【uniapp】短信验证码输入框

需求是短信验证码需要格子输入框 如图

网上找了一个案例改吧改吧 直接上代码

结构

<template>
	<view class="verify-code">
		<!-- 输入框 -->
		<input id="input" :value="code" class="input" :focus="isFocus" :type="inputType" :maxlength="itemSize"
			@input="onInput" @focus="inputFocus" @blur="inputBlur" />

		<!-- 光标 -->
		<view id="cursor" v-if="cursorVisible && type !== 'middle'" class="cursor"
			:style="{ left: codeCursorLeft[code.length] + 'px', height: cursorHeight + 'px', backgroundColor: cursorColor }">
		</view>

		<!-- 输入框 - 组 -->
		<view id="input-ground" class="input-ground">
			<view v-for="(item, index) in itemSize" :key="index"
				:style="{ borderColor: code.length === index && cursorVisible ? boxActiveColor : boxNormalColor }"
				:class="['box', `box-${type + ''}`, `box::after`]">
				<view :style="{ borderColor: boxActiveColor }" class="middle-line"
					v-if="type === 'middle' && !code[index]"></view>

				<text class="code-text">{{ code[index] | codeFormat(isPassword) }}</text>
			</view>
		</view>
	</view>
</template>

<script>
	/**
	 * @description 输入验证码组件
	 * @property {string} type = [box|middle|bottom] - 显示类型 默认：box -eg:bottom
	 * @property {string} inputType = [text|number] - 输入框类型 默认：number -eg:number
	 * @property {number} size - 验证码输入框数量 默认：6 -eg:6
	 * @property {boolean} isFocus - 是否立即聚焦 默认：true
	 * @property {boolean} isPassword - 是否以密码形式显示 默认false -eg: false
	 * @property {string} cursorColor - 光标颜色 默认：#cccccc
	 * @property {string} boxNormalColor - 光标未聚焦到的框的颜色 默认：#cccccc
	 * @property {string} boxActiveColor - 光标聚焦到的框的颜色 默认：#000000
	 * @event {Function(data)} confirm - 输入完成回调函数
	 */
	import {
		getElementRect
	} from './util.js';
	export default {
		name: 'verify-code',
		props: {
			value: {
				type: String,
				default: () => ''
			},
			type: {
				type: String,
				default: () => 'box'
			},
			inputType: {
				type: String,
				default: () => 'number'
			},
			size: {
				type: Number,
				default: () => 6
			},
			isFocus: {
				type: Boolean,
				default: () => true
			},
			isPassword: {
				type: Boolean,
				default: () => false
			},
			cursorColor: {
				type: String,
				default: () => '#cccccc'
			},
			boxNormalColor: {
				type: String,
				default: () => '#cccccc'
			},
			boxActiveColor: {
				type: String,
				default: () => '#000000'
			}
		},
		model: {
			prop: 'value',
			event: 'input'
		},
		data() {
			return {
				cursorVisible: false,
				cursorHeight: 35,
				code: '', // 输入的验证码
				codeCursorLeft: [], // 向左移动的距离数组,
				itemSize: 6,
				getElement: getElementRect(this),
				isPatch: false
			};
		},
		created() {
			this.cursorVisible = this.isFocus;
			this.validatorSize();
		},
		mounted() {
			this.init();
		},
		methods: {
			/**
			 * 设置验证码框数量
			 */
			validatorSize() {
				if (this.size > 0) {
					this.itemSize = Math.floor(this.size);
				} else {
					throw "methods of 'size' is integer";
				}
			},
			/**
			 * @description 初始化
			 */
			init() {
				this.getCodeCursorLeft();
				this.setCursorHeight();
			},
			/**
			 * @description 计算光标的高度
			 */
			setCursorHeight() {
				this.getElement('.box', 'single', boxElm => {
					this.cursorHeight = boxElm.height * 0.6;
				});
			},
			/**
			 * @description 获取光标在每一个box的left位置
			 */
			getCodeCursorLeft() {
				// 获取父级框的位置信息
				this.getElement('#input-ground', 'single', parentElm => {
					const parentLeft = parentElm.left;
					// 获取各个box信息
					this.getElement('.box', 'array', elms => {
						this.codeCursorLeft = [];
						elms.forEach(elm => {
							this.codeCursorLeft.push(elm.left - parentLeft + elm.width / 2);
						});
					});
				});
			},

			// 输入框输入变化的回调
			onInput(e) {
				let {
					value,
					keyCode
				} = e.detail;
				this.cursorVisible = value.length < this.itemSize;
				this.code = value;
				this.$emit('input', value);
				this.inputSuccess(value);
			},

			// 输入完成回调
			inputSuccess(value) {
				if (value.length === this.itemSize && !this.isPatch) {
					this.$emit('confirm', value);
				} else {
					this.isPatch = false;
				}
			},
			// 输入聚焦
			inputFocus() {
				this.cursorVisible = this.code.length < this.itemSize;
			},
			// 输入失去焦点
			inputBlur() {
				this.cursorVisible = false;
			}
		},
		watch: {
			value(val) {
				if (val !== this.code) {
					this.code = val;
				}
			}
		},
		filters: {
			codeFormat(val, isPassword) {
				return val ? (isPassword ? '*' : val) : '';
			}
		}
	};
</script>
<style scoped>
	.verify-code {
		position: relative;
		width: 100%;
		box-sizing: border-box;
	}

	.verify-code .input {
		height: 100%;
		width: 200%;
		position: absolute;
		left: -100%;
		z-index: 1;
		color: transparent;
		caret-color: transparent;
		background-color: rgba(0, 0, 0, 0);
	}

	.verify-code .cursor {
		position: absolute;
		top: 50%;
		transform: translateY(-50%);
		display: inline-block;
		width: 2px;
		animation-name: cursor;
		animation-duration: 0.8s;
		animation-iteration-count: infinite;
	}

	.verify-code .input-ground {
		display: flex;
		justify-content: space-between;
		align-items: center;
		width: 100%;
		box-sizing: border-box;
	}

	.verify-code .input-ground .box {
		position: relative;
		display: inline-block;
		width: 100rpx;
		height: 140rpx;
	}

	.verify-code .input-ground .box-bottom {
		border-bottom-width: 2px;
		border-bottom-style: solid;
	}

	.verify-code .input-ground .box-box {
		border-width: 2px;
		border-style: solid;
	}

	.verify-code .input-ground .box-middle {
		border: none;
	}

	.input-ground .box .middle-line {
		position: absolute;
		top: 50%;
		left: 50%;
		width: 50%;
		transform: translate(-50%, -50%);
		border-bottom-width: 2px;
		border-bottom-style: solid;
	}

	.input-ground .box .code-text {
		position: absolute;
		top: 50%;
		left: 50%;
		font-size: 80rpx;
		transform: translate(-50%, -50%);
	}

	@keyframes cursor {
		0% {
			opacity: 1;
		}

		100% {
			opacity: 0;
		}
	}
</style>
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util.js

/**
 * @description 获取元素节点 - 大小等信息
 * @param {string} elm - 节点的id、class 相当于 document.querySelect的参数 -eg: #id
 * @param {string} type = [single|array] - 单个元素获取多个元素 默认是单个元素
 * @param {Function} callback - 回调函数
 * @param {object} that - 上下文环境 vue2：this ,vue3: getCurrentInstance();
 */
export const getElementRect = (that) => (elm, type = 'single', callback) => {
	// #ifndef H5
	uni
		.createSelectorQuery()
		.in(that)[type === 'array' ? 'selectAll' : 'select'](elm)
		.boundingClientRect()
		.exec(data => {
			callback(data[0]);
		});
	// #endif

	// #ifdef H5
	let elmArr = [];
	const result = [];
	if (type === 'array') {
		elmArr = document.querySelectorAll(elm);
	} else {
		elmArr.push(document.querySelector(elm));
	}

	for (let elm of elmArr) {
		result.push(elm.getBoundingClientRect());
	}
	console.log('result', result)
	callback(type === 'array' ? result : result[0]);
	// #endif
}
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