139 lines
3.0 KiB
Vue
139 lines
3.0 KiB
Vue
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<template>
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<view>
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<view style="position: relative" v-if="isHide">
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<view class="dt-content" :style="'-webkit-line-clamp:'+line">
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<text class="content">
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<slot>{{ dt ? dt : '' }}</slot>
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</text>
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</view>
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<view class="button-show" @tap="isHide = false" v-if="enableButton&&lines>line">
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<text style="color: blue">{{ expandText }}</text>
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</view>
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</view>
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<view v-else>
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<view>
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<text class="content">
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<slot>{{ dt ? dt : '' }}</slot>
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</text>
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</view>
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<view class="fold-hint" v-if="foldHint">
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<view @tap="isHide = true">
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{{ foldHint }}
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</view>
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</view>
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</view>
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<view>
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<text class="placeholder">
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{{ placeholder }}
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</text>
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</view>
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</view>
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</template>
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<script>
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export default {
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data() {
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return {
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// 是否隐藏多余行。初始状态不隐藏
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isHide: true,
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// 全量所占文本高度
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textHeight: 0,
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// 单行文本所占高度
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lineHeight: 1,
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// 占位文本
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placeholder: '占位'
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};
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},
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props: {
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// 展示多少行
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line: {
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type: [Number, String],
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default: 1
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},
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// 文本
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dt: {
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type: [String],
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default: ''
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},
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enableButton: {
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type: Boolean,
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default: true
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},
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// 自定义展开提示
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expandText: {
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type: String,
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default: "展开"
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},
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// 自定义收起提示
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foldHint: {
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type: String,
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default: "收起"
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}
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},
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watch:{
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dt(){
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let that = this
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setTimeout(() => {
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let query = uni.createSelectorQuery().in(that);
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// 获取所有文本在html中的高度
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query.select('.content').boundingClientRect(data => {
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that.textHeight = data.height
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}).exec();
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}, 100)
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}
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},
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mounted() {
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if (this.enableButton) {
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let query = uni.createSelectorQuery().in(this);
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// 获取所有文本在html中的高度
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query.select('.content').boundingClientRect(data => {
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this.textHeight = data.height
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}).exec();
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// 通过占位元素获取单行文本的高度
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query.select('.placeholder').boundingClientRect(data => {
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this.lineHeight = data.height
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}).exec();
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}
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// 获取单行文本高度后，置空占位元素，使其释放占位
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this.placeholder = ''
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},
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computed: {
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// 全文本所占总行数
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lines() {
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if (!this.enableButton) {
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return this.line
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}
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return Math.floor(this.textHeight > 0 && this.lineHeight > 0 ? this.textHeight / this.lineHeight : 0)
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}
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}
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}
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</script>
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<style scoped>
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.dt-content {
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overflow: hidden;
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text-overflow: clip;
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display: -webkit-box;
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-webkit-box-orient: vertical;
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}
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.button-show {
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width: 70rpx;
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position: absolute;
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right: 0;
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bottom: 0;
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z-index: 0;
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text-align: right;
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background-image: linear-gradient(-180deg, rgba(233, 236, 239, 0) 50%, #FFF 80%);
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padding-top: 2rem;
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}
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.fold-hint {
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color: blue;
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text-align: right
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}
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</style>
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