumber(0, maxTop);
position = { left, top };
isOverlap = this.checkOverlap(position, i);
}
boxes[i].style.left = `${left}px`;
boxes[i].style.top = `${top}px`;
this.positions.push(position);
}
},
randomNumber(min, max) {
return Math.floor(Math.random() * (max - min + 1)) + min;
},
checkOverlap(position, currentIndex) {
for (let i = 0; i < currentIndex; i++) {
const prevPosition = this.positions[i];
const x1 = prevPosition.left;
const y1 = prevPosition.top;
const x2 = x1 + 50;
const y2 = y1 + 50;
const x3 = position.left;
const y3 = position.top;
const x4 = x3 + 50;
const y4 = y3 + 50;
if (!(x2 < x3 || x1 > x4 || y2 < y3 || y1 > y4)) {
return true;
}
}
return false;
},
},
};
```
在mounted生命周期钩子函数中,调用randomPositions方法,该方法会随机生成多个元素的位置,并通过checkOverlap方法来判断位置是否重叠。如果重叠,则重新生成位置,直到不重叠为止。最后将位置应用到元素上。
checkOverlap方法采用了矩形相交的方法来判断位置是否重叠。如果两个矩形不相交,则不重叠。
注意事项:
1. 生成的元素数量不宜过多,否则随机生成位置的时间会变长。
2. 容器的宽高需要固定,否则无法计算元素的位置。
3. 元素的宽高需要固定,否则无法计算元素的位置。
4. 不同的容器和元素宽高需要针对性地修改代码中的计算。
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