【vue】ant-design-vue的树结构实现节点增删改查

根据业务需要，实现树结构的节点新增编辑删除功能，主要逻辑是利用树节点的scopedSlots属性对其进行自定义改造，监听悬停事件在节点右侧出现增删改对应图标，点击图标出现弹窗表单对内容进行修改，具体代码如下：

// 模板部分
<template>
  <a-tree
     v-if="factorTreeData.length > 0"
     show-icon
     default-expand-parent
     :tree-data="factorTreeData"
     :defaultExpandAll="true"
     :autoExpandParent="true"
     :default-selected-keys="selectedKeys"
     @select="onTreeSelect">
     <template slot="custom" slot-scope="item">
       <div @mouseenter="onMouseEnter(item)" style="position: relative;">
         <span class="treeMode">
           <a-icon v-if="!item.isLeaf" :type="item.expanded ? 'folder-open' : 'folder'" />
           <a-icon type="file" v-if="item.isLeaf"/>
           <span style="margin-left: 5px">
             {{ item.title }}
           </span>
         </span>
         <a-space
           @click.stop
           v-if="mouseItemId === item.key"
           style="position: absolute; right: 5px; top: 0"
         >
           <a-button type="primary" size="small" icon="plus" @click="addTreeNode(item)" />
           <a-button type="primary" size="small" icon="edit" @click="editTreeNode(item)" />
           <a-button type="primary" size="small" icon="delete" @click="delTreeNode(item)" />
         </a-space>
       </div>
     </template>
   </a-tree>
    <a-modal
        v-drag-modal
         v-model="visible"
         :title="modalTitle"
         :destroyOnClose="true"
         @ok="handleSave"
         :width="800"
         :bodyStyle="{'height': '480px', 'overflow-y': 'auto'}"
         centered
       >
         <ItemModal ref="childModal" :formObj="formObj"/>
    </a-modal>
</template>

//js部分
<script>
	export default {
	 components: {
      ItemModal: () => import ('./item-modal') // 表单弹窗
     },
	 data () {
      	return {
      		// 树结构
	        factorTreeData: [],
	        expandedKeys: [],
	        selectedKeys: [],
	        mouseItemId: '',
	         // 弹窗
       		modalTitle: '',
            visible: false,
	        formObj: {}
      	}
      },
      mounted () {
      	this.getTreeData()
      },
      methods: {
        // 获取树（模拟数据）
       getTreeData () {
        this.factorTreeData= [
	        {
			    title: '0-0',
			    key: '0-0',
			    children: [
			      {
			        title: '0-0-0',
			        key: '0-0-0',
			        children: [
			          { title: '0-0-0-0', key: '0-0-0-0' },
			          { title: '0-0-0-1', key: '0-0-0-1' },
			          { title: '0-0-0-2', key: '0-0-0-2' },
			        ],
			      },
			      {
			        title: '0-0-1',
			        key: '0-0-1',
			        children: [
			          { title: '0-0-1-0', key: '0-0-1-0' },
			          { title: '0-0-1-1', key: '0-0-1-1' },
			          { title: '0-0-1-2', key: '0-0-1-2' },
			        ],
			      },
			    ],
			  }
		  ]
		  this.dealTreeData(this.factorTreeData || [])
		  this.selectedKeys = [this.factorTreeData.children[0].key]
          this.mouseItemId = this.factorTreeData.children[0].key
	    },
      	// 给每个节点添加自定义属性
      	dealTreeData (dataArr) {
         dataArr.forEach((el, i) => {
          el.value = el.key 
          if (el.children && el.children.length > 0) {
            el.isLeaf = false
            el.selectable = false
            el['scopedSlots'] = { title: 'custom' } 
            this.dealTreeData(el.children)
          } else {
            el.isLeaf = true
            el['scopedSlots'] = { title: 'custom' }
          }
        })
      },
      // 节点选择事件
      onTreeSelect (selectedKeys) {
      },
	  // 树鼠标悬停事件
      onMouseEnter (item) {
        this.mouseItemId = item.key
      },
      // 添加树节点
      addTreeNode (item) {
        this.formObj = {
          id: null,
          pid: item.parentId,
          name: '',
          displayOrder: '',
          status: '',
          remark: ''
        }
        this.modalTitle = '新增'
        this.visible = true
      },
      // 编辑树节点
      editTreeNode (item) {
        getTreeInfo({ id: item.id }).then(res => {
          if (res.code === 200) {
            this.formObj = {
              id: res.result[0].id,
              pid: res.result[0].pid,
              name: res.result[0].name,
              displayOrder: res.result[0].displayOrder,
              status: res.result[0].status,
              remark: res.result[0].remark
            }
            this.modalTitle = '编辑'
            this.visible = true
          }
        }).catch(err => console.log(err))
      },
      // 保存树节点
      handleSave() {},
      // 删除树节点
      delTreeNode (item) {
        const that = this
        this.$confirm({
          title: '确定要删除吗？',
          onOk () {
            delTree({ ids: item.id }).then(res => {
              if (res.code === 200) {
                that.$message.success('删除成功！')
                that.getTree() // 重新请求树数据
              } else {
                that.$message.error('删除失败！')
              }
            }).catch(err => {
              console.log(err)
              this.$message.error('删除失败！')
            })
          }
        })
      }
	}
</script>
 <style lang="less" scoped>
 // 树
    ::v-deep .ant-tree {
      li {
        padding: 1px 0;
      }

      .ant-tree-node-content-wrapper {
        width: calc(100% - 24px);
        height: 32px;
        line-height: 32px;
      }
      .treeMode {
        height: 30px;
        width: 70%;
        display: flex;
        align-items: center;
        span {
          height: 30px;
          display: inline-block;
          max-width: 80%;
          overflow: hidden;
          text-overflow: ellipsis;
          padding-right: 5px;
        }
      }
    }
    ::v-deep .ant-tree.ant-tree-directory > li span.ant-tree-node-content-wrapper::before {
      height: 32px;
    }
 </style>

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209

示例：