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udiwms-vue-frame/src/views/test.vue

59 lines
1.5 KiB
Vue

<template>
<div>
12354
</div>
</template>
<script>
export default {
data() {
return {
}
},
mounted() {
// 监听按键
var code = ''
var lastTime, nextTime // 上次时间、最新时间
var lastCode, nextCode // 上次按键、最新按键
document.onkeypress = (e) => {
debugger
// 获取按键
if (window.event) { // IE
nextCode = e.keyCode
} else if (e.which) { // Netscape/Firefox/Opera
nextCode = e.which
}
// 如果触发了回车事件(扫码结束时间)
if (nextCode === 13) {
if (code.length < 3) return // 手动输入的时间不会让code的长度大于2所以这里只会对扫码枪有
this.codeFind(code) // 获取到扫码枪输入的内容,做别的操作
code = ''
lastCode = ''
lastTime = ''
return
}
nextTime = new Date().getTime() // 记录最新时间
if (!lastTime && !lastCode) { // 如果上次时间和上次按键为空
code += e.key // 执行叠加操作
}
// 如果有上次时间及上次按键
if (lastCode && lastTime && nextTime - lastTime > 30) { // 当扫码前有keypress事件时,防止首字缺失
code = e.key
} else if (lastCode && lastTime) {
code += e.key
}
lastCode = nextCode
lastTime = nextTime
}
},
methods: {
// 业务逻辑根据项目更改
codeFind(code) {
alert(code)
}
}
}
</script>