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<template>
<view class="u-code-input">
<view
class="u-code-input__item"
:style="[itemStyle(index)]"
v-for="(item, index) in codeLength"
:key="index"
>
<view
class="u-code-input__item__dot"
v-if="dot && codeArray.length > index"
></view>
<text
v-else
:style="{
fontSize: $u.addUnit(fontSize),
fontWeight: bold ? 'bold' : 'normal',
color: color
}"
>{{codeArray[index]}}</text>
<view
class="u-code-input__item__line"
v-if="mode === 'line'"
:style="[lineStyle]"
></view>
<!-- #ifndef APP-PLUS -->
<view v-if="isFocus && codeArray.length === index" :style="{backgroundColor: color}" class="u-code-input__item__cursor"></view>
<!-- #endif -->
</view>
<input
:disabled="disabledKeyboard"
type="number"
:focus="focus"
:value="inputValue"
:maxlength="maxlength"
:adjustPosition="adjustPosition"
class="u-code-input__input"
@input="inputHandler"
:style="{
height: $u.addUnit(size)
}"
@focus="isFocus = true"
@blur="isFocus = false"
/>
</view>
</template>
<script>
import props from './props.js';
/**
* CodeInput 验证码输入
* @description 该组件一般用于验证用户短信验证码的场景,也可以结合uView的键盘组件使用
* @tutorial https://www.uviewui.com/components/codeInput.html
* @property {String | Number} maxlength 最大输入长度 (默认 6 )
* @property {Boolean} dot 是否用圆点填充 (默认 false )
* @property {String} mode 显示模式,box-盒子模式,line-底部横线模式 (默认 'box' )
* @property {Boolean} hairline 是否细边框 (默认 false )
* @property {String | Number} space 字符间的距离 (默认 10 )
* @property {String | Number} value 预置值
* @property {Boolean} focus 是否自动获取焦点 (默认 false )
* @property {Boolean} bold 字体和输入横线是否加粗 (默认 false )
* @property {String} color 字体颜色 (默认 '#606266' )
* @property {String | Number} fontSize 字体大小,单位px (默认 18 )
* @property {String | Number} size 输入框的大小,宽等于高 (默认 35 )
* @property {Boolean} disabledKeyboard 是否隐藏原生键盘,如果想用自定义键盘的话,需设置此参数为true (默认 false )
* @property {String} borderColor 边框和线条颜色 (默认 '#c9cacc' )
* @property {Boolean} disabledDot 是否禁止输入"."符号 (默认 true )
*
* @event {Function} change 输入内容发生改变时触发,具体见上方说明 value:当前输入的值
* @event {Function} finish 输入字符个数达maxlength值时触发,见上方说明 value:当前输入的值
* @example <u-code-input v-model="value4" :focus="true"></u-code-input>
*/
export default {
name: 'u-code-input',
mixins: [uni.$u.mpMixin, uni.$u.mixin, props],
data() {
return {
inputValue: '',
isFocus: this.focus
}
},
watch: {
value: {
immediate: true,
handler(val) {
// 转为字符串,超出部分截掉
this.inputValue = String(val).substring(0, this.maxlength)
}
},
},
computed: {
// 根据长度,循环输入框的个数,因为头条小程序数值不能用于v-for
codeLength() {
return new Array(Number(this.maxlength))
},
// 循环item的样式
itemStyle() {
return index => {
const addUnit = uni.$u.addUnit
const style = {
width: addUnit(this.size),
height: addUnit(this.size)
}
// 盒子模式下,需要额外进行处理
if (this.mode === 'box') {
// 设置盒子的边框,如果是细边框,则设置为0.5px宽度
style.border = `${this.hairline ? 0.5 : 1}px solid ${this.borderColor}`
// 如果盒子间距为0的话
if (uni.$u.getPx(this.space) === 0) {
// 给第一和最后一个盒子设置圆角
if (index === 0) {
style.borderTopLeftRadius = '3px'
style.borderBottomLeftRadius = '3px'
}
if (index === this.codeLength.length - 1) {
style.borderTopRightRadius = '3px'
style.borderBottomRightRadius = '3px'
}
// 最后一个盒子的右边框需要保留
if (index !== this.codeLength.length - 1) {
style.borderRight = 'none'
}
}
}
if (index !== this.codeLength.length - 1) {
// 设置验证码字符之间的距离,通过margin-right设置,最后一个字符,无需右边框
style.marginRight = addUnit(this.space)
} else {
// 最后一个盒子的有边框需要保留
style.marginRight = 0
}
return style
}
},
// 将输入的值,转为数组,给item历遍时,根据当前的索引显示数组的元素
codeArray() {
return String(this.inputValue).split('')
},
// 下划线模式下,横线的样式
lineStyle() {
const style = {}
style.height = this.hairline ? '2px' : '4px'
style.width = uni.$u.addUnit(this.size)
// 线条模式下,背景色即为边框颜色
style.backgroundColor = this.borderColor
return style
}
},
methods: {
// 监听输入框的值发生变化
inputHandler(e) {
const value = e.detail.value
this.inputValue = value
// 是否允许输入“.”符号
if(this.disabledDot) {
this.$nextTick(() => {
this.inputValue = value.replace('.', '')
})
}
// 未达到maxlength之前,发送change事件,达到后发送finish事件
this.$emit('change', value)
// 修改通过v-model双向绑定的值
this.$emit('input', value)
// 达到用户指定输入长度时,发出完成事件
if (String(value).length >= Number(this.maxlength)) {
this.$emit('finish', value)
}
}
}
}
</script>
<style lang="scss" scoped>
@import "../../libs/css/components.scss";
$u-code-input-cursor-width: 1px;
$u-code-input-cursor-height: 40%;
$u-code-input-cursor-animation-duration: 1s;
$u-code-input-cursor-animation-name: u-cursor-flicker;
.u-code-input {
@include flex;
position: relative;
overflow: hidden;
&__item {
@include flex;
justify-content: center;
align-items: center;
position: relative;
&__text {
font-size: 15px;
color: $u-content-color;
}
&__dot {
width: 7px;
height: 7px;
border-radius: 100px;
background-color: $u-content-color;
}
&__line {
position: absolute;
bottom: 0;
height: 4px;
border-radius: 100px;
width: 40px;
background-color: $u-content-color;
}
/* #ifndef APP-PLUS */
&__cursor {
position: absolute;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
width: $u-code-input-cursor-width;
height: $u-code-input-cursor-height;
animation: $u-code-input-cursor-animation-duration u-cursor-flicker infinite;
}
/* #endif */
}
&__input {
// 之所以需要input输入框,是因为有它才能唤起键盘
// 这里将它设置为两倍的屏幕宽度,再将左边的一半移出屏幕,为了不让用户看到输入的内容
position: absolute;
left: -750rpx;
width: 1500rpx;
top: 0;
background-color: transparent;
text-align: left;
}
}
/* #ifndef APP-PLUS */
@keyframes u-cursor-flicker {
0% {
opacity: 0;
}
50% {
opacity: 1;
}
100% {
opacity: 0;
}
}
/* #endif */
</style>