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- <template>
- <view class="uv-textarea"
- :class="textareaClass"
- :style="[textareaStyle]">
- <textarea class="uv-textarea__field"
- :value="innerValue"
- :style="[
- {height: autoHeight ? 'auto' :$uv.addUnit(height)},
- $uv.addStyle(textStyle)
- ]"
- :placeholder="placeholder"
- :placeholder-style="$uv.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="maxlen"
- :confirmType="confirmType"
- :ignoreCompositionEvent="ignoreCompositionEvent"
- :confirm-hold="confirmHold"
- @focus="onFocus"
- @blur="onBlur"
- @linechange="onLinechange"
- @input="onInput"
- @confirm="onConfirm"
- @keyboardheightchange="onKeyboardheightchange"></textarea>
- <text class="uv-textarea__count"
- :style="[{
- 'background-color': disabled ? 'transparent' : '#fff',
- },$uv.addStyle(countStyle)]"
- v-if="count && maxlen!=-1">{{ getCount }}/{{ maxlen }}</text>
- </view>
- </template>
- <script>
- import mpMixin from '@/uni_modules/uv-ui-tools/libs/mixin/mpMixin.js'
- import mixin from '@/uni_modules/uv-ui-tools/libs/mixin/mixin.js'
- 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.uvui.cn/components/textarea.html
- *
- * @property {String | Number} value / v-model 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
- * @property {Boolean} confirmHold 点击键盘右下角按钮时是否保持键盘不收起
- * @property {Object} textStyle 文本样式
- * @property {Object} countStyle 统计数字的样式
- *
- * @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 <uv--textarea v-model="value1" placeholder="请输入内容" ></uv--textarea>
- */
- export default {
- name: "uv-textarea",
- mixins: [mpMixin, mixin, props],
- data() {
- return {
- // 输入框的值
- innerValue: "",
- // 是否处于获得焦点状态
- focused: false,
- // 过滤处理方法
- innerFormatter: value => value
- }
- },
- created() {
- // #ifndef VUE3
- this.innerValue = this.value;
- // #endif
- // #ifdef VUE3
- this.innerValue = this.modelValue;
- // #endif
- },
- watch: {
- value(newVal) {
- this.innerValue = newVal;
- },
- modelValue(newVal) {
- this.innerValue = newVal;
- }
- },
- computed: {
- // 组件的类名
- textareaClass() {
- let classes = [],
- { border, disabled } = this;
- border === "surround" && (classes = classes.concat(["uv-border", "uv-textarea--radius"]));
- border === "bottom" && (classes = classes.concat(["uv-border-bottom", "uv-textarea--no-radius", ]));
- disabled && classes.push("uv-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 (this.$uv.os() === "android") {
- style.paddingTop = "6px";
- style.paddingLeft = "9px";
- style.paddingBottom = "3px";
- style.paddingRight = "6px";
- }
- // #endif
- return this.$uv.deepMerge(style, this.$uv.addStyle(this.customStyle));
- },
- maxlen() {
- return this.maxlength < 0 ? this.maxlength < 0 ? -1 : 140 : this.maxlength;
- },
- getCount() {
- try{
- return this.innerValue.length > this.maxlen ? this.maxlen: this.innerValue.length;
- }catch(e){
- return 0;
- }
- }
- },
- 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uv-form的验证方法
- this.$uv.formValidate(this, "blur");
- },
- onLinechange(e) {
- this.$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);
- this.$emit("update:modelValue", value);
- this.$emit("change", value);
- // 尝试调用uv-form的验证方法
- this.$uv.formValidate(this, "change");
- });
- },
- onConfirm(e) {
- this.$emit("confirm", e);
- },
- onKeyboardheightchange(e) {
- this.$emit("keyboardheightchange", e);
- },
- },
- };
- </script>
- <style lang="scss" scoped>
- $show-border: 1;
- $show-border-surround: 1;
- $show-border-bottom: 1;
- @import '@/uni_modules/uv-ui-tools/libs/css/variable.scss';
- @import '@/uni_modules/uv-ui-tools/libs/css/components.scss';
- @import '@/uni_modules/uv-ui-tools/libs/css/color.scss';
- .uv-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: $uv-content-color;
- width: 100%;
- }
- &__count {
- position: absolute;
- right: 5px;
- bottom: 2px;
- font-size: 12px;
- color: $uv-tips-color;
- background-color: #ffffff;
- padding: 1px 4px;
- }
- }
- </style>
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