New file |
| | |
| | | <template> |
| | | <view class="u-textarea" :class="textareaClass" :style="[textareaStyle]"> |
| | | <textarea |
| | | class="u-textarea__field" |
| | | :value="innerValue" |
| | | :style="{ height: $u.addUnit(height) }" |
| | | :placeholder="placeholder" |
| | | :placeholder-style="$u.addStyle(placeholderStyle, 'string')" |
| | | :placeholder-class="placeholderClass" |
| | | :disabled="disabled" |
| | | :focus="focus" |
| | | :autoHeight="autoHeight" |
| | | :fixed="fixed" |
| | | :cursorSpacing="cursorSpacing" |
| | | :cursor="cursor" |
| | | :showConfirmBar="showConfirmBar" |
| | | :selectionStart="selectionStart" |
| | | :selectionEnd="selectionEnd" |
| | | :adjustPosition="adjustPosition" |
| | | :disableDefaultPadding="disableDefaultPadding" |
| | | :holdKeyboard="holdKeyboard" |
| | | :maxlength="maxlength" |
| | | :confirmType="confirmType" |
| | | :ignoreCompositionEvent="ignoreCompositionEvent" |
| | | @focus="onFocus" |
| | | @blur="onBlur" |
| | | @linechange="onLinechange" |
| | | @input="onInput" |
| | | @confirm="onConfirm" |
| | | @keyboardheightchange="onKeyboardheightchange" |
| | | ></textarea> |
| | | <text |
| | | class="u-textarea__count" |
| | | :style="{ |
| | | 'background-color': disabled ? 'transparent' : '#fff', |
| | | }" |
| | | v-if="count" |
| | | >{{ innerValue.length }}/{{ maxlength }}</text |
| | | > |
| | | </view> |
| | | </template> |
| | | |
| | | <script> |
| | | import props from "./props.js"; |
| | | /** |
| | | * Textarea 文本域 |
| | | * @description 文本域此组件满足了可能出现的表单信息补充,编辑等实际逻辑的功能,内置了字数校验等 |
| | | * @tutorial https://www.uviewui.com/components/textarea.html |
| | | * |
| | | * @property {String | Number} value 输入框的内容 |
| | | * @property {String | Number} placeholder 输入框为空时占位符 |
| | | * @property {String} placeholderClass 指定placeholder的样式类,注意页面或组件的style中写了scoped时,需要在类名前写/deep/ ( 默认 'input-placeholder' ) |
| | | * @property {String | Object} placeholderStyle 指定placeholder的样式,字符串/对象形式,如"color: red;" |
| | | * @property {String | Number} height 输入框高度(默认 70 ) |
| | | * @property {String} confirmType 设置键盘右下角按钮的文字,仅微信小程序,App-vue和H5有效(默认 'done' ) |
| | | * @property {Boolean} disabled 是否禁用(默认 false ) |
| | | * @property {Boolean} count 是否显示统计字数(默认 false ) |
| | | * @property {Boolean} focus 是否自动获取焦点,nvue不支持,H5取决于浏览器的实现(默认 false ) |
| | | * @property {Boolean | Function} autoHeight 是否自动增加高度(默认 false ) |
| | | * @property {Boolean} fixed 如果textarea是在一个position:fixed的区域,需要显示指定属性fixed为true(默认 false ) |
| | | * @property {Number} cursorSpacing 指定光标与键盘的距离(默认 0 ) |
| | | * @property {String | Number} cursor 指定focus时的光标位置 |
| | | * @property {Function} formatter 内容式化函数 |
| | | * @property {Boolean} showConfirmBar 是否显示键盘上方带有”完成“按钮那一栏,(默认 true ) |
| | | * @property {Number} selectionStart 光标起始位置,自动聚焦时有效,需与selection-end搭配使用,(默认 -1 ) |
| | | * @property {Number | Number} selectionEnd 光标结束位置,自动聚焦时有效,需与selection-start搭配使用(默认 -1 ) |
| | | * @property {Boolean} adjustPosition 键盘弹起时,是否自动上推页面(默认 true ) |
| | | * @property {Boolean | Number} disableDefaultPadding 是否去掉 iOS 下的默认内边距,只微信小程序有效(默认 false ) |
| | | * @property {Boolean} holdKeyboard focus时,点击页面的时候不收起键盘,只微信小程序有效(默认 false ) |
| | | * @property {String | Number} maxlength 最大输入长度,设置为 -1 的时候不限制最大长度(默认 140 ) |
| | | * @property {String} border 边框类型,surround-四周边框,none-无边框,bottom-底部边框(默认 'surround' ) |
| | | * @property {Boolean} ignoreCompositionEvent 是否忽略组件内对文本合成系统事件的处理 |
| | | * |
| | | * @event {Function(e)} focus 输入框聚焦时触发,event.detail = { value, height },height 为键盘高度 |
| | | * @event {Function(e)} blur 输入框失去焦点时触发,event.detail = {value, cursor} |
| | | * @event {Function(e)} linechange 输入框行数变化时调用,event.detail = {height: 0, heightRpx: 0, lineCount: 0} |
| | | * @event {Function(e)} input 当键盘输入时,触发 input 事件 |
| | | * @event {Function(e)} confirm 点击完成时, 触发 confirm 事件 |
| | | * @event {Function(e)} keyboardheightchange 键盘高度发生变化的时候触发此事件 |
| | | * @example <u--textarea v-model="value1" placeholder="请输入内容" ></u--textarea> |
| | | */ |
| | | export default { |
| | | name: "u-textarea", |
| | | mixins: [uni.$u.mpMixin, uni.$u.mixin, props], |
| | | data() { |
| | | return { |
| | | // 输入框的值 |
| | | innerValue: "", |
| | | // 是否处于获得焦点状态 |
| | | focused: false, |
| | | // value是否第一次变化,在watch中,由于加入immediate属性,会在第一次触发,此时不应该认为value发生了变化 |
| | | firstChange: true, |
| | | // value绑定值的变化是由内部还是外部引起的 |
| | | changeFromInner: false, |
| | | // 过滤处理方法 |
| | | innerFormatter: value => value |
| | | } |
| | | }, |
| | | watch: { |
| | | value: { |
| | | immediate: true, |
| | | handler(newVal, oldVal) { |
| | | this.innerValue = newVal; |
| | | /* #ifdef H5 */ |
| | | // 在H5中,外部value变化后,修改input中的值,不会触发@input事件,此时手动调用值变化方法 |
| | | if ( |
| | | this.firstChange === false && |
| | | this.changeFromInner === false |
| | | ) { |
| | | this.valueChange(); |
| | | } |
| | | /* #endif */ |
| | | this.firstChange = false; |
| | | // 重置changeFromInner的值为false,标识下一次引起默认为外部引起的 |
| | | this.changeFromInner = false; |
| | | }, |
| | | }, |
| | | }, |
| | | computed: { |
| | | // 组件的类名 |
| | | textareaClass() { |
| | | let classes = [], |
| | | { border, disabled, shape } = this; |
| | | border === "surround" && |
| | | (classes = classes.concat(["u-border", "u-textarea--radius"])); |
| | | border === "bottom" && |
| | | (classes = classes.concat([ |
| | | "u-border-bottom", |
| | | "u-textarea--no-radius", |
| | | ])); |
| | | disabled && classes.push("u-textarea--disabled"); |
| | | return classes.join(" "); |
| | | }, |
| | | // 组件的样式 |
| | | textareaStyle() { |
| | | const style = {}; |
| | | // #ifdef APP-NVUE |
| | | // 由于textarea在安卓nvue上的差异性,需要额外再调整其内边距 |
| | | if (uni.$u.os() === "android") { |
| | | style.paddingTop = "6px"; |
| | | style.paddingLeft = "9px"; |
| | | style.paddingBottom = "3px"; |
| | | style.paddingRight = "6px"; |
| | | } |
| | | // #endif |
| | | return uni.$u.deepMerge(style, uni.$u.addStyle(this.customStyle)); |
| | | }, |
| | | }, |
| | | methods: { |
| | | // 在微信小程序中,不支持将函数当做props参数,故只能通过ref形式调用 |
| | | setFormatter(e) { |
| | | this.innerFormatter = e |
| | | }, |
| | | onFocus(e) { |
| | | this.$emit("focus", e); |
| | | }, |
| | | onBlur(e) { |
| | | this.$emit("blur", e); |
| | | // 尝试调用u-form的验证方法 |
| | | uni.$u.formValidate(this, "blur"); |
| | | }, |
| | | onLinechange(e) { |
| | | this.$emit("linechange", e); |
| | | }, |
| | | onInput(e) { |
| | | let { value = "" } = e.detail || {}; |
| | | // 格式化过滤方法 |
| | | const formatter = this.formatter || this.innerFormatter |
| | | const formatValue = formatter(value) |
| | | // 为了避免props的单向数据流特性,需要先将innerValue值设置为当前值,再在$nextTick中重新赋予设置后的值才有效 |
| | | this.innerValue = value |
| | | this.$nextTick(() => { |
| | | this.innerValue = formatValue; |
| | | this.valueChange(); |
| | | }) |
| | | }, |
| | | // 内容发生变化,进行处理 |
| | | valueChange() { |
| | | const value = this.innerValue; |
| | | this.$nextTick(() => { |
| | | this.$emit("input", value); |
| | | // 标识value值的变化是由内部引起的 |
| | | this.changeFromInner = true; |
| | | this.$emit("change", value); |
| | | // 尝试调用u-form的验证方法 |
| | | uni.$u.formValidate(this, "change"); |
| | | }); |
| | | }, |
| | | onConfirm(e) { |
| | | this.$emit("confirm", e); |
| | | }, |
| | | onKeyboardheightchange(e) { |
| | | this.$emit("keyboardheightchange", e); |
| | | }, |
| | | }, |
| | | }; |
| | | </script> |
| | | |
| | | <style lang="scss" scoped> |
| | | @import "../../libs/css/components.scss"; |
| | | |
| | | .u-textarea { |
| | | border-radius: 4px; |
| | | background-color: #fff; |
| | | position: relative; |
| | | @include flex; |
| | | flex: 1; |
| | | padding: 9px; |
| | | |
| | | &--radius { |
| | | border-radius: 4px; |
| | | } |
| | | |
| | | &--no-radius { |
| | | border-radius: 0; |
| | | } |
| | | |
| | | &--disabled { |
| | | background-color: #f5f7fa; |
| | | } |
| | | |
| | | &__field { |
| | | flex: 1; |
| | | font-size: 15px; |
| | | color: $u-content-color; |
| | | width: 100%; |
| | | } |
| | | |
| | | &__count { |
| | | position: absolute; |
| | | right: 5px; |
| | | bottom: 2px; |
| | | font-size: 12px; |
| | | color: $u-tips-color; |
| | | background-color: #ffffff; |
| | | padding: 1px 4px; |
| | | } |
| | | } |
| | | </style> |