前端巧技 | 有点复杂的穿梭框

FannieGirl 2021-06-19 11:32:55
前端 复杂 有点 穿梭


image.png

前言

项目背景:VUE + 基于elementUI 的 Transfer 组件.

实现功能

  1. 穿梭框 增加按钮
  2. 穿梭框 编辑字段
  3. 穿梭框 输入框自动获取焦点
  4. 穿梭框 回车确认修改内容
  5. 穿梭框 失焦提示未提交内容

image.png

1. 穿梭框增加按钮

elementUITransfer 组件,UI是不分左右的。需求是只有穿梭到右边的字段才有编辑的操作。找遍天也没有看到有slot,或者暴露区分左右的钩子。大胆的说 【render-content 自定义数据项渲染函数】是不满足的。

解决思路

利用穿梭框已穿梭字段数组,在HTML元素写一个v-if。控制这个按钮的隐藏与显示。

<el-transfer
filterable
:titles="transferTitles"
:filter-method="filterMethod"
v-model="selectSourceFileArr"
:data="sourceFileData"
@change="handleChangeFileTransfer"
class="field-transfer"
>
<span
v-if="selectSourceFileArr.includes(option.key)" // 关键代码!!!!
class="el-icon-edit field-transfer__icon"
></span>
</el-transfer>
运行效果

image.png

2. 穿梭框编辑字段

增加了按钮只是一个开关,需求是点击小图标可以修改字段名称。用户可以输入,那就是input标签。这个小图标控制input的显示与隐藏

解决方案

小图标绑定点击事件 @click.stop.prevent="rename(option)"这里一定要注意阻止冒泡噢,不然你可能永远也触发不了这个事件。v-show="option.showInput" 这个字段后端是不会提供的,需要在接口数据回来自己forEach加上去切记哦~~~

 filterable
:titles="transferTitles"
:filter-method="filterMethod"
v-model="selectSourceFileArr"
:data="sourceFileData"
@change="handleChangeFileTransfer"
class="field-transfer"
>
<span>
<span v-show="!option.showInput"> {{ option.label }}</span>
<span v-show="option.showInput" class="field-transfer__input"> // 控制是否显示input
<el-input v-model="option.label"></el-input>
<i class="el-icon-close" @click.stop.prevent="closeInput(option)"></i> // 取消修改内容
<i class="el-icon-check" @click.stop.prevent="checkInput(option)"></i>// 保存修改内容
</span>
<span
v-if="selectSourceFileArr.includes(option.key)"
@click.stop.prevent="rename(option)" // 关键代码!!!!!!!!
class="el-icon-edit field-transfer__icon"
></span>
</span>
</el-transfer>
运行效果

image.png

3. 穿梭框 输入框自动获取焦点

需求是点击小图标,显示input,但是它的焦点是不在这个输入框上面的。

解决方案

自动获取焦点少不了focus(),input是循环渲染出来的,不可直接写ref,那就用赋值变量好啦~<el-input :ref='option.id'></el-input>。上面点击小图标不是有一个@click.stop.prevent="rename(option)"直接写在rename方法里面就行。效果就不放了,亲测有效!

//将输入框自动获取焦点
option 为入参
this.$nextTick(() => {
this.$refs[option.id].focus()
})

4. 回车确认修改内容

单独把这个回车事件都拿出来写,是不是有点?

  1. input + vue 监听回车事件 @keyup.13/@keyup.enter
  2. el-input + vue 监听回车事件 @keyup.13.native/@keyup.enter.native

5.穿梭框 失焦提示未提交内容

这个拿出写,我承认是有点那啥了,但是我的穿梭框就是有这玩意。又回车又失焦又。。。
就一个@blur打扰了,呜呜呜呜

image.png

芳妮酱总结

这几个方法其实不仅仅用在穿梭框上,虽然挺简单的,但有时候一时没有想到也挺闹心的。比如第一个如何在已有的穿梭框上多加一个小icon,而且只有右边有。一不留神el-input上面写@keyup.enter 没有写 .native。都是一些非常细节的小问题,你看一遍下一回就留意了!

版权声明
本文为[FannieGirl]所创,转载请带上原文链接,感谢
https://www.cnblogs.com/ifannie/p/14876404.html

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