Tree樹形組件是 iview 中相對復雜的一個組件。

自定義節點內容

使用強大的 Render 函數可以自定義節點顯示內容和交互，比如添加圖標，按鈕等。

　　　　——官方文檔

但官方的 example 只有增和刪的功能，而我想加置頂和修改名字的功能。

上代碼：

Helloworld.vue

<template>
  <div class="hello">
    <div class="core">
        <div class="abs-zone"
 
 v-if="editZoneDisplayBoolean">
            <div class="box">
                <Input placeholder="Enter something..." style="width:200px" v-model="beforeSubmitNodeTitleString" />
                <Button type="success" :style="{marginLeft:‘5px‘}" @click="submitNameEditFunc(1)">
                    <
 
Icon type="md-checkmark" />
                </Button>
                <Button type="error" :style="{marginLeft:‘5px‘}" @click="submitNameEditFunc(0)">
                    <Icon type="md-close" />
                </Button>
            </div>
        </div>
        <
 
Tree :data="data5" :render="renderContent" show-checkbox multiple></Tree>
    </div>
  </div>
</template>

<script>
export default {
    data () {
        return {
            root:null,
            editZoneDisplayBoolean:false,
            beforeSubmitNodeTitleString:‘‘,
            edit_root:null,
            edit_node:null,
            edit_data:null,
            data5: [
                {
                    title: ‘parent 1‘,
                    expand: true,
                    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: ‘135px‘
                                    },
                                    on: {
                                        click: () => { this.append(data) }
                                    }
                                })
                            ])
                        ]);
                    },
                    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 1-2-2‘,
                                    expand: true
                                }
                            ]
                        }
                    ]
                }
            ],
            buttonProps: {
                type: ‘default‘,
                size: ‘small‘,
            }
        }
    },
    methods: {
        renderContent (h, { root, node, data }) {
            return h(‘span‘, {
                style: {
                    display: ‘inline-block‘,
                    width: ‘100%‘
                }
            }, [
                h(‘span‘, [
                    h(‘Icon‘, {
                        props: {
                            type: ‘ios-paper-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‘
                        }),
                        style: {
                            marginRight: ‘8px‘
                        },
                        on: {
                            click: () => { this.append(data) }
                        }
                    }),
                    h(‘Button‘, {
                        props: Object.assign({}, this.buttonProps, {
                            icon: ‘ios-remove‘
                        }),
                        style: {
                            marginRight: ‘8px‘
                        },
                        on: {
                            click: () => { this.remove(root, node, data) }
                       }
                    }),
                    h(‘Button‘, {
                        props: Object.assign({}, this.buttonProps, {
                            icon: ‘ios-create‘
                        }),
                        style: {
                            marginRight: ‘8px‘
                        },
                        on: {
                            click: () => { this.openEditName(root, node, data) }
                       }
                    }),
                    h(‘Button‘, {
                        props: Object.assign({}, this.buttonProps, {
                            icon: ‘ios-arrow-round-up‘
                        }),
                        on: {
                            click: () => { this.toUp(root, node, data) }
                       }
                    })
                ])
            ]);
        },
        append (data) {
            const children = data.children || [];
            children.push({
                title: ‘appended node‘,
                expand: true
            });
            this.$set(data, ‘children‘, children);
        },
        remove (root, node, data) {
            const parentKey = root.find(el => el === node).parent;
            const parent = root.find(el => el.nodeKey === parentKey).node;
            const index = parent.children.indexOf(data);
            parent.children.splice(index, 1);
        },
        toUp (root, node, data) {
            const parentKey = root.find(el => el === node).parent;
            const parent = root.find(el => el.nodeKey === parentKey).node;
            const index = parent.children.indexOf(data);
            const children = parent.children
            children.unshift({
                ...data
            });
            children.pop()
            this.$set(parent, ‘children‘, children);
        },
        openEditName (root, node, data) {
            this.editZoneDisplayBoolean = true
            this.edit_root = root
            this.edit_node = node
            this.edit_data = data
            this.beforeSubmitNodeTitleString = this.edit_node.node.title
        },
        submitNameEditFunc(x){
            if (!x) {
                this.editZoneDisplayBoolean = false
                return
            } else {
                this.edit_node.node.title = this.beforeSubmitNodeTitleString
                this.editZoneDisplayBoolean = false
                return
            }
        }
    }
};
</script>

<!-- Add "scoped" attribute to limit CSS to this component only -->
<style scoped lang="less">
@edit-zone-height:32px;

.core{
    width: 500px;
    height: 400px;
    border:1px solid #979797;
    border-radius: 5px;
    padding: 10px;
    overflow: hidden;
    position:relative;
    .abs-zone{
        position: absolute;
        width: 100%;
        height: 100%;
        top:0;
        left: 0;
        background: rgba(255,255,255,.8);
        z-index: 1;
        .box{
            position:absolute;
            width: 100%;
            top:50%;
            left: 0;
            margin-top: -@edit-zone-height;
            text-align: center;
        }
    }
}
</style>

App.vue

<template>
  <div id="app">
    <HelloWorld/>
  </div>
</template>

<script>
import HelloWorld from ‘./components/HelloWorld‘

export default {
  name: ‘App‘,
  components: {
    HelloWorld
  }
};
</script>

<style>
#app {
  font-family: ‘Avenir‘, Helvetica, Arial, sans-serif;
  padding: 20px;
}
</style>

截圖：

iview實戰 : 樹形組件自定義