<el-form-item label="维修记录:" prop="textarea"> <el-input v-model="ruleForm.textarea" placeholder="维修记录"/> </el-form-item>

这是一个基于 Element UI 的表单组件，用于输入维修记录。其中，`label` 属性表示表单项的标签文本，`prop` 属性表示该表单项与表单数据对象中的哪个属性绑定，`v-model` 指令则将表单项的值与 `ruleForm.textarea` 属性进行双向数据绑定。

在这个表单项中，使用了 `el-input` 组件来实现输入框，并设置了 `placeholder` 属性来提供输入提示。

相关问题

<main-content :ifDetail="true"> <div class="two-side"> <div class="main-left"> <el-form :model="form" :rules="rules" ref="form" label-width="120px"> <el-form-item label="选择下载模块" prop="accountName"> <el-input v-model.trim="form.accountName" :maxlength="50"></el-input> </el-form-item> <el-form-item label="倾斜度"> <el-slider v-model.number="form.rotate" :min="-180" :max="180"></el-slider> </el-form-item> <el-form-item label="文字"> <el-input type="textarea" v-model="form.text"></el-input> </el-form-item> <el-form-item label="文字大小"> <el-input-number v-model.number="form.fontSize" :min="10" :max="50"></el-input-number> px </el-form-item> <el-form-item label="位置"> <el-select placeholder="请选择位置" v-model="form.alignment"> <el-option v-for="item in options" :key="item.value" :label="item.label" :value="item.value"></el-option> </el-select> </el-form-item> <el-form-item> <el-select v-if="form.alignment === 2" placeholder="请选择位置" v-model="form.textPosition"> <el-option v-for="item in textPositionOptions" :key="item.value" :label="item.label" :value="item.value" ></el-option> </el-select> </el-form-item> </el-form> {{ watermarkStyle }} </div> <div class="main-right" id="show"> <div class="watermark"> <span :style="watermarkStyle" ref="showText" style="word-break:break-all;display: inline-block">{{ form.text }}</span> </div> </div> </div> </main-content> 左边来控制右边div里水印展示，代码怎么写

您可以在 `<el-form>` 标签上绑定 `@input` 事件，当表单数据发生改变时，触发该事件，然后在事件处理函数中计算出水印的样式，并将样式绑定到 `<span>` 标签上。具体实现代码如下：

<template>
  <main-content :ifDetail="true">
    <div class="two-side">
      <div class="main-left">
        <el-form :model="form" :rules="rules" ref="form" label-width="120px" @input="handleInput">
          <!-- 表单项省略 -->
        </el-form>
      </div>
      <div class="main-right" id="show">
        <div class="watermark">
          <span :style="watermarkStyle" ref="showText" style="word-break:break-all;display: inline-block">{{ form.text }}</span>
        </div>
      </div>
    </div>
  </main-content>
</template>

<script>
export default {
  data() {
    return {
      form: {
        accountName: '',
        rotate: 0,
        text: '',
        fontSize: 16,
        alignment: 1,
        textPosition: 1
      },
      options: [
        { label: '左上', value: 1 },
        { label: '居中', value: 2 },
        { label: '右下', value: 3 }
      ],
      textPositionOptions: [
        { label: '正常', value: 1 },
        { label: '斜体', value: 2 }
      ]
    }
  },
  computed: {
    watermarkStyle() {
      const { rotate, fontSize, alignment, textPosition } = this.form
      const deg = rotate + (textPosition === 2 ? -45 : 0)
      const translateX =
        alignment === 1 ? '-10%' : alignment === 2 ? '-50%' : '90%'
      const translateY =
        alignment === 1 ? '-10%' : alignment === 2 ? '-50%' : '90%'
      const transform = `rotate(${deg}deg)`
      const style = {
        position: 'absolute',
        top: 0,
        left: 0,
        bottom: 0,
        right: 0,
        fontSize: `${fontSize}px`,
        transform: transform,
        '-webkit-transform': transform,
        '-ms-transform': transform,
        '-moz-transform': transform,
        '-o-transform': transform,
        opacity: '0.2',
        'pointer-events': 'none',
        'text-align': 'center',
        'z-index': 9999,
        transformOrigin: '50% 50%',
        '-webkit-transform-origin': '50% 50%',
        '-ms-transform-origin': '50% 50%',
        '-moz-transform-origin': '50% 50%',
        '-o-transform-origin': '50% 50%',
        color: '#000',
        'word-break': 'break-all',
        'white-space': 'pre-wrap',
        'max-height': '100%',
        'max-width': '100%',
        overflow: 'hidden',
        'text-overflow': 'ellipsis',
        '-webkit-text-fill-color': 'transparent',
        '-webkit-background-clip': 'text',
        'background-clip': 'text',
        '-webkit-user-select': 'none',
        '-moz-user-select': 'none',
        '-ms-user-select': 'none',
        userSelect: 'none',
        '-webkit-line-clamp': '1',
        display: 'flex',
        'align-items': 'center',
        'justify-content': 'center',
        'transform-style': 'preserve-3d'
      }
      if (textPosition === 2) {
        style.padding = '0.5rem'
        style.background =
          'linear-gradient(to right bottom, rgba(255, 255, 255, 0.2) 0%, rgba(255, 255, 255, 0.2) 45%, rgba(255, 255, 255, 0) 50%, rgba(255, 255, 255, 0.2) 55%, rgba(255, 255, 255, 0.2) 100%)'
      }
      style.transform += ` translate(${translateX}, ${translateY})`
      style['-webkit-transform'] += ` translate(${translateX}, ${translateY})`
      style['-moz-transform'] += ` translate(${translateX}, ${translateY})`
      style['-ms-transform'] += ` translate(${translateX}, ${translateY})`
      style['-o-transform'] += ` translate(${translateX}, ${translateY})`
      return style
    }
  },
  methods: {
    handleInput() {
      this.$nextTick(() => {
        const { width, height } = this.$refs.show.getBoundingClientRect()
        const { offsetWidth, offsetHeight } = this.$refs.showText
        if (width === 0 || height === 0 || offsetWidth === 0 || offsetHeight === 0) {
          return
        }
        const scaleX = width / offsetWidth
        const scaleY = height / offsetHeight
        const scale = Math.min(scaleX, scaleY)
        this.$refs.showText.style.transform += `scale(${scale})`
        this.$refs.showText.style['-webkit-transform'] += `scale(${scale})`
        this.$refs.showText.style['-moz-transform'] += `scale(${scale})`
        this.$refs.showText.style['-ms-transform'] += `scale(${scale})`
        this.$refs.showText.style['-o-transform'] += `scale(${scale})`
      })
    }
  }
}
</script>

代码中的 `watermarkStyle` 计算属性用于计算水印的样式，`handleInput` 方法用于在计算出水印样式后，将水印按照比例缩小并居中显示。注意，为了保证水印样式的正确性，需要在表单项加载完成之后计算水印样式，因此需要在 `handleInput` 方法中使用 `$nextTick` 方法等待表单项加载完成再进行计算。

<view style="padding-top:20rpx 10rpx 20rpx 10rpx"> <u--form labelPosition="left" labelAlig :model="model" ref="form" labelWidth="140rpx" :rules='rules'> <u-form-item label="特种车辆" prop="specialVehicle" ref="item1"> <u-switch v-model="model.specialVehicle" active-value="1" inactive-value="0"></u-switch> </u-form-item> <u-form-item label="车辆牌照" prop="vehicleCode" ref="item1"> <u--input v-model="model.vehicleCode" placeholder="请输入" size="small"></u--input> </u-form-item> <u-form-item label="客户名称" prop="customerName" ref="item1"> <u--input v-model="model.customerName" placeholder="请输入"></u--input> </u-form-item> <u-form-item label="送修人:" prop="senderRepairUserName" ref="item1"> <u--input v-model="model.senderRepairUserName" placeholder="请输入"></u--input> </u-form-item> <u-form-item label="联系电话" prop="customerCorporationPhone" ref="item1"> <u--input v-model="model.customerCorporationPhone" placeholder="请输入"></u--input> </u-form-item> <u-form-item label="报修地址" prop="repairAddress" ref="item1"> <!-- <u--address v-model="model.repairAddress" @select="" /> --> </u-form-item> <u-form-item label="故障描述" prop="faultDesc" ref="item1"> <u--textarea v-model="model.faultDesc" placeholder="请输入"></u--textarea> </u-form-item> </u--form> </view> uniapp 如何修改表单输入框高度，标签字体大小

要UniApp中表单输入框的高度和标签字体大小，你可以使用样式属性来实现。以下是示例代码：

<template>
  <view style="padding-top: 20rpx 10rpx 20rpx 10rpx">
    <u-form label-position="left" label-align :model="model" ref="form" label-width="140rpx" :rules="rules">
      <u-form-item label="特种车辆" prop="specialVehicle" ref="item1">
        <u-switch v-model="model.specialVehicle" active-value="1" inactive-value="0"></u-switch>
      </u-form-item>
      <u-form-item label="车辆牌照" prop="vehicleCode" ref="item1">
        <u-input v-model="model.vehicleCode" placeholder="请输入" size="small"></u-input>
      </u-form-item>
      <u-form-item label="客户名称" prop="customerName" ref="item1">
        <u-input v-model="model.customerName" placeholder="请输入"></u-input>
      </u-form-item>
      <u-form-item label="送修人:" prop="senderRepairUserName" ref="item1">
        <u-input v-model="model.senderRepairUserName" placeholder="请输入"></u-input>
      </u-form-item>
      <u-form-item label="联系电话" prop="customerCorporationPhone" ref="item1">
        <u-input v-model="model.customerCorporationPhone" placeholder="请输入"></u-input>
      </u-form-item>
      <u-form-item label="报修地址" prop="repairAddress" ref="item1">
        <!-- <u-address v-model="model.repairAddress" @select="" /> -->
      </u-form-item>
      <u-form-item label="故障描述" prop="faultDesc" ref="item1">
        <u-textarea v-model="model.faultDesc" placeholder="请输入"></u-textarea>
      </u-form-item>
    </u-form>
  </view>
</template>

<style>
/* 修改输入框高度 */
.u-input {
  height: 60rpx;
}

/* 修改标签字体大小 */
.u-form-item__label {
  font-size: 28rpx;
}
</style>

在上述代码中，使用`.u-input`选择器来修改输入框的高度，可以根据需要调整 `height` 的数值。使用`.u-form-item__label`选择器来修改标签的字体大小，可以根据需要调整 `font-size` 的数值。

请注意，这只是一个示例代码，你需要根据你的实际情况进行相应的调整。