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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-bottom-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
modelValue: {
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);
// }
// },
modelValue: {
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: ""
}
},
emits: ['change', 'finish'],
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">
// 定义混入指令用于在非nvue环境下的flex定义因为nvue没有display属性会报错
@mixin vue-flex($direction: row) {
/* #ifndef APP-NVUE */
display: flex;
flex-direction: $direction;
/* #endif */
}
@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-primary;
}
.u-middle-line-active {
background: $u-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-bottom-line-active {
background: $u-primary;
}
.u-bottom-line {
height: 4px;
background: #000000;
width: 80%;
position: absolute;
border-radius: 2px;
bottom: 0;
left: 50%;
transform: translate(-50%);
}
</style>