ivew数控件Tree自定义节点内容示例分析

ivew数控件Tree自定义节点内容示例分析

demo地址：https://run.iviewui.com/plcWlM4H

<template>
    <Tree :data="data5" :render="renderContent"></Tree>
</template>
<script>
    export default {
        data () {
          
            return {
                data5: [
                    {
                        title: ‘parent 1‘,
                        expand: true,
                        children: [
                            {
                                title: ‘child 1-1‘,
                                expand: true,
                                children: [
                                    {
                                        title: ‘leaf 1-1-1‘,
                                        expand: true
                                    },
                                    {
                                        title: ‘leaf 1-1-2‘,
                                        expand: true
                                    }
                                ]
                            },
                            {
                                title: ‘child 1-2‘,
                                expand: true,
                                children: [
                                    {
                                        title: ‘leaf 1-2-1‘,
                                        expand: true
                                    },
                                    {
                                        title: ‘leaf 1-2-1‘,
                                        expand: true
                                    }
                                ]
                            }
                        ]
                    }
                ],
                buttonProps: {
                    type: ‘default‘,
                    size: ‘small‘,
                }
            }
        },

      //<Icon type="ios-create-outline" />
      
        methods: {
            renderContent (h, { root, node, data }) {
                //console.log(root, ‘树的根节点‘, node, ‘当前节点‘, data, ‘当前节点数据‘);
                /*
                
                @root <Array>  把整个树 扁平化 后的  数组   
                @node <Object> 当前节点
                @date <Object> 当前节点数据
                
                nodeKey 每个节点 的唯一标识  
                parent 父级的 nodeKey
                
                */
                return h(‘span‘, {
                    class: ‘span1‘,
                    style: {
                        display: ‘inline-block‘,
                        width: ‘100%‘
                    },
                }, [
                    h(‘span‘, [
                        h(‘Icon‘, {
                            props: {
                                type: ‘ios-paper-outline‘
                            },
                            class: ‘wenjiantubiao‘,
                            style: {
                                marginRight: ‘8px‘
                            }
                        }),
                        h(‘span‘, data.title)  // 节点标题
                    ]),
                    h(‘span‘, {  //右侧操作 包裹
                        class: ‘youcecaozuo‘,
                        style: {
                            display: ‘inline-block‘,
                            float: ‘right‘,
                            marginRight: ‘32px‘
                        }
                    }, [
                        h(‘Button‘, { //添加按钮
                            props: Object.assign({}, this.buttonProps, {
                                icon: ‘ios-add‘
                            }),
                            style: {
                                marginRight: ‘8px‘
                            },
                            on: {
                                click: () => { this.append(data) }
                            }
                        }),
                        h(‘Button‘, {  //删除按钮
                            props: Object.assign({}, this.buttonProps, {
                                icon: ‘ios-remove‘
                            }),
                            on: {
                                click: () => { this.remove(root, node, data) }
                            }
                        })
                    ])
                ]);
            },
            append (data) {
                const children = data.children || [];
                children.push({
                    title: ‘appended node‘,
                    expand: true
                });
                this.$set(data, ‘children‘, children);
            },
            remove (root, node, data) {
                //console.log(root, node, data, ‘三个东西‘);
                console.log(node, ‘确定的node节点‘);
                /*
                因为 参数node 是从 root 上引用 处理的 所以 find 时 可以 判断 el对象 和 node 对象是否相等,
                详见：https://www.cnblogs.com/taohuaya/p/11535432.html
                */
                const parentKey = root.find(el => {
                  console.log(el, ‘root每项‘);
                  return el === node;
                }).parent;  //找到删除项的 父级标识
              
                const parent = root.find(el => el.nodeKey === parentKey).node;  //通过 删除的 父级标识 找到 父级元素
                const index = parent.children.indexOf(data);   //在父级的children数组 中 找到当前删除元素 的索引 index 
                parent.children.splice(index, 1);  //在父级children中 删除掉 要删除的元素
            }
        }
    }
  
  
 
    
  /*     
         render: (h, { root, node, data }) => {
                            return h(‘span‘, {
                                style: {
                                    display: ‘inline-block‘,
                                    width: ‘100%‘
                                }
                            }, [
                                h(‘span‘, [
                                    h(‘Icon‘, {
                                        props: {
                                            type: ‘ios-folder-outline‘
                                        },
                                        style: {
                                            marginRight: ‘8px‘
                                        }
                                    }),
                                    h(‘span‘, data.title)
                                ]),
                                h(‘span‘, {
                                    style: {
                                        display: ‘inline-block‘,
                                        float: ‘right‘,
                                        marginRight: ‘32px‘
                                    }
                                }, [
                                    h(‘Button‘, {
                                        props: Object.assign({}, this.buttonProps, {
                                            icon: ‘ios-add‘,
                                            type: ‘primary‘
                                        }),
                                        style: {
                                            width: ‘64px‘
                                        },
                                        on: {
                                            click: () => { this.append(data) }
                                        }
                                    })
                                ])
                            ]);
                        },
        
        */
 
  
  
</script>

视图：