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<template> <view class="u-char-box"> <view class="u-char-flex"> <input :disabled="disabledKeyboard" :value="valueModel" type="number" :focus="focus" :maxlength="maxlength" class="u-input" @input="getVal"/> <view v-for="(item, index) in loopCharArr" :key="index"> <view :class="[breathe && charArrLength == index ? 'u-breathe' : '', 'u-char-item', charArrLength === index && mode == 'box' ? 'u-box-active' : '', mode === 'box' ? 'u-box' : '']" :style="{ fontWeight: bold ? 'bold' : 'normal', fontSize: fontSize + 'rpx', width: width + 'rpx', height: width + 'rpx', color: inactiveColor, borderColor: charArrLength === index && mode == 'box' ? activeColor : inactiveColor }"> <view class="u-placeholder-line" :style="{ display: charArrLength === index ? 'block' : 'none', height: width * 0.5 +'rpx' }" v-if="mode !== 'middleLine'" ></view> <view v-if="mode === 'middleLine' && charArrLength <= index" :class="[breathe && charArrLength == index ? 'u-breathe' : '', charArrLength === index ? 'u-middle-line-active' : '']" class="u-middle-line" :style="{height: bold ? '4px' : '2px', background: charArrLength === index ? activeColor : inactiveColor}"></view> <view v-if="mode === 'bottomLine'" :class="[breathe && charArrLength == index ? 'u-breathe' : '', charArrLength === index ? 'u-buttom-line-active' : '']" class="u-bottom-line" :style="{height: bold ? '4px' : '2px', background: charArrLength === index ? activeColor : inactiveColor}"></view> <block v-if="!dotFill"> {{ charArr[index] ? charArr[index] : ''}}</block> <block v-else> <text class="u-dot">{{ charArr[index] ? '●' : ''}}</text> </block> </view> </view> </view> </view> </template>
<script> /** * messageInput 验证码输入框 * @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/messageInput.html
* @property {String Number} maxlength 输入字符个数(默认4) * @property {Boolean} dot-fill 是否用圆点填充(默认false) * @property {String} mode 模式选择,见上方"基本使用"说明(默认box) * @property {String Number} value 预置值 * @property {Boolean} breathe 是否开启呼吸效果,见上方说明(默认true) * @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true) * @property {String Number} font-size 字体大小,单位rpx(默认60) * @property {String} active-color 当前激活输入框的样式(默认#2979ff) * @property {String} inactive-color 非激活输入框的样式,文字颜色同此值(默认#606266) * @property {String | Number} width 输入框宽度,单位rpx,高等于宽(默认80) * @property {Boolean} disabled-keyboard 禁止点击输入框唤起系统键盘(默认false) * @event {Function} change 输入内容发生改变时触发,具体见官网说明 * @event {Function} finish 输入字符个数达maxlength值时触发,见官网说明 * @example <u-message-input mode="bottomLine"></u-message-input> */ export default { name: "u-message-input", props: { // 最大输入长度
maxlength: { type: [Number, String], default: 4 }, // 是否用圆点填充
dotFill: { type: Boolean, default: false }, // 显示模式,box-盒子模式,bottomLine-横线在底部模式,middleLine-横线在中部模式
mode: { type: String, default: "box" }, // 预置值
value: { type: [String, Number], default: '' }, // 当前激活输入item,是否带有呼吸效果
breathe: { type: Boolean, default: true }, // 是否自动获取焦点
focus: { type: Boolean, default: false }, // 字体是否加粗
bold: { type: Boolean, default: false }, // 字体大小
fontSize: { type: [String, Number], default: 60 }, // 激活样式
activeColor: { type: String, default: '#2979ff' }, // 未激活的样式
inactiveColor: { type: String, default: '#606266' }, // 输入框的大小,单位rpx,宽等于高
width: { type: [Number, String], default: '80' }, // 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
disabledKeyboard: { type: Boolean, default: false } }, watch: { // maxlength: {
// // 此值设置为true,会在组件加载后无需maxlength变化就会执行一次本监听函数,无需再created生命周期中处理
// immediate: true,
// handler(val) {
// this.maxlength = Number(val);
// }
// },
value: { immediate: true, handler(val) { // 转为字符串
val = String(val); // 超出部分截掉
this.valueModel = val.substring(0, this.maxlength); } }, }, data() { return { valueModel: "" } }, computed: { // 是否显示呼吸灯效果
animationClass() { return (index) => { if (this.breathe && this.charArr.length == index) return 'u-breathe'; else return ''; } }, // 用于显示字符
charArr() { return this.valueModel.split(''); }, charArrLength() { return this.charArr.length; }, // 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
loopCharArr() { return new Array(this.maxlength); } }, methods: { getVal(e) { let { value } = e.detail this.valueModel = value; // 判断长度是否超出了maxlength值,理论上不会发生,因为input组件设置了maxlength属性值
if (String(value).length > this.maxlength) return; // 未达到maxlength之前,发送change事件,达到后发送finish事件
this.$emit('change', value); if (String(value).length == this.maxlength) { this.$emit('finish', value); } } } } </script>
<style scoped lang="scss"> @import "../../libs/css/style.components.scss";
@keyframes breathe { 0% { opacity: 0.3; }
50% { opacity: 1; }
100% { opacity: 0.3; } }
.u-char-box { text-align: center; }
.u-char-flex { @include vue-flex; justify-content: center; flex-wrap: wrap; position: relative; }
.u-input { position: absolute; top: 0; left: -100%; width: 200%; height: 100%; text-align: left; z-index: 9; opacity: 0; background: none; }
.u-char-item { position: relative; width: 90rpx; height: 90rpx; margin: 10rpx 10rpx; font-size: 60rpx; font-weight: bold; color: $u-main-color; line-height: 90rpx; @include vue-flex; justify-content: center; align-items: center; }
.u-middle-line { border: none; }
.u-box { box-sizing: border-box; border: 2rpx solid #cccccc; border-radius: 6rpx; }
.u-box-active { overflow: hidden; animation-timing-function: ease-in-out; animation-duration: 1500ms; animation-iteration-count: infinite; animation-direction: alternate; border: 2rpx solid $u-type-primary; }
.u-middle-line-active { background: $u-type-primary; }
.u-breathe { animation: breathe 2s infinite ease; }
.u-placeholder-line { /* #ifndef APP-NVUE */ display: none; /* #endif */ position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%); width: 2rpx; height: 40rpx; background: #333333; animation: twinkling 1.5s infinite ease; }
.u-animation-breathe { animation-name: breathe; }
.u-dot { font-size: 34rpx; line-height: 34rpx; }
.u-middle-line { height: 4px; background: #000000; width: 80%; position: absolute; border-radius: 2px; top: 50%; left: 50%; transform: translate(-50%, -50%); }
.u-buttom-line-active { background: $u-type-primary; }
.u-bottom-line { height: 4px; background: #000000; width: 80%; position: absolute; border-radius: 2px; bottom: 0; left: 50%; transform: translate(-50%); } </style>
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