iview/examples/routers/tree.vue

<template>
    <div>
        <Tree ref="treeRef" :data="data4" show-checkbox multiple></Tree>
        <Button @click="get">
            get
        </Button>
    </div>
</template>
<script>
    export default {
        data () {
            return {
                data4: [
                    {
                        title: 'parent 1',
                        expand: true,
                        children: [
                            {
                                title: 'parent 1-1',
                                expand: true,
                                children: [
                                    {
                                        title: 'leaf 1-1-1',
                                        checked : false,
                                        disabled: true
                                    },
                                    {
                                        title: 'leaf 1-1-2'
                                    }
                                ]
                            },
                            {
                                title: 'parent 1-2',
                                expand: true,
                                children: [
                                    {
                                        title: 'leaf 1-2-1',
                                    },
                                    {
                                        title: 'leaf 1-2-1'
                                    }
                                ]
                            }
                        ]
                    }
                ]
            }
        },
        methods: {
            get(){
                console.log(this.$refs.treeRef.getCheckedNodes())
            }
        }
    }
</script>