vue3+ts+uniapp实现小程序端input获取焦点计算上推页面距离

input获取焦点计算上推页面距离

• 1.先说我这边的需求
• 2.发现问题
• 3.解决思路
• 4.代码展示

1.先说我这边的需求

需求

2.发现问题

发现问题:

3.解决思路

直接上代码

4.代码展示

<script setup lang="ts">
import { getCurrentInstance, ref } from 'vue'
//  监听键盘高度变化
const keyboardHeight = ref(0)
// 当前键盘类型
const keyboardType = ref('')
// 下一步
const nextText = ref('下一步')
const isNext = ref(false)

const onInputFocus = (event: UniHelper.InputOnFocusEvent, type: string) => {
  // 获取键盘高度
  keyboardHeight.value = Math.ceil(event.detail.height || 0)
  keyboardType.value = type

  if (['wage', 'fund', 'socialSecurity'].includes(type)) {
    nextText.value = '确定'
  } else {
    nextText.value = '下一步'
  }
  handleKeyboardOpen(type)
  // 监听键盘高度发生变化时(来短信验证码)提高按钮
  uni.onKeyboardHeightChange((res) => {
    keyboardHeight.value = Math.ceil(res.height)
    handleKeyboardOpen(type)
  })
}

// 失去焦点触发
const onInputBlur: UniHelper.InputOnBlur = () => {
  if (isNext.value) return (isNext.value = false)
   // 移除监听事件
  uni.offKeyboardHeightChange()
  keyboardHeight.value = 0
  keyboardType.value = ''
}
// 下一步触发
const onNextConfirm = (event: UniHelper.CustomEvent, type: string) => {
  isNext.value = true
  event.stopPropagation()
  if (type === 'name') {
    idCardInput.value = true
  } else if (type === 'idCard') {
    phoneInput.value = true
  } else if (['phone', 'wage', 'fund', 'socialSecurity'].includes(type)) {
    idCardInput.value = false
    phoneInput.value = false
    nameInput.value = false
    isNext.value = false
  }
}
// 主要逻辑相关!!!
//1、首先导入当前组件的实例 form 'vue'
var currentInstance = getCurrentInstance()
// 键盘弹出时计算推上去的距离
const handleKeyboardOpen = (type: string) => {
  // 使用 inputQuery 获取输入框 & 按钮位置
  //2、添加上in方法
  const inputQuery = uni.createSelectorQuery().in(currentInstance)
  const ButtonQuery = uni.createSelectorQuery().in(currentInstance)
  let rectBottom = 0
  let rectBottom2 = 0
  // 获取输入框
  inputQuery
    .select(`#${type}`)
    .boundingClientRect((rect: any) => {
      console.log(rect, 'rect')
      rectBottom = rect.bottom
    })
    .exec()
  // 获取按钮位置
  setTimeout(() => {
    ButtonQuery.select(`#next`)
      .boundingClientRect((rect: any) => {
        // rect 包含了按钮的位置信息
        rectBottom2 = rectBottom - rect.bottom
        // >0 证明 上推页面了 !=0 证明获取到按钮信息了
        if (rectBottom2 > 0 && rect.bottom !== 0) {
          keyboardHeight.value = keyboardHeight.value - rectBottom2
        }
      })
      .exec()
  })
}
</script>
<template>
 <input
  id="fund"
  class="input"
  focus
  type="digit"
  placeholder="请输入"
  placeholder-style="font-size:28rpx"
  v-model="formInfo.fundVal"
  @focus="onInputFocus($event, 'fund')"
  @blur="onInputBlur"
/>

<input
id="socialSecurity"
class="input"
type="digit"
focus
placeholder="请输入"
placeholder-style="font-size:28rpx"
v-model="formInfo.socialSecurityVal"
@focus="onInputFocus($event, 'socialSecurity')"
@blur="onInputBlur"
/>

<input
 id="wage"
  class="input"
  type="digit"
  placeholder="请输入签约工资"
  v-model="formBottomInfo.wage"
  @focus="onInputFocus($event, 'wage')"
  @blur="onInputBlur"
/>
 <!-- 下一步 -->
 <view
   id="next"
   class="nextKey"
   :style="{ bottom: keyboardHeight + 'px', display: keyboardHeight ? 'block' : 'none' }"
   @tap.stop="onNextConfirm($event, keyboardType)"
   >{{ nextText }}</view
 >
</template>

<style lang="scss" scoped>
  .nextKey {
    position: fixed;
    bottom: 0;
    right: 0;
    display: none;
    width: 140rpx;
    height: 80rpx;
    line-height: 80rpx;
    text-align: center;
    color: #fff;
    border-radius: 8rpx;
    font-size: 28rpx;
    background-color: #42b983;
  }
</style>

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