![](https://img.laitimes.com/img/_0nNw4CM6IyYiwiM6ICdiwiI0gTMx81dsQWZ4lmZf1GLlpXazVmcvwFciV2dsQXYtJ3bm9CX9s2RkBnVHFmb1clWvB3MaVnRtp1XlBXe0xCMy81dvRWYoNHLwEzX5xCMx8FesU2cfdGLwMzX0xiRGZkRGZ0Xy9GbvNGLpZTY1EmMZVDUSFTU4VFRR9Fd4VGdsYTMfVmepNHLrJXYtJXZ0F2dvwVZnFWbp1zczV2YvJHctM3cv1Ce-cGcq5yNzcTO0EGZ1EDZ3cjYhNzMzYzX1MzMwATM4IzLclDMyIDMy8CXn9Gbi9CXzV2Zh1WavwVbvNmLvR3YxUjLyM3Lc9CX6MHc0RHaiojIsJye.jpg)
要實作的功能:
完全和單輸入框一樣的操作,甚至可以插入覆寫:
1,限制輸入數字
2,正常輸入
3,backspace删除
4,paste任意位置粘貼輸入
5,光标選中一個數字,滾輪可以微調數字大小,限制0-9
6,123|456 自動覆寫光标後輸入的字元,此時光标在3後,繼續輸入111,會得到123111,而不用手動删除456
7,封裝成vue單檔案元件,友善任意調用。
最終效果如圖:
模闆代碼
<template>
<div class="input-box">
<div class="input-content" @keydown="keydown" @keyup="keyup" @paste="paste" @mousewheel="mousewheel"
@input="inputEvent">
<input max="9" min="0" maxlength="1" data-index="0" v-model.trim.number="input[0]" type="number"
ref="firstinput"/>
<input max="9" min="0" maxlength="1" data-index="1" v-model.trim.number="input[1]" type="number"/>
<input max="9" min="0" maxlength="1" data-index="2" v-model.trim.number="input[2]" type="number"/>
<input
<input max="9" min="0" maxlength="1" data-index="4" v-model.trim.number="input[4]" type="number"/>
<input max="9" min="0" maxlength="1" data-index="5" v-model.trim.number="input[5]" type="number"/>
</div>
</div>
</template>
實作了鍵盤的keydown/keyup/paste/input和滑鼠滾輪mousewheel事件
使用了6個輸入框的方案來實作。
樣式部分:使用了scss模式
<style scoped>
.input-box {
.input-content {
width: 512px;
height: 60px;
display: flex;
align-items: center;
justify-content: space-between;
input {
color: inherit;
font-family: inherit;
border: 0;
outline: 0;
border-bottom: 1px solid #919191;
height: 60px;
width: 60px;
font-size: 44px;
text-align: center;
}
}
input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
appearance: none;
margin: 0;
}
}
</style>
具體實作邏輯:主要實作以上幾個鍵盤事件操作。
<script>
export default {
data() {
return {
// 存放粘貼進來的數字
pasteResult: [],
};
},
props: ['code'],
computed: {
input() {
// code 是父元件傳進來的預設值,必須是6位長度的數組,這裡就不再做容錯判斷處理
// 最後空數組是預設值
return this.code || this.pasteResult.length === 6 ? this.pasteResult : ['', '', '', '', '', '']
}
},
methods: {
// 解決一個輸入框輸入多個字元
inputEvent(e) {
var index = e.target.dataset.index * 1;
var el = e.target;
this.$set(this.input, index, el.value.slice(0, 1))
},
keydown(e) {
var index = e.target.dataset.index * 1;
var el = e.target;
if (e.key === 'Backspace') {
if (this.input[index].length > 0) {
this.$set(this.input, index, '')
} else {
if (el.previousElementSibling) {
el.previousElementSibling.focus()
this.$set(this.input, index - 1, '')
}
}
} else if (e.key === 'Delete') {
if (this.input[index].length > 0) {
this.$set(this.input, index, '')
} else {
if (el.nextElementSibling) {
this.$set(this.input, index = 1, '')
}
}
if (el.nextElementSibling) {
el.nextElementSibling.focus()
}
} else if (e.key === 'Home') {
el.parentElement.children[0] && el.parentElement.children[0].focus()
} else if (e.key === 'End') {
el.parentElement.children[this.input.length - 1] && el.parentElement.children[this.input.length - 1].focus()
} else if (e.key === 'ArrowLeft') {
if (el.previousElementSibling) {
el.previousElementSibling.focus()
}
} else if (e.key === 'ArrowRight') {
if (el.nextElementSibling) {
el.nextElementSibling.focus()
}
} else if (e.key === 'ArrowUp') {
if (this.input[index] * 1 < 9) {
this.$set(this.input, index, (this.input[index] * 1 + 1).toString());
}
} else if (e.key === 'ArrowDown') {
if (this.input[index] * 1 > 0) {
this.$set(this.input, index, (this.input[index] * 1 - 1).toString());
}
}
},
keyup(e) {
var index = e.target.dataset.index * 1;
var el = e.target;
if (/Digit|Numpad/i.test(e.code)) {
this.$set(this.input, index, e.code.replace(/Digit|Numpad/i, ''));
el.nextElementSibling && el.nextElementSibling.focus();
if (index === 5) {
if (this.input.join('').length === 6) {
document.activeElement.blur();
this.$emit('complete', this.input);
}
}
} else {
if (this.input[index] === '') {
this.$set(this.input, index, '');
}
}
},
mousewheel(e) {
var index = e.target.dataset.index;
if (e.wheelDelta > 0) {
if (this.input[index] * 1 < 9) {
this.$set(this.input, index, (this.input[index] * 1 + 1).toString());
}
} else if (e.wheelDelta < 0) {
if (this.input[index] * 1 > 0) {
this.$set(this.input, index, (this.input[index] * 1 - 1).toString());
}
} else if (e.key === 'Enter') {
if (this.input.join('').length === 6) {
document.activeElement.blur();
this.$emit('complete', this.input);
}
}
},
paste(e) {
// 當進行粘貼時
e.clipboardData.items[0].getAsString(str => {
if (str.toString().length === 6) {
this.pasteResult = str.split('');
document.activeElement.blur();
this.$emit('complete', this.input);
}
})
}
},
mounted() {
// 等待dom渲染完成,在執行focus,否則無法擷取到焦點
this.$nextTick(() => {
this.$refs.firstinput.focus()
})
},
}
</script>
如果你發現了bug,或者有優化空間,歡迎你的指正和建議。我會随時更新到原代碼當中,分享給大家。
本文完~