uview-plus组件库全面升级更新，订单结算判断支付方式是否可用代码调整，公众号关注二维码修改

uni_modules/uview-plus/components/u-tree/u-tree.vue

@@ -0,0 +1,117 @@
+<template>
+  <view class="u-tree">
+    <tree-node
+      v-for="node in treeData"
+      :key="node[props.nodeKey]"
+      :node="node"
+      :props="props"
+      :show-checkbox="showCheckbox"
+      :check-strictly="checkStrictly"
+      :expand-on-click-node="expandOnClickNode"
+      @node-click="handleNodeClick"
+      @check-change="$emit('check-change', $event)">
+      <template #default="{ nodeData, level }">
+        <slot :node="nodeData" :level="level"></slot>
+      </template>
+    </tree-node>
+  </view>
+</template>
+
+<script>
+import TreeNode from './tree-node.vue';
+
+export default {
+  name: 'u-tree',
+  components: { TreeNode },
+  props: {
+    data: {
+      type: Array,
+      required: true
+    },
+    props: {
+      type: Object,
+      default: () => ({
+        label: 'label',
+        children: 'children',
+        nodeKey: 'id'
+      })
+    },
+    showCheckbox: {
+      type: Boolean,
+      default: false
+    },
+    defaultExpandAll: {
+      type: Boolean,
+      default: false
+    },
+    expandOnClickNode: {
+      type: Boolean,
+      default: true
+    },
+    checkStrictly: {
+      type: Boolean,
+      default: false
+    }
+  },
+  data() {
+    return {
+      treeData: []
+    };
+  },
+  created() {
+    this.initTree();
+  },
+  watch: {
+    data: {
+      handler(newVal) {
+        this.treeData = JSON.parse(JSON.stringify(newVal));
+        this.initExpandedState(this.treeData, this.defaultExpandAll);
+      },
+      deep: true,
+      immediate: true
+    }
+  },
+  emits: ['node-click', 'check-change'],
+  methods: {
+    initTree() {
+      this.treeData = JSON.parse(JSON.stringify(this.data));
+      this.initExpandedState(this.treeData, this.defaultExpandAll);
+    },
+    initExpandedState(nodes, expanded) {
+      nodes.forEach(node => {
+        node.expanded = expanded;
+        if (node[this.props.children]) {
+          this.initExpandedState(node[this.props.children], expanded);
+        }
+      });
+    },
+    handleNodeClick(node) {
+      this.$emit('node-click', node);
+    },
+    /**
+     * 直接递归 treeData 获取所有 checked 的节点
+     */
+    getCheckedNodes() {
+        const traverse = (nodes) => {
+            let result = [];
+            nodes.forEach(node => {
+            if (node.checked) {
+                result.push(node);
+            }
+            if (node[this.props.children] && node[this.props.children].length > 0) {
+                result = result.concat(traverse(node[this.props.children]));
+            }
+            });
+            return result;
+        };
+        return traverse(this.treeData);
+    }
+  }
+};
+</script>
+
+<style scoped>
+.u-tree {
+  font-size: 28rpx;
+}
+</style>