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iview/examples/routers/tree.vue

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+<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>