uni-app无限级树形组件简单实现代码
作者:洗发水很好用
文章介绍了如何在uni-app中简单封装一个无限级树形组件,该组件可以无线嵌套,展开和收缩,并获取子节点数据,本文通过实例代码给大家介绍的非常详细,感兴趣的朋友一起看看吧
因为项目一些数据需要树形展示,但是官网组件没有。现在简单封装一个组件在app中使用,可以无线嵌套,展开,收缩,获取子节点数据等。
简单效果
组件TreeData
<template> <view class="tree"> <template v-for="(node, index) in treeData"> <view> <span @click="toggleNode($event, node)"> <uni-icons v-if="node.children && node.children.length > 0" :type="node.expanded ? 'arrowdown' : 'arrowright'" size="14" ></uni-icons> {{ node.label }} </span> <span @click.stop="deleteNode($event, node)" class="action-button delete-button" >删除</span > <span @click.stop="editNode($event, node)" class="action-button edit-button" >编辑</span > <view v-if="node.expanded" class="children"> <Tree :treeData="node.children" @edit-node="(childNode) => $emit('edit-node', childNode)" @delete-node="(childNode) => $emit('delete-node', childNode)" /> </view> </view> </template> </view> </template> <script> export default { name: "Tree", props: { treeData: { type: Array, default: () => [], }, expandAll: { type: Boolean, default: true, }, }, data() { return { init: false, }; }, watch: { treeData: { immediate: true, handler(newData) { if (!this.init) { this.initializeTreeData(newData, this.expandAll); this.init = true; } }, }, }, methods: { initializeTreeData(nodes, expanded) { nodes.forEach((node) => { this.$set(node, "expanded", expanded); // 使用 $set 确保响应式 if (node.children && node.children.length > 0) { this.initializeTreeData(node.children, expanded); // 递归处理子节点 } }); }, toggleNode(event, node) { event.stopPropagation(); // 阻止事件冒泡 node.expanded = !node.expanded; // 切换节点展开状态 }, editNode(event, node) { event.stopPropagation(); this.$emit("edit-node", node); // 触发父组件的 edit-node 事件,并传递当前节点 }, deleteNode(event, node) { event.stopPropagation(); this.$emit("delete-node", node); // 触发父组件的 delete-node 事件,并传递当前节点 }, }, }; </script> <style scoped> .tree { padding-left: 15px; } .children { padding-left: 15px; } .tree-node { display: flex; align-items: center; } .action-button { cursor: pointer; margin-left: 10px; color: #409eff; } .edit-button { float: right; } .delete-button { float: right; } </style>
在页面中使用...
<template> <view class="page"> <Tree :treeData="treeData" :expandAll="expandAll" @edit-node="handleEditNode" @delete-node="handleDeleteNode" /> </view> </template> <script> import Tree from "@/components/TreeData"; export default { components: { Tree, }, data() { return { treeData: [ { label: "根节点 1", children: [ { label: "子节点 1-1", children: [ { label: "子节点 1-1-1", children: [], }, { label: "子节点 1-1-2", children: [], }, ], }, { label: "子节点 1-2", children: [], }, ], }, { label: "根节点 2", children: [ { label: "子节点 2-1", children: [], }, ], }, ], expandAll: true, // 控制是否全部展开 }; }, methods: { handleEditNode(node) { console.log("编辑节点", node); // 处理编辑节点的逻辑 }, handleDeleteNode(node) { console.log("删除节点", node); // 处理删除节点的逻辑 }, }, }; </script> <style scoped> page { background-color: #f5f6f8; } .page { padding: 20px; } </style>
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