| <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> |